DEEP GROOVE BALL BEARINGS. In-house Manufacturing. Individually Optimized Bearings. Significant Price Advantage.

Transcription

1 P ro u c t C ata lo gu e EEP GROOVE ALL EARINGS In-house Manufacturing. Iniviually Optimize earings. Significant Price Avantage. S I M P LY W ELL E N G I N EERE

2 P ROUCT C a t a l o g u e EEP GROOVE ALL EARINGS

3 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue INEX LF EARINGS LF earings - Simply well-engineere Service an Consulting Automize Prouction Lines evelopment Laboratory Quality Management base on German stanars Logistics with worlwie storage capacity Technical asics of Rolling earings 1.1 Rolling earings Loa Capacity an Service Life Equivalent ynