Belt Drives & Bearings Reference Guide

Transcription

1 elt Drives & earings Reference Guide

2 Velts Unique design enhances performance and provides increased HP capacity in shorter center drives. FHP 3L 3/8 4L 1/2 5L 21/32 CLASSICAL A elts 1/2 5/16 elts 21/32 7/16 C elts 7/8 17/ V 3/8 5/16 5V 5/8 17/32 8V 1 29/32

3 Contents Page Save the Green elts Sheaves Split Taper ushing...99 earings Visit our online resources Velt Drives and earings Electronic Tools for the HVAC Industry ecatalog Smart Interchange EDGE selection program 1

4 ustain Energy Responsibility In Four Easy Steps 1 Upgrade from wrapped to notched belts and improve efficiency Worn sheaves allow belt slip. Inspect sheaves for wear. Wear greater than 1/32 can decrease efficiency 5% or more Properly tension belts Install TensoSet selfadjusting motor base 2

5 Upgrade from wrapped to notched belts and improve efficiency 15 HP $2, HP $1, HP $1, HP $1, HP $ HP $ HP $ HP $ HP $ HP $ HP $ HP $ HP $ HP $ HP $ HP $ HP $ HP $ HP $9.46 Try Out Our Free Toolbo Technician App Energy Efficiency Calculator GPSactivated Where To uy Conversion tools And many other great features. A single 1HP belt driven application that drops from 98% to 95% in efficiency costs $1422. annually in added electricity. (ased on $.12/kWh, 18hrs/7 day wk usage at 75% load) PTS.com Visit our website for a full suite of installation instructions, product interchange software, downloadable catalogs and more. Facebook.com/ PowerTransmissionSolutions Linkedin.com Search rowning elt Drives Save the Green 3

6 ustain HVAC Monitoring Services The movement of air is often the largest consumer of electricity in a commercial building. rowning can help you recommission your equipment for maimum efficiency and payback, using products and monitoring services to recover lost efficiency. We measure these variables to calculate efficiency upgrade opportunities and projected payback: Real energy usage earing temperature elt temperature Shaft speeds Humidity Differential pressure Inside/outside air temperature 4

7 Field Diagnostic Equipment Temperature Sensors Rotational Speed Sensors Power Meter Differential Pressure Sensors Independent Network These sensors deliver realtime data directly to your smartphone via EVA, the "Energy Evaluation App". View our HVAC Services and Monitoring video at YouTube channel ThePowerTransmission or scan the QR code 5

8 It s 15 F on your rooftop today. Are you using rowning EPDM vbelts in your highperformance air handler? For decades, customers have asked for greater temperature range due to high ambient and operating temperatures in many applications. Industry standard vbelts utilize polychloroprene synthetic rubber compounds which limit operating temperatures from 3 F to +14 F. Our EPDM (Ethylene Propylene Diene Monomer) rowning vbelts* epand that temperature range considerably. Operating temperatures for EPDM vbelts are 6 F to +25 F. This epanded range helps ensure longlife and reliable performance even in the most demanding climates and heat sensitive applications. Key Features Fabric Top and ottom Increases rigidity and stability Reduces stress on the cord line Increases belt life Wider Notch Spacing Increases rigidity and stability Reduces stress on the cord line Increases belt life Ground Form Lowest CD variation design Reduces vibration Increases belt and bearing life High HP Capacity The Proven Performer, designed to handle the toughest market conditions. Code 1 Matched elts Designed to eceed the RMA/ ARPM matching limits. Machine Matching Warehouse machine match up to sets of 1 available at no additional cost. Fiber Loading The fiber loaded body is designed for the longest life, fleibility and HP capacity. View our EPDM belts video at YouTube channel ThePowerTransmission or scan the QR code 6

9 What Is EPDM? EPDM or Ethylene Propylene Diene Monomer, is a synthetic rubber compound. EPDM is strong, fleible, and resists decay. It is ozone, oidation, humidity, and heat resistant. Operational temperature for EPDM vbelts are 6 F to 25 F. Advantages Greater operating temperature range Increased efficiency up to 3% with 3V, 5V, 8V, A,, C Longer belt life Smoother running due to higher tolerance for misalignment Tubular Fabric Unique tubular woven knit fabric, designed for maimum fleibility and performance. Oil/Heat Resistance & Static Conductivity Meets RMA standards for oil and heat resistance as well as static conductivity. rowning EPDM elts: 6 to 25 F 25 F F Industry Standard elts: 3 to 14 F 6 F F 7

10 SelfTensioning Motor ase The rowning Tensoset TM Series 6 horizontal sliding motor base with optional quick release (QR) is an industry first for Vbelt drives, enhancing technician convenience and belt drive efficiency by automatically maintaining belt tension for etended periods and allowing quick belt changes in just minutes. ENEFITS Significantly reduces time required to change vbelts Promotes greater efficiency by constantly maintaining vbelt tension Tube rail and onepiece carriage design promotes and maintains superior drive alignment Improved safety. No need to cut off belts or roll them onto sheaves Functionality 1. Closed latch and operating position 2. Detensioned drive allows release lever gate to slide open 3. Motor carriage slides forward and tensioning bolt passes through frame allowing a significant reduction in time required to safely change vbelts and maintenance system 8 Constant spring tension automatically compensates for belt wear and reduces frequency of belt adjustments

11 NEMA ase SelfAdjusting Part Description ase Number NEMA Frame HP Cap. 18 or Equivalent SAMN SAMN SAMN SAMN SAMN SAMN SAMN925 D SAMN927 D SAMN929 D SAMN931 D SAMN933 D NEMA ase Quick Release SelfAdjusting Part Description ase Number NEMA Frame HP Cap. 18 or Equivalent SAMN61QR SAMN65QR SAMN67QR SAMN613QR SAMN621QR SAMN623QR IEC ase SelfAdjusting Part Description ase Number IEC Frame HP Cap. 18 or Equivalent SAMI61 61 N/A N/A SAMI S9L 2 SAMI S112M 5 SAMI S132M 1 SAMI M16L 2 SAMI M18L 3 SAMI925 D925 2M2L 5 SAMI927 D S225M 75 SAMI929 D929 25S25M 1 SAMI931 D931 28S28M 15 IEC ase Quick Release SelfAdjusting Part Description ase Number IEC Frame HP Cap. 18 or Equivalent SAMI61QR 61 N/A N/A SAMI65QR 65 9S9L 2 SAMI67QR S112M 5 SAMI613QR S132M 1 SAMI621QR M16L 2 SAMI623QR M18L 3 9

12 elts & Sheaves Technology Leadership to Meet Drive Requirements with Shorter Center Distance and Higher Speeds Variable Speed Sheaves Engineered Features Eternal rib design provides cooling for longer belt life Increases wall thickness by 3% Increased hub diameter by 2% Tighter tolerances by 25% alanced as components Twice balanced after assembly Larger MVP sheaves dynamically balanced in two planes Tightened microfinish on groove walls for increased belt life Now accommodates 5V belts rowning rand Velts Engineered Features Special blend of fiberglass and polyester for belt cord fleibility and strength Length tolerances 1 tighter than industry standard Single belt fabric with no overlap for reduced vibration Tubular woven fabric for lengthwise fleibility and cross rigidity Ground form edges on A,, 3V and 5V belts for reduced vibration Super Gripbelt 358 Gripbelt Variable Pitch Cast Iron Sheaves 1 The EDGE selection program your online support for VDrive and bearing selection. EDGE online tools include: ecatalog, product selection, CAD templates, Smart Interchange, product literature and engineered solutions. Available at

13 Inde Page Velt Advantages & Construction Section 1 Preventive Maintenance and Installation of Velt Drives Section 2 Corrective Maintenance and Troubleshooting of Velt Drives A Troubleshooting Installation Problems Troubleshooting Selection Problems C Troubleshooting Environmental Problems D Troubleshooting Design Problems E Design and Installation Suggestions F Gripbelt Drive Engineering Data elts Super Gripbelt elts Gripnotch elts FHP elts Gripbelts elts Cross Reference Sheaves AK Sheaves AK Sheaves AKH Sheaves AKH Sheaves K Sheaves K Sheaves KH Sheaves KH Sheaves Stock Sheave Interchange V Sheaves VP Sheaves VP Sheaves VL,VM Sheaves Split Taper ushings Visit our online resources

14 Velt Drive Advantages Vbelt drives provide many maintenance advantages that help in your daily struggle to reduce equipment repairs and to hold forced downtime to the lowest possible level. 1. They are rugged they will give years of troublefree performance when given just reasonable attention...even under adverse conditions. 2. They are clean require no lubrication. 3. They are efficient performing with an average of 9498% efficiency. 4. They are smooth starting and running. 5. They cover etremely wide horsepower ranges. 6. They permit a wide range of driven speeds, using standard electric motors. 7. They dampen vibration between driving and driven machines. 8. They are quiet. 9. They act as a safety fuse in the power drive because they refuse to transmit a severe overload of power, ecept for a very brief time. 1. Vbelts and sheaves wear gradually making preventive corrective maintenance simple and easy. 12

15 Velt Construction Unique design enhances performance provides increased HP capacity in shorter center drives. Gripelt Gripnotch elt efore we talk about Avoiding Problems and Solving Problems let s take a brief look at how Vbelts are constructed. There are basically two types of construction. One has a fabric wrapper (or jacket) surrounding it; the other usually rated higher in horsepower is made in a raw edged, cogged construction. Gripelt 1. Single Fabric Design More fleible use with subminimal pitch diameters. Reduced overlap reduces vibration 2. Improved Cord Adhesion 3. Improved fleibility cords 4. Improved SR compounds Gripnotch Velts 1. Ground Form Reduces vibration, increases belt and bearing life. 2. Fabric Top and ottom Increases rigidity and stability. Reduces stress on the cord line, increases belt life. 3. Wider Notch Spacing Increases rigidity and stability. Reduces stress on the cord line increases belt life. 13

16 Section 1 Preventive Maintenance and Installation of Velt Drives Read and follow all instructions carefully. Disconnect and lockout power before installation and maintenance. Working on or near energized equipment can result in severe injury or death. Do not operate equipment without guards in place. Eposed equipment can result in severe injury or death. Periodic inspections should be performed. Failure to perform proper maintenance can result in premature product failure and personal injury. You will notice reference key numbers (such as A1) appear throughout this section. These refer to a more detailed discussion with illustrations relating to the subject in Section 2 (Corrective Maintenance and Troubleshooting). 14

17 Section 1 Preventive Maintenance and Installation of Velt Drives 1. Safety First efore doing any maintenance work on power drives, be sure the controlling switch is in the off position and locked if possible. Follow your plant s safety rules. 2. Select Replacement elts 1, 2, 3, 4 After you have made any necessary corrections in your Vbelt drive elements, the net step is the selection of the correct replacement belts. When replacing sets of Vbelts, here are some very important reminders: Never mi new and used belts on a drive. Never mi belts from more than one manufacturer. Always replace with the right type of Vbelt. Always observe Vbelt matching limits. 3. Remove elt Guard A1 Clean and inspect belt guard thoroughly. After removing the drive guard, loosen the drive takeup and move the sheaves closer together to facilitate the removal of any old belts, and to ensure installation of the new belts without damage. 15

18 Section 1 Preventive Maintenance and Installation of Velt Drives 4. Inspect Drive Elements A1, A6 This is a good time to service the takeup rails by removing any rust, debris, or dirt. Lubricate the bearings as necessary so tensioning of the new belts will go smoothly and easily. This is also an ecellent opportunity to inspect and replace faulty or damaged machine elements such as worn bearings and bent shafts. These maintenance procedures not only reduce the likelihood of future mechanical trouble, but also ensure maimum service from the new belts. 16

19 Section 1 Preventive Maintenance and Installation of Velt Drives 5. Inspect Sheaves A4, A9 Sheave condition and alignment are vital to Vbelt life and performance. New Vbelts should never be installed without a careful and thorough inspection of the sheaves involved. Particular attention should be given to these conditions. Replace sheaves if worn: a. Worn groove sidewalls b. Shiny sheave groove bottom c. Wobbling sheaves d. Damaged sheaves Sheaves should be carefully cleaned of any rust and foreign material. A wire brush followed up by wiping with a shop cloth will usually do the job. Worn Groove Sidewalls Shiny Sheave Groove ottom Wobbling Sheaves Damaged Sheaves Groove Gage 17

20 Section 1 Preventive Maintenance and Installation of Velt Drives 6. Check Sheave Alignment A3 One of the great advantages of Vbelt drives is the fact that perfect alignment of sheaves is not critical to the operation of the drive. However, the better the alignment, the better the performance. Refer to Section 2, A3, for information on proper alignment procedures and tolerances. Note: Sheaves should always be mounted as close to the bearings as practical to avoid ecessive loads on bearings and shafts. 7. Installing New elts A1 Place the new belts on the sheaves, and be sure that the slack of each belt is on the same side. You can do this by pressing the belts with your hand to bring the slack on one side of the drive. Loosening the drive takeup in advance makes this easy. Do not force the belts on the sheaves by using a pry bar or by rolling the sheaves. Move sheaves apart until the belts are seated in the grooves. Tighten drive until slack is taken up. (Tensioning suggestions follow in Step 8). 18

21 Preventive Maintenance and Installation of Velt Drives 8. Apply Tension A7, A8 All Vbelt drives must operate under proper tension to produce the wedging action of the belt against the groove sidewall. A wellestablished rule of thumb is that the best tension for a Vbelt drive is the LEAST tension at which the drive will not slip under peak load. rowning recommends using a belt tension checker to properly tension belts. Section 1 9. Recheck Sheave Alignment A3 Anytime sheaves have moved, recheck sheave alignment. Refer to Section 2, A3, for information on proper alignment procedures and tolerances. 1. Replace Guard Start drive. (Look and listen) Check tension after 8, 24 and 1 hours and periodically thereafter. 11. Start Drive A7 Properly designed Vbelt drives should not squeal under peak load conditions. If necessary, stop the drive, then start it again. If a squeal is heard, the belts should be tightened to the point where they do not squeal under peak load. Newly installed belts require about 24 hours to become fully seated in the groove. Retension after 3 minutes, 8 hours, 24 hours, 1 hours, and periodically thereafter. 19

22 Preventive Maintenance and Installation of Velt Drives Velt Installation Check List Section Turn off and lock out power source Observe all other safety procedures Select proper replacement belts Remove belt guard Inspect drive elements bearings, shaft, etc. Inspect sheave grooves for wear Check sheave alignment Install new belts Tension belts Check sheave alignment (final) 1. Replace guard 11. Start drive (look & listen) 2

23 Corrective Maintenance and Troubleshooting of Velt Drives Section 2 Read and follow all instructions carefully. Disconnect and lockout power before installation and maintenance. Working on or near energized equipment can result in severe injury or death. Do not operate equipment without guards in place. Eposed equipment can result in severe injury or death. Periodic inspections should be performed. Failure to perform proper maintenance can result in premature product failure and personal injury. The first section of this HVAC Pocket Reference Guide outlined a stepbystep procedure for the installation of replacement Vbelts to help you prevent Vbelt maintenance problems. The reason behind these steps is also fundamental in the daily inspection and maintenance of Vbelt drives. Watching and listening will alert you to warning signs of trouble, since one of the greatest advantages of Vbelt drives is the fact that belts and sheaves wear gradually. You can spot potential problems in time to arrange short, scheduled maintenance downtime instead of eperiencing a longer, costly interruption of production when unepected trouble occurs. You can compare Vbelts to an electrical fuse their unepected failure is usually a signal that something else in the system is wrong. Even their patterns of gradual wear often indicate conditions needing corrections or improvements. 21

24 Section 2 Corrective Maintenance and Troubleshooting of Velt Drives CURES A1 A2 A3 A4 A5 SYMPTOMS CAUSES elts Pried On or Misplaced Slack elts Rubbing Guard Sheaves Misalligned Worn or Damaged Sheaves Sheaves Too Far From earing Rapid Sidewall Wear l l l Worn Cover on ack l ell Turns Over Or Jumps Off Sheave l elt Soft, Swollen elt Slips, Squeals (Spin urn) l elt Cover Split l Underside Cracked l Tieand Damaged l l l Repeated reakage l elts Ride Too High elts ottoming l Repeated Takeup Necesssary l elts Vibrate Ecessively or Appear Mismatched l l earing Are Hot l l Shafts Whip or end l l Cracked ushings l Sheave Wobble l Indicates most common causes 22

25 Corrective Maintenance and Troubleshooting of Velt Drives Section 2 A6 A7 A8 A C1 C2 C3 C4 C5 C6 C7 D1 D2 D3 D4 D5 Poor earing or Shaft Condition Insufficient Tension Ecessive Tension Improper Sheave Installation elts Worn (Normal Service Life) Wrong elt CrossSection or Type Mismatched elts or Mied rands MachineInduces Impulse or Shock Improper or Prolonged Storage Ecessive heat Ecessive Oil or Grease Use of elt Dressing Abrasive Environment Foreign Objects in Grooves Ecessive Moisture Overloaded Drive Underbelting Drive Serioulsy Overbelted Sheaves Too Small Insufficient Wrap on Small Sheave ackside Idler l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l 23

26 Section 2A Troubleshooting Installation Problems Read and follow all instructions carefully. Disconnect and lockout power before installation and maintenance. Working on or near energized equipment can result in severe injury or death. Do not operate equipment without guards in place. Eposed equipment can result in severe injury or death. Periodic inspections should be performed. Failure to perform proper maintenance can result in premature product failure and personal injury. As pointed out in Section 1 of this manual, preventive maintenance by using proper installation techniques is important for long, troublefree Vbelt service. Occasionally, however, you will find it necessary to correct problems caused by improper installation. This section deals with these problems and troubleshooting procedures. 24

27 Troubleshooting Installation Problems A1 Prying or forcing Vbelts onto the sheaves can, and usually does, break some of the loadcarrying tensile cords (see illustration on page 1, Section A1). When this happens, the belt may either break or turn over in the groove, usually within the first few minutes of operation. This method of installation may be evidenced by a rupture or split in the wrapped cover of the belt, caused by the prying tool or sheave edge. roken cords are easily identifiable on rawedge Vbelts because it is usually the edge cords that break first. Section 2A Misplaced slack can also cause belt breakage, again usually on startup. This occurs on multiplebelt drives when all of the belt slack is not brought to the same side of the drive before tensioning. If some belts are tight on one side, and others are tight on the other side, the heavy shock load of starting will be borne by only some of the belts, thus weakening or breaking the loadcarrying cords. Ruptured Cover A2 elts rubbing against the metal guard or other obstruction will be evidenced by cut or worn fabric on the back or upper edge of the Vbelt. Often just replacing missing bolts in guard brackets will remedy this situation. Fabric Worn on ackside 25

28 Section 2A Troubleshooting Installation Problems A3 Misaligned sheaves can cause rapid wear of the Vbelt sidewalls, considerably shortening service life of both belts and sheaves. Misalignment can also cause separation of the tieband on banded belts, or apparent mismatching of individual belts. Vbelt sheave alignment should be within a tolerance of 1/2 on notched belts and ±2 on wrapped belts. The three basic types of sheave and shaft misalignment are shown below. Suggested methods for checking and correcting each type are found on page 19. Sidewall Wear Note: All three types may be present at the same time. Alignment should be checked and corrected in the order given. Horizontal Angular Vertical Angular Parallel 26

29 Section 2A Troubleshooting Installation Problems 1. Horizontal Angular (shafts in same horizontal plane but not parallel) To Check: Use straightedge or string near sheave centers. To Correct: Loosen motor mounting bolts and rotate motor until all four points touch straightedge. 2. Vertical Angular (shafts not in the same plane and not parallel) To Check: Place straightedge about 1/4 radius from the outside diameter of both sheaves as shown. Repeat on opposite side of shaft 2. Straightedge should touch four points indicated in each position. To Correct: Use shims under motor base in front or rear of motor, depending on type of correction required. 3. Parallel (shafts are parallel; sheaves not in line) To Check: Use straightedge or string near sheave centers. To Correct: Loosen sheave so it slides easily on shaft until all four points touch straightedge. Retighten sheave in position. Important: Sheave should be mounted as close to bearing as possible to reduce overhung load on bearing. Relocate equipment if necessary. 27

30 Section 2A Troubleshooting Installation Problems A4 Worn or damaged sheaves are an even greater cause of rapid belt wear, slippage and vibration. adly worn sheaves can cause overtensioning of the drive to prevent slippage, indirectly causing overheated bearings and shaft damage. If pieces of the sheave flange are missing, it will result in badly worn sidewalls of the belt, and the resulting sheave imbalance can damage bearings and create a safety hazard. When only some of the grooves are worn more than others, the effect is that the belts appear to be mismatched. It also causes differential driving, where only some of the belts are carrying the entire load of the drive. In the case of banded belts, worn grooves cause the belts to ride too low in the grooves, thus causing the tieband to wear against the sheave flanges between the grooves. In severe cases, this can have the same effect as a circular blade, cutting the band and separating the belts. Sheave templates are available from your distributor, which can be used to check grooves accurately for wear. A flashlight held behind the template when placed in the groove will help you to Worn Sidewalls Cut Tieand Proper Position of elt in Sheave ottoming and Dishing of elt in Sheave 28

31 Section 2A Troubleshooting Installation Problems observe the amount of wear. Dishing should not eceed 1/32" for individual sheave sidewalls. A shiny groove bottom is a sign that the belt or sheave, or both are badly worn and the belt is bottoming in the groove. Worn sheaves or shiny sheave groove bottoms will show up first on the smaller sheave. The cost of replacing a worn sheave will be more than recovered in longer Vbelt life, reduced maintenance and downtime. A5 Sheaves mounted too far from the bearing cause ecessive overhung load on the bearing and overheating. This can also cause shafting to whip, bend or break. Sheaves should be mounted as close as possible to the bearing. If this affects alignment severely, it may be necessary to relocate the equipment to stay within alignment limits of 1/16" per 12" of shaft centertocenter distance. A6 earing condition and normal wear may well be the cause of overheating, rather than belt tension. They should be inspected for proper lubrication and wear according to the specifications of the bearing or equipment manufacturer. Shaft condition should also be checked and replaced if necessary, as bent shafts can be detrimental to bearings, belts and sheaves, as well as being a safety hazard due to the imbalance created. Sheave wobble may be caused by bent shafts. A7 Insufficient belt tension it's the leading cause of Vbelt slippage and premature belt failure. This is often evidenced by spin burn. The easiest and most practical way for maintenance personnel to judge proper belt tension is by use of a rowning belt tension checker. Spin urn 29

32 Section 2A Troubleshooting Installation Problems A8 Ecessive tension on Vbelts can be even more detrimental than too little tension, affecting not only the belts, but also bearings and shafts. Again, the best rule is to apply only enough tension on the belts to keep them from slipping during startup or peak loading. Some indicators of ecessive tensioning (but not always) are: Repeated belt breakage Overheated bearings Ecessive vibration Whipping or bent shafts A9 Improper sheave and bushing installation can result in sheave wobble as well as causing sheave hubs to crack. When installing splittapered bushings always follow manufacturer s instructions. It is important to never lubricate the tapered surfaces before installing. The lubrication will permit recommended torque wrench values to increase the actual force on the bushing and hub. This usually results in cracking of the hub at the bolt hole or keyway. On flanged bushing types, proper installation should result in a gap between the bushing flange and the hub face. The absence of a gap may indicate a problem. When removing splittapered bushings, start at the jackscrew hole opposite the split to avoid cracking the bushing. 3 Cracked ushing

33 Troubleshooting Selection Problems Section 2 Read and follow all instructions carefully. Disconnect and lockout power before installation and maintenance. Working on or near energized equipment can result in severe injury or death. Do not operate equipment without guards in place. Eposed equipment can result in severe injury or death. Periodic inspections should be performed. Failure to perform proper maintenance can result in premature product failure and personal injury. The array of Vbelt types, crosssections and lengths on the market today are all part of technological efforts to provide more efficient, costsaving answers to your drive requirements. This category is intended to point out how you can be sure of applying the best Vbelt type to your applications. 31

34 Troubleshooting Selection Problems Section 2 1 Worn Vbelts may have gotten that way simply because they have delivered the service life built into them. rowning, strives to design Vbelts with a balanced construction, so each element of the belt will last as long as all other elements. ut the wide variety of industrial applications, environmental conditions and maintenance practices makes this impossible to achieve. However, the epected life of an industrial Vbelt on a properly designed and maintained drive is three to five years. 2 Using the wrong Vbelt crosssection or type can create problems for you...and it s not hard to do, since many belts have similar dimensions. For eample, the following Vbelts have approimately the same top width (5/8") and length (85" outside circumference). And yet, the horsepower ratings of these belts range from as little as 2.2 HP per belt to as much as 11.9 HP per belt on a 5" diameter sheave and a 175 RPM motor! 32

35 Troubleshooting Selection Problems Section 2 3 Mismatched belts or mied brands from different manufacturers should not be matched together, and will not deliver the epected service life. Although all manufacturers use similar belt numbering systems, different brands with the same number will differ slightly in dimensions and are not capable of being mied in a set. Also, construction differences cause them to ride differently in the grooves, and to stretch differently. It should be noted that the majority of complaints regarding belt matching are due to other causes, such as misalignment and sheave wear. These factors should always be checked if belts seem to be mismatched. 4 Machineinduced vibration or shock loads frequently can cause Vbelts to whip or even jump off the drive, creating a safety hazard, and of course, damaging the belts. On multiplebelt drives, this whipping can be reduced or eliminated by using banded Vbelts. A banded Vbelt consists of from two to five individual Vbelts joined together with a bonded, reinforced tieband (see illustration). These belts ride slightly higher in the sheave grooves to provide clearance between the band and the sheave flange. ecause of this, sheave grooves should not be worn or dishedout more than 1/64". Also, because the belts are banded together, alignment of the sheaves is more critical. (The chart on the net page will be helpful in selecting the best belt for an application.) 33

36 Troubleshooting Selection Problems Velt Selection Guide Section 2 34 Static Dissipating Normal Temp. Range ( F) Oil/Heat Resistance maimum elt Speed (FT/Min)(1) General Application Normal HP Range Generic elt Type (Cross Sections) min. Ma. GeneralPurpose Heavy Duty Industrial Drives 15 6, Good 3 Super Gripbelt (A,, C, D) Longer Life, High Efficiency, Small Diameters 15 6, Ecellent 3 Gripnotch Multiple (A,, C) Very Good 3 HighPerformance, Compact Industrial Drives, Long C.D. 11 6, Gripbelts (3V, 5V, 8V) HighPerformance, Compact Industrial Drives, Short C.D. 16 6, Ecellent Gripnotch (3V, 5V) Special Order Serpentine Drives 12 6, Good DoubleV elts (AA,,CC, DD) Special Order 6, Fair Light Duty Drives Using a Single elt Light Duty FHP (2L, 3L, 4L, 5L) Notes: (1) Normally limited by sheave materials.

37 Section 2C Troubleshooting Environmental Problems Read and follow all instructions carefully. Disconnect and lockout power before installation and maintenance. Working on or near energized equipment can result in severe injury or death. Do not operate equipment without guards in place. Eposed equipment can result in severe injury or death. Periodic inspections should be performed. Failure to perform proper maintenance can result in premature product failure and personal injury. Environmental Protection can be as important for a Vbelt as for humans. This section deals with the effect of adverse environmental conditions on Vbelts and how you can minimize these effects. 35

38 Section 2C Troubleshooting Environmental Problems C1 Improper or prolonged storage can reduce service life considerably. Vbelts should be stored in a cool, dry place with no direct sunlight. On shelves, in boes or piles, the stack should be small enough to avoid ecess weight and distortion on the bottom belts. On pegs, the longer belts should be coiled in loops of suitable size to prevent distortion from the weight of the belt. The following guide provided by the RMA should be followed for optimum conditions: Guide to Maimum Number of Coilings of Velts of Storage elt Cross Section A, AA, 3V and elt Length (Inches) Under to to and up Under to to and up Under to to to and up Under to to to and up Number of Coilings* None None None None Number of Loops* , C, and 5V D E and 8V *One coiling results in three loops; two coilings result in five loops, etc. ** AA and are know as double angle or heagonal Vbelts. The pegs should be crescent shaped in crosssection to avoid compression set dents in the belts from sharp corners and the pegs should be sufficiently large in crosssection to avoid compression setting to sharp bends resulting from the weight of the hanging belts. It is recognized that belts are sometimes coiled in smaller loops than indicated in the above table, for packaging for shipment, but such packaging should not be for prolonged storage. 36

39 Section 2C Troubleshooting Environmental Problems C2 Ecessive heat. Standard construction Vbelts are compounded for moderate heat resistance and should give adequate service under normal conditions. elt temperature (not ambient or surrounding air temperature) is the determining factor when heat is a suspected cause of short belt life. As a general rule service life of a Vbelt is cut in half for every 35 F raise in belt temperature above 85 F. Evidence of heat may be the appearance of small cracks on the underside of the belt. What to do about ecessive heat: 1. Check for slippage (see key number A7) 2. Ventilate the drive or shield from heat source 3. Check to make sure the proper belt size is installed 4. Check the horsepower capacity of the drive C3 Ecessive oil Heat Cracks or grease. Standard construction Vbelts are compounded for moderate grease and oil resistance. However, an ecessive amount can cause softening, swelling and deterioration of the rubber compounds, as well as slippage. What to do about oil or grease: 1. When there is occasional eposure from spillage or leakage, the belts and sheave grooves should be cleaned with a miture of detergent and water after the drive has been turned off and locked out and the cause of the leakage corrected. 2. When belts cannot be protected from oil, specially compounded oilresistant Vbelts should be used. 37

40 Section 2C Troubleshooting Environmental Problems C4 Never apply socalled belt dressings to Vbelts. These compounds are usually made from a petroleum derivative and can have a destructive effect on rubber compounds and other components of the belt. If belts slip, check for adequate tension and/or worn sheave grooves (see A4, A7). C5 Abrasive conditions from sand, dust or grit can accelerate wear of both belts and sheaves. This is especially true when slippage is present. elt selection can be an important factor. Eperience has shown that rawedge constructions Abrasive Wear reduce this wear because they reduce the sandpapereffect caused by slippage. Drive should be wellshielded against ecessive abrasive particles as much as possible. C6 Foreign objects, such as wood chips, can create havoc with Vbelt drives. elt breakage and turnover are the most common symptoms. Shielding the drive is a necessity. elt guards with epanded metalscreening are often used, but ventilation is sometimes sacrificed, possibly requiring additional induced cooling. anding belts are often effective, since they eliminate belt turnover. C7 Ecessive moisture can penetrate the fabric covering of a Vbelt, causing deterioration. In addition, a large amount of water can reduce friction and cause slippage. elt drives should be protected as much as possible when used outside or when subject to spray from washdown hoses, etc. elt tension should be inspected regularly. 38

41 Troubleshooting Design Problems Section 2D Read and follow all instructions carefully. Disconnect and lockout power before installation and maintenance. Working on or near energized equipment can result in severe injury or death. Do not operate equipment without guards in place. Eposed equipment can result in severe injury or death. Periodic inspections should be performed. Failure to perform proper maintenance can result in premature product failure and personal injury. When normal corrective measures, as presented in the previous sections, do not seem to produce the desired results, an inherent design problem may be the culprit. The solutions to these are best left up to the rowning Application Engineering Department or a Certified Drive Specialist. However, the discussion presented in this section will help identify symptoms caused by design problems. 39

42 4 Troubleshooting Design Problems Section 2D D1 Underbelting a drive, (using fewer belts than recommended by good design practice) results in ecessive tension in each belt on the drive. This is commonly evidenced by ecessive stretching which requires frequent takeups to prevent slippage. Another warning sign can be repeated belt breakage. In many cases, underbelting can be corrected simply by using raw edge, cogged Vbelts which have a higher horsepower rating. When these are used, drives should be identified to assure that future replacements are made with this type of belt. (Drive labels are available for this purpose.) D2 Drive overbelting, while usually resulting in longer Vbelt life, can be just as serious as underbelting. The symptoms most commonly found are overheated bearings and bent shafts. This is especially true if belt tensioning devices are used without regard to design factors. These devices, called tensioncheckers, are quite helpful in determinimg proper belt tension, but tension values taken from published tables do not apply to all drives. Therefore, when these devices are used the deflection force values should be calculated, rather than taken from such tables. Contact rowning Application Engineering, , for proper tensioning values. Tensioning devices measure the individual belt tensions; so, when too many belts are on the drive, the total tension can be ecessive when table values are used. On the other hand, when too few belts are on the drive, tension values from these tables may be inadequate. Most design handbooks contain the formulas and procedures for making these simple calculations. Another notsocommon symptom is belt vibration, resulting from tension harmonics. Since induced vibration can be caused by several factors, this should be referred to rowning Application Engineering.

43 Troubleshooting Design Problems Section 2D D3 When sheaves are too small for the belt crosssection, the belt flees beyond its normal limits. This is usually evidenced by cracks on the underside of the belt. Table A indicates the minimum recommended sheave diameter for fleing each belt crosssection. In most cases, use of a rawedge cogged belt will improve service life greatly, due to its greater fleibility. Table A. Minimum Recommended Sheave and Idler Diameters. Velt Cross Section Minimum P.D. Sheave or Inside Idler Minimum.D. Flat ackside Idler* A C D E A C V 2.6 5V 7. 5V 4.3 8V V 11.2 *Note: ackside idlers are detrimental to Vbelt service life. Another problem caused by sheaves that are too small is overheating of motor bearings, or even bent shafts. NEMA publishes minimum recommended sheave diameters for use with electric motors to avoid ecessive bearing loads. Table shows these minimums for the most common motor types. D4 Insufficient wrap on the small sheave can require ecessive belt tension to prevent slippage. This condition may require redesign, either using more belts, increasing the center distance or using a backside idler with longer belts. This is again a matter for rowning Application Engineering. 41

44 Troubleshooting Design Problems Table. Application of Velt Sheave Dimensions to GeneralPurpose Motors Section 2D Frame No. 143T 145T 182T 182T 184T 184T 184T 213T 215T 215T 254T 254T 256T 256T 284T 284T 286T 324T 326T 364T 364T 365T 365T 44T 44T 44T 45T 45T 45T 444T 444T 444T 444T 445T 445T 445T 445T IntegralHorsepower Motors Polyphase Induction Horsepower at Synchronous Speed, Rpm / /2 7 1/ / / *NEMA Standard, MG / / / /2 3/ / / Velt Sheave (Inches) Conventional A,, C, D, & E Minimum Pitch Diameter, Inches Narrow 3V, 5V & 8V Minimum Outside Diameter, Inches

45 Troubleshooting Design Problems Section 2D D5 ackside idlers can create problems because they cause Vbelts to bend opposite to the way they were designed. Care must be taken to see that a backside idler is large enough in diameter to reduce harmful stresses, which often cause cracks on the underside of the belt. Table A (under D3) also shows these minimum recommended diameters. 43

46 Design and Installation Suggestions Section 2E rowning Gripbelt "V" Drives are primarily intended for the transmission of power with relatively high speed driving units. Their acceptance by industry covers a broad field of applications including installations on a wide variety of different types of equipment, including speed increasing drives, Vflat drives, quarterturn drives, multiple shaft drives and conveyors. Many such applications are regularly being designed and installed using stock parts. Regardless of whether drives consist of stock or special items there are certain primary conditions to consider with respect to the design of satisfactory drives. Those most commonly encountered are: 1. Drives should always be installed with provision for center distance adjustment. This is essential, because an adjustment is necessary after the belt has set and seated properly in the groove of the sheave. If centers must be fied, idlers should be used. 2. If possible, centers should not eceed 3 times the sum of the sheave diameters nor be less than the diameter of the large sheave. 3. If possible, the arc of contact of the belt on the smaller sheave should not be less than elt speeds with cast iron sheaves cannot eceed 65 feet per minute. Another type of drive is usually more desirable for speeds under 1 feet per minute. 5. Special or dynamic balance may need consideration for belts speeds eceeding 5 feet per minute. 6. Full consideration and allowance for overload capacity in drives increases belt life and improves operation. Study the Overload Service Factors in this section carefully. 7. Severe temperature can have a major effect on belt life. There should be a full and free circulation of air around the drive. All drives operating in eplosive atmospheres should be well grounded and use static conducting belts. 44

47 Design and Installation Suggestions Section 2E Watch these points particularly when installing drives: 1. e sure that shafts are parallel and sheaves are in proper alignment. Check after eight hours of operation. 2. Do not drive sheaves on or off shafts. e sure shaft and keyway are smooth and that bore and key are of correct size. Remove burrs by dressing lightly with finishing file. Wipe shaft, key and bore clean with oil. Tighten screws carefully. Recheck and retighten after eight hours of operation. 3. elts should never be forced over sheaves. More belts are broken from this cause than from actual failure in service. See Table No. 1 and 1A on page 38 and In mounting belts, be sure that the slack in each and every belt is on the same side of the drive. This should be the slack side of the drive. 5. elt tension should be reasonable. When in operation the tight side of belts should be in a straight line from sheave to sheave and with a slight bow on the slack side. Check belt tension after eight hours of operation. All drives should be inspected periodically to be sure belts are under proper tension and not slipping. For more detailed tensioning instructions and an inepensive tension checker, see page Do not install new sets of belts in drives where the sheaves have worn grooves. Such sheaves should be replaced with new sheaves to insure a proper fit of the belts in the grooves, thus elimination possibility of premature belt failure. 7. Keep belts clean. Do not use belt dressing. 8. When making replacement of belts on a drive, be sure to replace the entire set with a new set of matched belts. Failure to do this will probably result in premature breakage of new (and probably shorter) belts mied with old ones. 9. Keep etra belts stored in a cool, dark, dry place. Caution Install guards according to local and national codes. 45

48 Design and Installation Suggestions Section 2E Table No. 1 Minimum Center Distance Allowance for elt Installion and TakeUp elt No. Allowance for Installation Allowance for Initial Tensioning and Subsequent TakeUp A C D All Sections and over / 2 % of elt Length 46

49 Design and Installation Suggestions Section 2E Table No. 1A Minimum Center Distance Allowance for elt Installion and TakeUp elt No. Allowance for Installation Allowance for Initial Tensioning and Subsequent TakeUp 3V 5V 8V All Sections

50 Section 2F Gripbelt Drive Engineering Data asic Drive Selection Procedure Selections are based on horsepower ratings for single belt and are not corrected for arc of contact, belt length or ratio. Selections based on a 1. service factor. Drive calculations based on motor or smaller sheave operating at 175 RPM. 48 Application characteristics: Low horsepower For single groove low horsepower application (under 3 HP) Ideal for fan applications FHP (Fractional Horsepower) Vbelts Pitch Dia. 1.25* HP Rating elt Type 3L Pitch Dia. 1.25* 1.5* 2.* elt Type 4L HP Rating Pitch Dia. 2.2* 2.5* 3.* HP Rating elt Type 5L * elow RMA minimum recommended pitch diameter. Note: For speeds not shown on this page, use tables on pages Drives must be corrected for loss in arc of contact.

51 Section 2F Gripbelt Drive Engineering Data asic Drive Selection Procedure Selections are based on horsepower ratings for single belt and are not corrected for arc of contact, belt length or ratio. Selections based on a 1. service factor. Drive calculations based on motor or smaller sheave operating at 175 RPM. Application characteristics: Medium horsepower For industrial applications requiring single or multiple Vbelt drives Transmits more horsepower and has longer life epectancy than FHP Vbelts Suited for "clutching" applications. A, and C Type Velts elt Type A Pitch Dia. 2.* HP Rating.9 2.2* * elt Type elt Type C Pitch Dia. HP Rating Pitch Dia. 5.6 HP Rating * * * * * * * * * elow RMA minimum recommended pitch diameter. Note: For speeds not shown on this page, use tables on pages Drives must be corrected for loss in arc of contact. 5.* *

52 Gripbelt Drive Engineering Data Section 2F asic Drive Selection Procedure Selections are based on horsepower ratings for single belt and are not corrected for arc of contact, belt length or ratio. Selections based on a 1. service factor. Drive calculations based on motor or smaller sheave operating at 175 RPM. 5 Application characteristics:medium/high horsepower For industrial applications requiring single or multiple Vbelt drives Raw edge, cogged Transmits more horsepower than comparable A,, and C belts Raw edge design provides more aggressive gripping with less belt slippage Cogged construction allows belt fle easier around drive sheave and run cooler than noncogged belts Not for use on (clutching) applications because of aggressive grip A, and C Type Velts Pitch Dia. 2.* HP Rating 1.24 elt Type A * 4.62 Pitch Dia. HP Rating 3.* 3.72 Pitch Dia. 5.6* HP Rating 14.1 elt Type elt Type C * elow RMA minimum recommended pitch diameter. Note: For speeds not shown on this page, use tables on pages Drives must be corrected for loss in arc of contact.

53 Gripbelt Drive Engineering Data Section 2F asic Drive Selection Procedure Selections are based on horsepower ratings for single belt and are not corrected for arc of contact, belt length or ratio. Selections based on a 1. service factor. Drive calculations based on motor or smaller sheave operating at 175 RPM. Application characteristics:high horsepower For industrial applications requiring single or multiple Vbelt drives Transmits substantially more horsepower than A, A,,, C and C, which allows for more compact drive systems (smaller sheave O.D. and/or fewer grooves) Raw edge, cogged 3V and 5V Type Velts Pitch Dia HP Rating 1.37 elt Type 3V Pitch Dia. 4.3 HP Rating 8.23 elt Type 5V * elow RMA minimum recommended pitch diameter. Note: For speeds not shown on this page, use tables on pages Drives must be corrected for loss in arc of contact. 51

54 Gripbelt Drive Engineering Data Overload Service Factors Section 2F Load and operating characteristics of both the driving and driven units must be considered thoroughly in the selection of rowning Gripbelt Drives. It is essential that all drives be designed for maimum load conditions to be encountered. Most drives will at some time be overloaded, perhaps only momentarily. It is good practice to have predetermined drive capacity to handle this overload. This predetermined drive capacity helps protect against breakdowns due to premature belt failure. The use of an etra belt will pay for itself many times over by increasing the life of all the belts more than the proportionate cost of the etra belt. For good design and satisfactory drive life all drives must be selected with careful consideration to two fundamental conditions: 1. The motor must have greater capacity than the driven unit. 2. The drive must have greater capacity than the motor. A careful consideration of Overload Service Factors for various types of driven units, drivers, type of starting, frequency of maintenance and other drive conditions is etremely important for satisfactory performance and life. The following tables on page 45 are suggested Overload Service Factors for various typical driven units.! Drives requiring high Overload Service Factors, such as crushing machinery, certain reciprocating compressors, etc. subjected to heavy shock load without suitable fly wheels, may need heavy duty web type sheaves rather than standard arm type. For any such application, consult Application Engineering. 52 CAUTION

55 Gripbelt Drive Engineering Data Suggested Overload Serice Factors for Typical Applications DRIVING UNITS 1 TYPES OF DRIVEN MACHINES TYPES OF DRIVEN MACHINES Section 2F AC Motors; Normal Torque, SquirrelCage, Synchronous and Split Phase. DC Motors; Shunt Wound. Multiple Cylinder Internal Combustion Engines. Intermittent (35 Hours Daily or Seasonal) DRIVING UNITS 2 AC Motors; High Torque, High Slip, RepulsionInduction, Single Phase, Series Wound and Slip Ring. DC Motors; Series Wound and Compound Wound. Single Cylinder Internal Combustion Engines. Line Shafts. Clutches. Intermittent (35 Hours Daily or Seasonal) Normal (81 Hours Daily) Normal (81 Hours Daily) Continuous (1624 Hours Daily) lowers and Ehausters Pumps and Compressors Fans up to 1 HP Fans Over 1 HP Positive Displacement Rotary Pumps Positive Displacement lowers Continuous (1624 Hours Daily) lowers and Ehausters Pumps and Compressors Fans up to 1 HP Fans Over 1 HP Positive Displacement Rotary Pumps Positive Displacement lowers A minimum Service Factor of 2. is suggested for equipment subject to chocking. Service factor should be increased by.2 on drive units with a increaser drive speed of 22 RPM or lower when using a 175 RPM motor. This is a speedup ratio of 1.25 or less. For speed increaser drives or speedup drives greater than 22 RPM, the recommendation is to use a 2. service factor. 53

56 Gripbelt Drive Engineering Data Datum System Section 2F In December, 1987, RMA/MPTA adopted Standard IP This standard supersedes IP21977 and affected the A,, C, and D belts and sheaves. Those products in this catalog are in accordance with IP21988 which incorporates the Datum Diameter System. The Datum System specifies the Datum Diameter as the effective diameter for determining the pitch length of the belt for center distance calculation. In this catalog, Datum Diameter (D.D.) is now listed for the A,, C, and D sheaves and is equal to the old Pitch Diameter (P.D.) shown in previous catalogs. elt Velocity elt velocity is not needed for calculation of drives, as the horsepower ratings shown are based on the R.P.M. of the sheave. If belt velocity is desired for any reason, use the formula: elt Velocity in Feet per Minute (FPM) = D.D. or P.D. of Sheave.2618 Speed of Sheave (RPM) Cast Iron Sheaves must not be used beyond 65 FPM belt speed. Since the majority of stock sheaves are made of cast iron, we list no ratings above 65 FPM. Some types of belts lose ratings before they reach 65 FPM and other types continue to increase beyond 65 FPM. The asic Rating Tables and the Drive Selection Tables reflect these variations. Special alance Functionally, speeds up to 65 FPM are acceptable; however, on applications where vibration requirements are critical, special balancing (usually dynamic) for speeds above 5 FPM may be considered. Factors to be considered for special balance requirements are: rigidity of drive mounting, whether noise created by a level of vibration would be prohibitive, etc. Many drives are in service running at speeds up to 65 FPM without special balancing. 54

57 Gripbelt Drive Engineering Data Center Distance and elt Length Interpolation For every inch of belt length difference there is approimately 1/2 inch center distance change. All belt numbers reflect a relation if it is pitch length, outside length or inside length. An A26 belt is 2" longer than an A24 belt; a 15 belt is 15" longer than a 9 belt; a 3V335 belt is 8.5" longer than a 3V25 belt, etc. Interpolation eample: If an A128 belt gives 5." C.D. and an A96 gives 34. C.D., then an A112 belt gives 42. C.D. If a 5V12 belt gives 83.1" C.D. and a 5V16 gives 63.1 C.D., then a 5V18 belt gives 73.1 C.D. Center distance and belt lengths determined by interpolation are usually close enough as all drives should provide for takeup as indicated on pages 38 and 39. If closer calculation is necessary for any reason use the following formula: (D d) 2 L = 2C (D + d) + 4C where: L = Pitch Length of elt C = Center Distance D = Datum or Pitch Diameter of Large Sheave d = Datum or Pitch Diameter of Small Sheave Section 2F 55

58 Gripbelt Drive Engineering Data Driven Speed Variations Section 2F All Velt Drives will vary slightly from the speeds shown in the Drive Selection Tables. These variations are due to different motor speeds depending on load, changing frequencies (on A.C. Motors) or voltage (on D.C. Motors), varying tensions and resulting slip, and allowable manufacturing tolerances in belts and sheaves. Also, actual sheave pitch diameters and actual belt pitch lines have been changed slightly over the years by all manufactures but catalog data has not been changed to reflect this. In the few instances where very close speed tolerances are required, contact Application Engineering for assistance or use the rowning EDGE Selection Program. SpeedUp, QuarterTurn, and VFlat Drives These drives occur infrequently and should be referred to rowning for special design considerations. 56

59 Section 2F Gripbelt Drive Engineering Data Table No. 1 HP elt Section Selection Chart elt Section 1/2 A A 3/4 A A 1 A A 1 1/2 A A 2 A A 3 A A 5 A A 7 1/2 5V 3V 1 5V, 3V A 15 5V, 3V A 2 5V 3V 25 5V 3V 3 5V 3V 4 5V, 5V 5 5V, 5V C 6 5V, 5V C 75 5V, 5V C C 1 5V, 5V C C 125 5V, 5V C C 15 5V, 5V C C 2 5V, 5V C 25 5V, 5V C The best drive will usually be found by using elt Section from the first column. If, for any reason, such as sheave shortage, this drive is not suitable, go to the net column. "A" drives are found in the "A" Drive Selection Tables; "" in the "" Tables, etc. 57

60 Gripbelt Drive Engineering Data Section 2F Correction Factor for elt Length Longer belts have greater horsepower ratings because of less frequent fleure around sheaves. Multiply H. P. ratings by appropriate factor from table below to get the final corrected horsepower. Table No. 1 Nominal Nominal A C Length Length A C D E The information on these two pages are included for technical support 58 in figuring nonstandard drives.

61 Gripbelt Drive Engineering Data Multiply H. P. ratings by appropriate factor from table below to get the final corrected horsepower. Table No. 2 Correction Factor for Loss in Arc of Contact The loss of arc of contact from 18 for different drives can be determined in the following manner: Loss in Arc of Contact (in degrees) = (D d) 57 C The Correction Factors for loss in arc of contact in degrees are; Table No. 3 Section 2F elt Cross Section elt Cross Section Length 3V 5V 8V Length 3V 5V 8V Loss in Arc Correction of Contact Factor Loss in Arc Correction of Contact Factor The information on these two pages are included for technical support in figuring nonstandard drives. 59

62 Gripbelt Drive Engineering Data Table No. 4 elt Selection Nominal elt Size Add to P.D. to get O.D. Minimum Recommended Pitch Diameter* Section 2F A 1/2 5/ /8 5/8 21/32 13/ /2 3/4 C 7/8 17/ /16 1 D 1 1/4 3/ /8 1 7/16 E 1 1/2 29/ /8 1 3/4 3V 3/8 5/ /32 13/32 5V 5/8 7/ /2 11/16 8V 1 7/ /4 1 1/8 * The minimum recommended pitch diameters listed above are RMA and MPTA Standards recommendations. Many sheaves with diameters smaller than these recommendations are made and used. If a rating for a subminimum diameter sheave is published in the selection tables and the drive is properly installed, it should give the same theoretical life as a drive using sheave diameters equal to or greater than the minimums shown above. C D The information on these two pages are included for technical support in figuring nonstandard drives. 6

63 Gripbelt Drive Engineering Data Section 2F 1 HP = 54" 116 RPM 1 HP = 36" 175 RPM FORCE FPM HP = 33, HP = HP = T " lbs. RPM 63,25 T ' lbs. RPM 5,252 63,25 HP T " lbs. = RPM 5,252 HP T ' lbs. = RPM FPM =.2618 DIA. RPM 63,25 HP RPM = TORQUE T F = = FORCE LEVER ARM TORQUE RADIUS FPM RPM =.2618 DIA. 2TK OL = D K = 1. for Chain Drives 1.25 for Gear Drives 1.25 for Gearbelt Drives 1.5 for Velt Drives 2.5 for Flat elt Drives LINEAL SHAFT EPANSION =.63 length in inches temperature inc. in degrees F KW = HP.7457 IN. = MM/25.4 TEMP C = ( F32).556 Kg = LS 2.25 The information on these two pages are included for technical support in figuring nonstandard drives. 61

64 Gripbelt Drive Engineering Data Tensioning elt Drives General rules of tensioning. Section 2F 1. Ideal tension is the lowest tension at which the belt will not slip under peak load conditions. 2. Check tension frequently during the first hours of operation. 3. Over tensioning shortens belt and bearing life. 4. Keep belts free from foreign material which may cause slip. 5. Make Vdrive inspection on a periodic basis. Tension when slipping. Never apply belt dressing as this will damage the belt and cause early failure. Small oring Force scale Table No. 1 FHP elts Deflection Force Cross Section 3L Small P.D. Range Lbs Min. Ma. 1/2 5/8 3/4 5/8 7/8 1 1/8 Large oring Span scale 4L 5L /8 1/2 1 7/ /8 1 5/8 2 1/8 2 5/8 2 7/8 3 3/8 Part Number "elt Tension Checker" 62

65 Gripbelt Drive Engineering Data Tension Measurement Procedure 1. Measure the belt span (see illustration below). 2. Position bottom of the large oring on the span scale at the measured belt span. 3. Set the small oring on the deflection force scale to zero. 4. Place the tension checker squarely on one belt at the center of the belt span. Apply a force on the plunger and perpendicular to the belt span until the bottom of the large oring is even with the top of the net belt or with the bottom of a straight edge laid across the sheaves. 5. Remove the tension checker and read the force applied from the bottom of the small oring on the deflection force scale. 6. Compare the force you have applied with the values given in Table No. 2 on page 56. The force should be between the minimum and maimum shown. The maimum value is shown for "New elt" and new belts should be tensioned at this value to allow for epected tension loss. Used belts should be maintained at the minimum value as indicated in Table No.2 on page 56. Note: The ratio of deflection to belt span is 1:64. Section 2F ELT SPAN DEFLECTION = 64 ELT SPAN The above method of tensioning belt drives is to be used when a drive has been selected in accordance with the suggestions listed in the drive selection tables of the HVAC catalog. For drives with service factor greater than 1.5, consult Application Engineering. For eact tension calculations use the EDGE selection program. 63

66 Gripbelt Drive Engineering Data Table No. 2 Sheave Diameter Inches Cross Section A, A, C, C D 3V, 3V 5V, 5V 8V Smallest Sheave Diameter Range Section 2F RPM Range

67 Gripbelt Drive Engineering Data Section 2F Deflection Force Lbs. elt Deflection Force Super Gripbelts and Gripnotch elts and Unotched Gripbands Notched Gripbands Used elt New elt Used elt New elt

68 Velt Drive Advantages Vbelt drives provide many maintenance advantages that help in your daily struggle to reduce equipment repairs and to hold forced downtime to the lowest possible level. 1. They are rugged they will give years of troublefree performance when given just reasonable attention... even under adverse conditions. 2. They are clean require no lubrication. 3. They are efficient performing with an average of 94 98% efficiency. 4. They are smooth starting and running. 5. They cover etremely wide horsepower ranges. 6. They permit a wide range of driven speeds, using standard electric motors. 7. They dampen vibration between driving and driven machines. 8. They are quiet. 9. They act as a safety fuse in the power drive because they refuse to transmit a severe overload of power, ecept for a very brief time. 1. Vbelts and sheaves wear gradually making preventive corrective maintenance simple and easy. 358 Gripbelt Gripnotch Gripbelt 66

69 Offers the largest selection of Velts in the universe! rowning is universally known for Vbelt drives. In fact, nowhere else can you find such a complete range of Vbelting and the sheaves to run them all in stock. Choose the type that's best for your application Classical, "358" and FHP. Matched elts And there's no problem with matched belt sizes either. rowning offers the "CODE 1" onematch belt system on all classical and "358" belts, allowing easy selection with just one match number for each belt size. The CODE 1 symbol on any rowning belt provides matching tolerances tighter than ANSI (American National Standards Inc.). Machine matching of belts is also available for precision match requirements. Wherever you are in the universe make rowning your first choice in Vbelts. Note: elt matching is available upon request. The product will ship from our National Distribution Center. Super Gripbelt VS Variable Speed Gripbelt 67

70 68 Super Gripbelt Table No. 1 Super Gripbelt belts are static conducting. elt Length Wt. elt Length Wt. No. Outside Pitch Lbs. No. Outside Pitch Lbs. A A6 62.2" 61.3".4 A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A

71 Super Gripbelt Table No. 2 Super Gripbelt belts are static conducting. elt Length Wt. elt Length Wt. No. Outside Pitch Lbs. No. Outside Pitch Lbs. A " 14.3" A A A A A A A A A A A " 52.8"

72 7 Super Gripbelt Table No. 3 Super Gripbelt belts are static conducting. elt Length Wt. elt Length Wt. No. Outside Pitch Lbs. No. Outside Pitch Lbs " 91.8" " 225.3" C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C

73 Super Gripbelt Table No. 4 Super Gripbelt belts are static conducting. elt No. Outside Length Pitch Wt. Lbs. C " 197.9" 3.7 C C C C C C C C C C C C C D D D D D D D D D D D D D D D D D D D D D D D D D D

74 72 Gripnotch elts Table No. 1 Precision molded raw edge conctruction More horsepower in less space Notches are molded etra deep Oil and heat resistant Static conducting elt Length Wt. elt Length Wt. No. Outside Pitch Lbs. No. Outside Pitch Lbs. A A6 62.2" 61.3".4 A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A

75 Gripnotch elts Table No. 2 Precision molded raw edge conctruction More horsepower in less space Notches are molded etra deep Oil and heat resistant Static conducting elt Length Wt. elt Length Wt. No. Outside Pitch Lbs. No. Outside Pitch Lbs. A1 12.2" 11.3" A A A A A A A A A A

76 Gripnotch elts Table No. 3 Precision molded raw edge conctruction More horsepower in less space Notches are molded etra deep Oil and heat resistant Static conducting elt Length No. Outside Pitch Wt. Lbs " 98.8" C C C

77 Gripnotch elts Table No. 4 Precision molded raw edge conctruction More horsepower in less space Notches are molded etra deep Oil and heat resistant Static conducting elt Length No. Outside Pitch Wt. Lbs. C C " 74.9" 1.4 C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C D D D D D D

78 76 FHP elts Wrapped construction provides smooth, quiet operation Formulated for maimum fleibility with smaller diameter sheaves Table No. 1 Oil and heat resistant static conducting elt Length Wt. elt Length Wt. No. Outside Pitch Lbs. No. Outside Pitch Lbs. 2L L38 38" 37.3".12 2L L L L L L L L L L L L L L L / L L L L L L L L / L L / L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L / L L L L L L L L L L L L L L

79 FHP elts Wrapped construction provides smooth, quiet operation Formulated for maimum fleibility with smaller diameter sheaves Table No. 2 Oil and heat resistant static conducting elt Length Wt. elt Length Wt. No. Outside Pitch Lbs. No. Outside Pitch Lbs. 4L3 3" 29".13 4L69 69" 68".38 4L L L L L L L L L L L L L L L L L L L L L L L / L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L

80 FHP elts Table No. 3 Wrapped construction provides smooth, quiet operation Formulated for maimum fleibility with smaller diameter sheaves Oil and heat resistant static conducting elt Length No. Outside Pitch Wt. Lbs. 5L31 31" 29.8".25 5L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L

81 FHP elts Table No. 4 elt No. Wrapped construction provides smooth, quiet operation Formulated for maimum fleibility with smaller diameter sheaves Oil and heat resistant static conducting Length Outside Pitch Wt. Lbs. 5L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L

82 "358" Gripbelts and Gripnotch Table No. 1 Oil and heat resistant More horsepower in less space Static conducting Part No. Outside Length Wt. Lbs. Part No. Outside Length Wt. Lbs. Part No. Outside Length Wt. Lbs 3V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V vV V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V

83 elts CrossReference 4L, A, A elts CrossReference Table 1 4L A A Length 4L A A Length 4L23 A21 A L63 A61 A L24 A22 A L64 A62 A L25 A23 A L65 A63 A L26 A24 A L66 A64 A L27 A25 A L67 A65 A L28 A26 A L68 A66 A L29 A27 A L69 A67 A L3 A28 A L7 A68 A L31 A29 A L71 A69 A L32 A3 A L72 A7 A L33 A31 A L73 A71 A L34 A32 A L74 A72 A L35 A33 A L75 A73 A L36 A34 A L76 A74 A L37 A35 A L77 A75 A L38 A36 A L78 A76 A L39 A37 A L79 A77 A L4 A38 A L8 A78 A L41 A39 A L81 A79 A L42 A4 A L82 A8 A L43 A41 A L83 A81 A L44 A42 A L84 A82 A L45 A43 A L85 A83 A L46 A44 A L86 A84 A L47 A45 A L87 A85 A L48 A46 A L88 A86 A L49 A47 A L89 A87 A L5 A48 A L9 A88 A L51 A49 A L91 A89 A L52 A5 A L92 A9 A L53 A51 A L93 A91 A L54 A52 A L94 A92 A L55 A53 A L95 A93 A L56 A54 A L96 A94 A L57 A55 A L97 A95 A L58 A56 A L98 A96 A L59 A57 A L99 A97 A L6 A58 A L1 A98 A L61 A59 A A99 A L62 A6 A A1 A Substitutions can be made based on this chart only from left to right. Eample: 4L23 can be interchanged with an A21 or A21, but the A21 can not be substituted for the A21. 81

84 82 elts CrossReference 5L,, elts CrossReference Table 1 5L Length 5L Length 5L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L Substitutions can be made based on this chart only from left to right. Eample: 4L23 can be interchanged with an A21 or A21, but the A21 can not be substituted for the A21.

85 A Complete Selection of rowning Products Leads to the Right Velt for Every Application The rowning line offers the most etensive Vdrive line available anywhere, which means maimum economy versatility and prompt availability for your every application...truly the right drive every time...for every service. New combination groove 5V with 17 plus components covering 1125 HP range. Mi and match with conventional A, and 5V components. Cast iron sheaves over 3 AK/K size and bore combinations in stock, inshaft ready bushing type and finished bore. Variable speed sheaves through 75 HP, precision balanced to provide smooth vibrationfree performance. 5V Sheaves Variable Speed Sheaves VP, VL, VM Cast Iron Sheaves AK, 2AK, AKH, 2AKH K, 2K, KH, 2KH H ushing 83

86 Cast Iron Sheaves AK Wt. Lbs Single Groove Sheaves for 4L or A elts 3L belts may also be used with these sheaves as indicated in table below. 84 Table 1 Stock Sizes Finished ore DIAMETER STOCK ORES MARKED 1/2 5/8 3/4 7/8 15/ /8 1 3/16 1 1/4 1 3/8 1 7/16 Pitch 3L Outside Datum A Part No s AK17 s AK2 s AK21 s AK22 s AK23 s AK25 s AK26 s AK27 s AK28 s AK3 s AK32 s AK34 AK39 AK41 AK44 AK46 AK49 AK51 AK54 AK56 Note Do not use these AK sheaves with bores 1 and under with gripnotch belt ratings.

87 Cast Iron Sheaves AK Wt. Lbs. Single Groove Sheaves for 4L or A elts (continued) 3L belts may also be used with these sheaves as indicated in table below. Table 1 Stock Sizes Finished ore (continued) DIAMETER STOCK ORES MARKED 1/2 5/8 3/4 7/8 15/ /8 1 3/16 1 1/4 1 3/8 1 7/16 Pitch 3L Outside Datum A Part No AK59 AK61 AK64 AK66 AK69 AK71 s AK74 s AK79 s AK84 s AK89 s AK94 s AK99 sak14 s AK19 s AK114 s AK124 AK134 AK144 AK154 AK184 Note Do not use these AK sheaves with bores 1 and under with gripnotch belt ratings. 85

88 Cast Iron Sheaves 2AK Wt. Lbs Two Groove Sheaves for 4L or A elts 3L belts may also be used with these sheaves as indicated in table below. 86 Table 1 Stock Sizes Finished ore DIAMETER STOCK ORES MARKED 1/2 5/8 3/4 7/8 15/ /8 1 3/16 1 3/8 1 7/16 Pitch 3L Datum A Outside Part No AK2 2AK21 2AK22 2AK23 2AK25 2AK26 2AK27 2AK28 2AK3 2AK32 2AK34 2AK39 2AK41 2AK44 2AK46 2AK49

89 Cast Iron Sheaves 2AK Two Groove Sheaves for 4L or A elts (continued) 3L belts may also be used with these sheaves as indicated in table below. Wt. Lbs. Table 1 Stock Sizes Finished ore (continued) DIAMETER STOCK ORES MARKED 1/2 5/8 3/4 7/8 15/ /8 1 3/16 1 3/8 1 7/16 Pitch 3L Datum A Outside Part No AK51 2AK54 2AK56 2AK59 2AK61 2AK64 2AK74 2AK84 2AK94 2AK14 2AK114 2AK124 2AK134 2AK144 2AK154 2AK184 87

90 88 Cast Iron Sheaves Single Groove Sheaves for 4L or A elts 3L belts may be used with these sheaves as indicated in table below. Table 1 Stock Sizes with Split Taper ushings Part DIAMETER No. O.D. Datum A Pitch 3L AK3H AK32H AK34H AK39H AK41H AK44H AK46H AK49H AK51H AK54H AK56H AK59H AK61H AK64H AK66H AK69H AK71H AK74H AK79H AK84H AK89H AK94H AK99H AK14H AK19H AK114H AK124H AK134H AK144H AK154H AK184H Part numbers are specified by H and bore size. Eample: H1 1/8 *These sizes are furnished with special keys to fit standard depth keyseats. AKH Wt. Less ush Table 2 Stock H ushings Inch ore Millimeter ore Stock Spline ores Stock ores Keyseat Stock ores Keyseat Stock ores Keyseat 3/8, 7/16 None 1 mm None Inv. 1/2, 9/16 1/8 1/16 11, 12 None 1 1/8 6 5/8, 11/16, 3/4 3/16 3/ mm 2.5 mm 1 3/8 6 13/16, 7/8, 15/16 3/16 3/ /8 21 Inv. 1, 1 11/16 1/4 1/8 18, 19, 2, /8, 1 3/16 1/4 1/8 24, 25, 28, /4 1/4 1/16* 32, 35, 36, /16, 1 3/8 5/16 1/16* 1 3/8, 1 7/16, 1 1/2 3/8 1/16*

91 Cast Iron Sheaves 2AKH Two Groove Sheaves for 4L or A elts (continued) 3L belts may be used with these sheaves as indicated in table below. Table 1 Stock Sizes with Split Taper ushings Part DIAMETER No. O.D. Datum A Pitch 3L 2AK3H AK32H AK34H AK39H AK41H AK44H AK46H AK49H AK51H AK54H AK56H AK59H AK61H AK64H AK74H AK84H AK94H AK14H AK114H AK124H AK134H AK144H AK154H AK184H Wt. Less ush Table 2 Stock H ushings Inch ore Millimeter ore Stock Spline ores Stock ores Keyseat Stock ores Keyseat Stock ores Keyseat 3/8, 7/16 1/2, 9/16 5/8, 11/16, 3/4 None 1/8 1/16 3/16 3/32 1 mm 11, 12 14, 16 None None 5 mm 2.5 mm Inv. 1 1/ /8 6 13/16, 7/8 3/16 3/32 18, 19, 2, /8 21 Inv. 15/16, 1, 1 11/16 1 1/8, 1 3/16 1 1/4 1 5/16, 1 3/8 1/4 1/8 1/4 1/8 1/4 1/16* 5/16 1/16* 24, 25, 28, 3 32, 35, 36, /8, 1 7/16, 1 1/2 3/8 1/16* Part numbers are specified by H and bore size. Eample: H1 1/8 *These sizes are furnished with special keys to fit standard depth keyseats. 89

92 Cast Iron Sheaves K Wt. Lbs Single Groove Sheaves Combination Groove for 4L or A elts and 5L or elts 9 Table 1 Stock Sizes Finished ore DIAMETER STOCK ORES MARKED 1/2 5/8 3/4 7/8 15/ /8 1 3/16 1 1/4 1 3/8 1 7/16 Datum Outside Datum A Part No sk24 sk25 sk26 sk27 sk28 sk3 sk32 K34 K36 K4 K45 K47 K5 K52 K55 K57 K6 K62 K65 Note Do not use these K sheaves with gripnotch belt ratings.

93 Cast Iron Sheaves K Single Groove Sheaves (continued) Combination Groove for 4L or A elts and 5L or elts Wt. Lbs. Table 1 Stock Sizes Finished ore (continued) DIAMETER STOCK ORES MARKED 1/2 5/8 3/4 7/8 15/ /8 1 3/16 1 1/4 1 3/8 1 7/16 Datum Datum A Outside Part No K67 K7 K72 K75 K77 K8 K85 K9 K95 K1 K15 K11 K115 K12 K13 K14 K16 K19 Note Do not use these K sheaves with gripnotch belt ratings. 91

94 Cast Iron Sheaves 2K Wt. Lbs. Two Groove Sheaves Combination Groove for 4L or A elts and 5L or elts Table 1 Stock Sizes Finished ore DIAMETERS STOCK ORES MARKED Outside Datum A Datum 1/2 5/8 3/4 7/ /8 1 3/16 1 3/8 1 7/16 Part No K25 2K27 2K28 2K3 2K32 2K34 2K36 2K4 2K45 2K47 2K5 2K52 2K55 2K57 2K6 2K62 2K65 2K67 2K7 2K8 2K9 2K1 2K11 2K12 2K13 2K14 2K16 2K19

95 Cast Iron Sheaves Single Groove Sheaves Combination Groove for 4L or A elts and 5L or elts Table 1 Stock Sizes with Split Taper ushings Part DIAMETER No. O.D. Datum A Datum K3H K32H K34H K36H K4H K45H K47H K5H K52H K55H K57H K6H K62H K65H K67H K7H K72H K75H K77H K8H K85H K9H K95H K1H K15H K11H K115H K12H K13H K14H K15H K16H K19H KH Wt. Lbs. Less ush Table 2 Stock H ushings Inch ore Millimeter ore Stock Spline ores Stock ores Keyseat Stock ores Keyseat Stock ores Keyseat 3/8, 7/16 None 1 mm None Inv. 1/2, 9/16 1/8 1/16 11, 12 None 1 1/8 6 5/8, 11/16, 3/4 3/16 3/32 14, 16 5 mm 2.5 mm 1 3/8 6 13/16, 7/8 3/16 3/32 18, 19, 2, /8 21 Inv. 15/16, 1, 1 11/16 1/4 1/8 24, 25, 28, /8, 1 3/16 1/4 1/8 32, 35, 36, /4 1/4 1/16* 1 5/16, 1 3/8 5/16 1/16* 1 3/8, 1 7/16, 1 1/2 3/8 1/16* Part numbers are specified by H and bore size. Eample: H1 1/8 *These sizes are furnished with special keys to fit standard depth keyseats. 93

96 Cast Iron Sheaves Two Groove Sheaves Combination Groove for 4L or A elts and 5L or elts 2KH Table 1 Stock Sizes with Split Taper ushings Part DIAMETER Wt. Lbs. No. O.D. Datum A Datum Less ush. 2K32H K34H K36H K4H K45H K47H K5H K52H K55H K57H t K6H K62H K65H K67H K7H K8H K9H K1H K11H K12H K13H K14H K16H K19H Table 2 Stock H ushings Inch ore Millimeter ore Stock Spline ores Stock ores Keyseat Stock ores Keyseat Stock ores Keyseat 3/8, 7/16 None 1 mm None Inv. 1/2, 9/16 1/8 1/16 11, 12 None 1 1/8 6 5/8, 11/16, 3/4 3/16 3/32 14, 16 5 mm 2.5 mm 1 3/8 6 13/16, 7/8 3/16 3/32 18, 19, 2, /8 21 Inv. 15/16, 1, 1 11/16 1/4 1/8 24, 25, 28, /8, 1 3/16 1/4 1/8 32, 35, 36, /4 1/4 1/16* 1 5/16, 1 3/8 5/16 1/16* 1 3/8, 1 7/16, 1 1/2 3/8 1/16* Part numbers are specified by H and bore size. Eample: H1 1/8 *These sizes are furnished with special keys to fit standard depth keyseats. 94

97 Stock Sheave Interchange Sheaves for 4L, A, 5L or elts 4L or A 5L or rowning Maurey* Other Manufacturers T.. Dodge* Wood s* Maska* K 3H K 32H K 34H K 36H K 4H H 4 H 31 QT H 33 QT H 35 QT H 37 QT H 39 QT K 3H K 32H K 34H K 36H K 4H ML 31 ML 33 ML 35 ML 37 ML K 45H K 47H K 49H K 52H K 55H H 42 H 44 H 48 H 5 H 52 H 42 QT H 44 QT H 47 QT H 49 QT H 52 QT K 45H K 47H K 49H K 52H K 55H ML 42 ML 44 ML 47 ML 49 ML K 57H K 6H K 62H K 65H K 67H H 54 H 58 H 6 H 66 H 68 H 54 QT H 57 QT H 59 QT H 62 QT H 64 QT K 57H K 6H K 62H K 65H K 67H ML 54 ML 57 ML 59 ML 62 ML K 7H K 72H K 75H K 77H K 8H H 7 H 72 H 78 H 67 QT H 69 QT H 72 QT H 74 QT H 77 QT K 7H K 72H K 75H K 77H K 8H ML 67 ML 69 ML 72 ML 74 ML K 85H K 9H K 95H K 1H K 15H H 98 H 82 QT H 87 QT H 92 QT H 97 QT H 12 QT K 85H K 9H K 95H K 1H K 15H ML 82 ML 87 ML 92 ML 97 ML K 11H K 115H K 12H K 13H K 14H K 16H K 19H H 18 H 118 H 128 H 158 H 188 H 17 QT H 112 QT H 117 QT H 127 QT H 137 QT H 157 QT H 187 QT K 11H K 115H K 12H K 13H K 14H K 16H K 19H ML 17 ML 112 ML 117 ML 127 ML 137 ML 157 ML 187 * The following trade names, trademarks and/or registered trademarks are used in this material by Regal eloit Corporation for comparison purposes only, are NOT owned or controlled by Regal eloit Corporation and are believed to be owned by the following parties. Maury: Maury Manufacturing Corporation; T Wood s: T Wood s Incorporated; Dodge: aldor Electric Company 95

98 Gripbelt Sheaves with Split Taper ushings Specifications Stock 5V Sheaves Part Number DIAMETERS Wt. (lbs.) Sheave ushing Datum A elts Datum elts Pitch 5V elts Outside Less ush. 1 GROOVE, F = 1 15V42 15V44 15V46 15V48 15V5 15V52 15V54 15V56 15V58 15V6 15V62 15V64 15V66 15V68 15V7 15V74 15V8 15V86 15V9 15V94 15V11 15V124 15V136 15V154 15V16 15V184 15V2 15V234 15V25 15V278 P1 P

99 Gripbelt Sheaves with Split Taper ushings Specifications Stock 5V Sheaves continued Part Number DIAMETERS Wt. (lbs.) Sheave ushing Datum A elts Datum elts Pitch 5V elts I Outside Less ush. 2 GROOVE, F = 1 23/32 25V42 25V44 25V46 25V48 25V5 25V52 25V54 25V56 25V58 25V6 25V62 25V64 25V66 25V68 25V7 25V74 25V8 25V86 25V9 25V94 25V11 25V124 25V136 25V154 25V16 25V184 25V2 25V234 25V25 25V278 P1 P

100 Gripbelt Sheaves with Split Taper ushings Specifications Stock 5V Sheaves continued Part Number Diameters Wt. (lbs.) Sheave ushing Datum A elts Datum elts Pitch 5V elts Outside Less ush. 3 GROOVE, F = 27/16 35V42 35V44 35V46 35V48 35V5 35V52 35V54 35V56 35V58 35V6 35V62 35V64 35V66 35V68 35V7 35V74 35V8 35V86 35V9 35V94 35V11 35V124 35V136 35V154 35V16 35V184 35V2 35V234 35V25 35V278 P1 P

101 Gripbelt Sheaves with Split Taper ushings Specifications Stock 5V Sheaves continued Part Number DIAMETERS Wt. (lbs.) Sheave ushing Datum A elts Datum elts Pitch 5V elts Outside Less ush. 4 GROOVE, F = 3 5/32 45V42 45V44 45V46 45V48 45V5 45V52 45V54 45V56 45V58 45V6 45V62 45V64 45V66 45V68 45V7 45V74 45V8 45V86 45V9 45V94 45V11 45V124 45V136 45V154 45V16 45V184 45V2 45V234 45V25 45V278 P1 P

102 Variable Pitch Cast Iron Sheaves 1VP Single Groove Variable Pitch Sheaves for 3L, 4L, 5L, A,, and 5V elts Table 1 Stock Sizes Finished ore (inches) Part No. 1VP25 1P3 1VP34 1P4 1VP44 1VP44 OZ Stock ores Marked WL 1/2 5/8 3/4 7/ /8 1 1/4 1 3/8 1 5/8 Lbs VP VP VP VP VP VP VP VP * 6.4 1VP VP

103 Variable Pitch Cast Iron Sheaves 1VP Single Groove Variable Pitch Sheaves for 3L, 4L, 5L, A,, and 5V elts DIAMETER RANGE 3L ELTS 4L or A ELTS 5L OR ELTS 5V ELTS Min. Turns Ma. Turns Min. Turns Ma. Turns Min. Turns Ma. Turns Min. Turns Ma. Turns Pitch Open Pitch Open Pitch Open Pitch Open Pitch Open Pitch Open Pitch Open Pitch Open Table Part No VP25 1VP3 1VP34 1VP4 1VP44 1VP44 1VP5 1VP5 1VP56 1VP56 1VP6 1VP62 1VP65 1VP68 1VP71 1VP75 11

104 Variable Pitch Cast Iron Sheaves 2VP Two Groove Variable Pitch Sheaves for 3L, 4L, 5L, A,, and 5V elts 12 Table 1 Stock Sizes Finished ore (inches) Stock ores Marked Wt. 1/2 5/8 3/ / /8 15/5 Lbs. O.D. Part No VP36 2VP42 2VP5 2VP56 2VP6 2VP62 2VP65 2VP68 2VP71 2VP75

105 Variable Pitch Cast Iron Sheaves 2VP Two Groove Variable Pitch Sheaves for 3L, 4L, 5L, A,, and 5V elts Table 2 DIAMETER RANGE 3L ELTS 4L or A ELTS 5L OR ELTS 5V ELTS Part No. Min. Turns Ma. Turns Min. Turns Ma. Turns Min. Turns Ma. Turns Min. Turns Ma. Turns Pitch Open Pitch Open Pitch Open Pitch Open Pitch Open Pitch Open Pitch Open Pitch Open VP36 2VP42 2VP5 2VP56 2VP6 2VP62 2VP65 2VP68 2VP71 2VP All fitted with hollow head setscrews Any standard two groove rowning sheave can be used as a companion sheave

106 Variable Pitch Cast Iron Sheaves VL, VM Turns Open Table 1 Stock VL and VM Variable Pitch Sheaves 14 Stock ores Marked Wt. 1/2 5/8 3/4 7/8 Lbs. O.D. Part No. 1VL VL VL VL VL VM Table 2 DIAMETER RANGE 3L ELTS 4L or A ELTS 5L OR ELTS Part No. Ma. Pitch Turns Open Min. Pitch Turns Open Ma. Pitch Turns Open Min. Pitch Turns Open Ma. Pitch Turns Open Min. Pitch VL25 1VL3 1VL34 1VL4 1VL44 1VM

107 ushings Split Taper ushings Part No. ushing Specifications Dimensions ore Range Cap Screws D Large Small Type 1 Type 2 No. Size End End Av. Wt Lbs.. Wrench Torque InLbs. G /8 15/ /4 5/ H /81 3/8 1 7/161 1/2 2 1/4 3/ P /2 1 7/16 1 1/2 1 3/4 3 5/ P /4 1 7/16 1 1/2 1 3/4 3 5/ P /8 1 3/8 1 5/8 3 5/ /2 1 15/16 2/27/ /16 1 1/ Q /4 2 1/16 2 1/8 2 11/16 3 3/8 1 1/ Q /21/ /8 2 5/8 3 3/8 1 1/ Q /8 1/16 2 1/8 2 1/2 3 3/8 1 1/ R /8 2 13/16 2 7/8 3 3/4 3 3/8 1 3/ R /8 2 13/16 2 7/8 3 5/8 3 3/8 1 3/ S /16 3 3/16 3 1/4 4 1/4 3 1/2 2 1/ S /16 3 3/16 3 1/4 4 3/16 3 1/2 2 1/ UO /83 1/16 3 5/8 2 3/ UO /4 4 1/4 4 3/8 5 1/2 3 5/8 2 3/ U /8 4 1/4 4 3/8 5 1/2 3 5/8 2 3/ U /16 4 1/4 4 3/ /8 2 3/ W /8 6 3/16 6 1/4 7 7/16 4 3/ W /8 6 3/16 6 1/4 7 7/16 4 3/ Y* / R1 1 1/8, R1 1 3/16, R2 1 3/8, S1 1 11/16, S1 1 3/4, and S2 1 7/8" to 2 1/8" bushings are steel. U and U1 2 3/8" to 3 3/16" and U2 2 7/16" to 3 3/16" are cast iron. W and Y bushings are cast iron. All other bushings on this page are either sintered steel, malleable iron or ductile iron. Contact factory for clarification. Note: Taper on all rowning bushings is 3/4" per foot on diameter. *Y bushings are madetoorder. 15

108 earings Air Handling Solutions Mounted all earing Stamped Steel earing Rubber Mounted earing 16

109 Inde Page Mounted all earings...12 Stamped Steel/Rubber Mount earings...13 Air Handling Applications...14 Air Handling Solutions Locking Solutions Mounting Installation earing asics and FAQs Lubrication FAQs Air Handling Interchange Visit our online resources

110 Mounted all earings Available in a variety of housing configurations including pillow block, twobolt flange, fourbolt flange and more Semisolid cast iron base Antirotation rivet Available in set screw, eccentric and concentric (OA) locking AH suffi product designates special air handling housing fit and noise testing 18

111 Stamped Steel/Rubber Mounted Rubber Mounted Available in cartridges and stamped steel pillow blocks Designed to fit into HVAC webmount supports Cartridges adjust with misalignment and dampen noise and vibration Stamped Steel Low cost, stamped steel housings for lightduty HVAC requirements Well suited for small spaces Permanently sealed and lubricated for life for maintenancefree operation 19

112 Air Handling earing Applications Light Duty Light Commercial Duty Commercial Duty Industrial Duty rowning all rowning Runbber Mount rowning Stamped Steel 11

113 Air Handling earing Solutions Air Handling AH Option The rowning Air Handling mounted ball bearing has the same features as the standard rowning mounted ball bearing ecept for the following air handling features. AH Housing Fit Air Handling AH ball bearings are manufactured with a controlled housing fit that allows the bearing to properly selfalign when mounted on lightweight frames commonly found on air handling equipment. Noise Test All Air Handling AH bearings must pass a two stage noise testing verification for quiet operation to meet the noise level standards of the air handling industry. Popular shaft sizes and housing configurations in the normal and medium duty series are available offtheshelf these air handling features (designated by the AH suffi). These products are offered in both setscrew and OA concentric locking. 111

114 Air Handling earing Solutions Zone Hardening Inner Race rowning incorporates a unique heat treat process that hardens the inner race only where it is needed...under the ball path. The zone hardened inner race results in improved lock reliability as a result of less distortion at setscrew location and improved thread conformity resulting in improved clamping and resistance to setscrew backout. SemiSolid Cast Iron ase The rugged base design provides an ecellent mounting foundation. This is integral to prevent sheet metal buckling 112

115 Air Handling earing Solutions AntiRotation Rivet An antirotation rivet prevents outer ring creep, or rotation, within the housing. Misalignment The bearing assembly is designed for ±1 1/2 of static misalignment between the bearing O.D. and housing bore. 113

116 Air Handling Locking Solutions Setscrew Locking 12 spaced, balanced three point contact minimizes inner ring distortion vibration, reduces noise, and improves reliability. Precision manufactured diamond faceted setscrews contribute to improved clamping and resistance to back out. 9 Typical Roundness of rowning 12 Setscrew OA Concentric OA is a concentric locking collar clamp design that results in nearperfect concentricity of the shaft to the bearing bore and maintains near perfect ball path roundness, while reducing fretting corrosion. This design eliminates the shaft damage of setscrew locking, and minimizes bearing induced vibration for smoother quieter operation. The collar has a TOR head cap screw that outlasts stripping 12 times longer than he head cap screws. Concentric is often specified in air handling, HVAC, fan and blower applications where noise and vibration reduction is essential. 9 Roundness rowning OA earing with 36 Locking

117 Air Handling Locking Solutions Eccentric Locking Eccentric locking design incorporates a precision eccentric collar to mate with the inner ring etension for shaft hold. Note: The eccentric is designed for single direction of rotation and should not be used when two direction rotation is present. 9 Typical Roundness of Manufactured earing Typical Roundness of 9 Competitor Setscrew Roundness of 65 Competitor Setscrews Roundness of 45 Competitor Setscrews

118 Mounting Installation NOTICE These bearings are designed for maimum permissible static misalignment of ± 1 1/2 degrees. Installation, handling or operation of the bearing in ecess of the maimum of ± 1 1/2 degrees can cause reduction in bearing performance and may lead to equipment failure. Do not strike or hammer on any component of the bearing and/or shaft. Impact can result in damage to the bearing that may cause reduction in bearing performance and may lead to equipment failure. Step 1: Inspect Shaft and ore Shaft should be within tolerance range shown in the table, clean and free of nicks and burrs. Mount bearings on unused section of shafting or repair/replace shafting as required. Inspect both the shaft and bearing bore for debris or contaminants. Wipe clean as necessary. SM Gold Table 1 Recommended Shaft Tolerances Nominal ore Diameter Tolerance (Inches) 1/2 1 15/16 +. / /16 +. /.1 Step 2: Check Support Surfaces Make sure the base of the housing and the support surfaces are clean and free from burrs. If the housing elevation is adjusted with shims these must cover the entire contact area between the housing and the support 116

119 Mounting Installation Continued surface. Step 3: Install Unit To aid installation, keep weight off bearing during mounting. Slide unit onto shaft by pushing on the inner ring. If it is difficult to mount bearing on shaft, use a piece of emery cloth to reduce any high spots on the shaft. Step 4: Fasten Unit in Place Install housing mounting bolts and check bearing alignment. Align the bearing units as closely as possible. Tighten mounting bolts to recommended fastener torques. Check the shaft for freedom of rotation by rotating shaft with hand in both directions. Step 5: Tighten Locking Mechanism a. Setscrew Locking Inserts Setscrews in multiple bearing applications should be aligned as shown. Tighten bearing units to the shaft as follows: i. Torque the first setscrew A to one half of the recommended torque in Table 2. ii. Torque the second setscrew to the full recommended torque. Go back to the first setscrew A and tighten to the full recommended torque. 117

120 Mounting Installation Continued MD Table 2 Setscrew Recommended Torque Screw Size He Size InchPounds 1/428 1/ /1624 5/ /824 3/ /162 7/ /22 1/ /818 5/ b. Eccentric Locking Inserts i. Place collar on inner race and rotate by hand in direction of shaft rotation until eccentrics are engaged. ii. Insert drift pin into the hole in the collar O.D. () and lock in direction of shaft rotation with the aid of small hammer. iii. Torque single setscrew (A) to recommended torque in Table 3. A MD Table Eccentric Locking Recommended Torque Screw Size He Size InchPounds 1/428 1/ /1624 5/ /824 3/ /162 7/ /22 1/ /818 5/

121 Mounting Installation Continued c. OA Locking Inserts i. e sure that the OA collar is fitted square and snug against the shoulder on the inner ring as shown. Push Locking Collar Tightly Against Inner Ring Shoulder ii. Torque the OA collar cap screw to the full recommended torque in Table 4. MD Table 4 OA Concentric Locking Collar Cap Screw Torque Screw Size Tor Size InchPounds # 832 T25 7 # 124 T27 1 1/42 T3 24 5/1618 T Check shaft again for freedom of rotation and then tighten the secondbearing unit in the same fashion. When all bearings are tightened, perform a final check to the shaft for freedom of rotation. 119

122 earing asics and FAQs Speed Capability Radial Load Capability Thrust Load Capability Misalignment all earings High Moderate Moderate Static What is the difference between static and dynamic misalignment? Static misalignment = shaft misalignment at a constant angle with respect to the bearing Dynamic misalignment = shaft that is continuously misaligning with respect to the bearing 12

123 earing Lubrication FAQs What is grease? Miture of a soap/thickener, an oil and additives The thickener s function is to retain oil in the bearing cavity The oil provides lubricity to the rolling elements and raceways of the bearing Additives such as rust preventatives can enhance grease characteristics Why grease instead of oil in the bearing? Grease is preferred due to reduced maintenance and/or lower cost Grease is easier to store, handle and transport Most mounted bearings are designed for relubrication with grease Oil is the preferred lubricant in highspeed or hightemperature applications Can I mi greases? Compatibility may be an issue when miing thickener and oil types Incompatibility can be avoided by using the grease or grease type recommended by the manufacturer Can I over grease a bearing? Ecessive grease in the bearing may be an issue for high speed applications Initial startup after relubrication should be slow to allow grease to purge When greasing, add grease slowly Many mounted bearing seals are designed to allow grease to purge Some seals can be damaged or blown out by ecessive relubrication How often should I regrease, and how much grease should I add? The engineering charts in the engineering sections of the catalogs serve as general schedules since applications vary greatly. Your eperience may be important in determining a lubrication schedule. 121

124 Lubrication Engineering Tables All rowning all earings are delivered with a high quality lithium comple grease with an EP additive. The bearing is ready for use with no initial lubrication required. The grease consists of a lithium comple thickener, mineral oil, and NLGI grade 2 consistency. Compatibility of grease is critical; therefore consult with Application Engineering and your grease supplier to insure greases are compatible For best performance it is recommended to relubricate with lithium comple thickened grease with a comparable NLGI consistency and base oil properties. Relubricatable rowning bearings are supplied with grease fittings or zerks for ease of lubrication with hand or automatic grease guns. Always wipe the fitting and grease nozzle clean. CAUTION: If possible, it is recommended to lubricate the bearing while rotating, until grease purge is seen from the seals. If this is not an option due to safety reasons, follow the alternate lubrication procedure below. ReLubrication Procedure: Stop rotating equipment. Add one half of the recommended amount shown in Table 1. Start the bearing and run for a few minutes. Stop the bearing and add the second half of the recommended amount. A temperature rise after lubrication, sometimes 3 F (17 C), is normal earing should operate at temperatures less than 2 F (94 C) and should not eceed 25 (121 C) for intermittent operation. For lubrication guidelines, see Table 2. Note: Table 2 is general recommendations. Eperience and testing may be required for specific applications. Note: Grease charges in Table 1 are based on the use of lithium comple thickened grease with a NLGI grade 2 consistency. rowning Lube Table 1 / Grease Charge for Relubrication Shaft Size 1 & 2 Series 3 Series Grease Charge Series Intermediate & (Mass Ounces) Standard Duty Medium Duty L1 1/2 5/ / / /16 1 1/4S 15/ /4 1 7/16 1 3/ /2 1 9/16 1 7/ /8 1 3/4 1 1/ /16 2S 1 11/16 1 3/ / / /4 2 7/16 2 3/ /2 2 11/16 2 7/16 2 1/ / / / / /16 3 1/ /

125 Lubrication Engineering Tables Cont. rowning Lube Table 2 / Relubrication Recommendations Environment Temperature ( F) Speed (% Catalog Ma) Frequency Dirty 2 to 25 1% Daily to 1 Week 25% 4 to 1 Months 2 to % 1 to 4 Months 51 75% 1 Week to 1 Month 76 1% Daily to 1 Week Clean 25% 2 to 6 Weeks 26 5% 1 Week to 1 Month 125 to % Daily to 1 Week 76 1% 175 to 25 1% Daily to 1 Week Air Handling Interchange Table 8 Set Screw all earing Interchange Requested Part Description Manufacturer rowning Part Description P2SCAH Dodge* VPS2 AH P2SCMAH Dodge* VPS3 AH SYTF/AH SKF* VPS2 AH SYMTF/AH SKF* VPS3 AH RASC Fafnir* VPS2 AH P3UN Linkelt* VPS2 AH Table 9 all earing Interchange (OA) Requested Part Description Manufacturer rowning Part Description P2DLAH Dodge* VP2 AH P2DLMAH Dodge* VP3 AH Table 1 Rubber Mount Interchange Requested Part Description Manufacturer rowning Part Description RFM SKF* RUR1 RSCM Fafnir* RUR1 *Alway consult manufacturer s catalog for detailed dimensions. * The following trade names, trademarks and/or registered trademarks are used in this material by Regal eloit Corporation for comparison purposes only, are NOT owned or controlled by Regal eloit Corporation and are believed to be owned by the following parties. Dodge: aldor Electric Company; Fafnir: Timken US Corporation; Linkelt: Linkelt Construction Equipment; Renord: Renord Industries, LLC; SKF: SKF USA Inc. 123

126 Visit our online resources at... RegalPTS.com Visit our website for a full suite of installation instructions, product interchange software, downloadable catalogs and more. Twitter.com/HVACSaveGreen follow us on Twitter for industry news and join in the Green HVAC conversation! Like us on Facebook and be the first to view all the elt Drive Monthly s Search rowning elt Drives Save the Green Join in on our belt drive conversations for energy savings and benefits YouTube.com/ThePowerTransmission Subscribe and be the first to known when new videos are posted Check out our Save the Green Video while you are there Try Out Our Free Toolbo Technician App Energy Efficiency Calculator GPSactivated Where To uy Conversion tools And many other great features. 124

127 Notes 125

128 Notes 126

129 Notes 127

130 Regal Power Transmission Solutions 712 New uffington Rd Florence, KY 4142 Customer Service: Fa: Technical Service: APPLICATION CONSIDERATIONS The proper selection and application of power transmission products and components, including the related area of product safety, is the responsibility of the customer. Operating and performance requirements and potential associated issues will vary appreciably depending upon the use and application of such products and components. The scope of the technical and application information included in this publication is necessarily limited. Unusual operating environments and conditions, lubrication requirements, loading supports, and other factors can materially affect the application and operating results of the products and components and the customer should carefully review its requirements. Any technical advice or review furnished by Regal eloit America, Inc. and its affiliates with respect to the use of products and components is given in good faith and without charge, and Regal assumes no obligation or liability for the advice given, or results obtained, all such advice and review being given and accepted at customer s risk. For a copy of our Standard Terms and Conditions of Sale, Disclaimers of Warranty, Limitation of Liability and Remedy, please contact Customer Service at These terms and conditions of sale, disclaimers and limitations of liability apply to any person who may buy, acquire or use a Regal eloit America Inc. product referred to herein, including any person who buys from a licensed distributor of these branded products. 5V, rowning, EDGE, Gripbelt, Gripnotch, MVP, Save the Greenand Toolbo Technician are trademarks of Regal eloit Corporation or one of its affiliated companies. 216 Regal eloit Corporation, All Rights Reserved. MCC1516E Form# 8932E Printed in USA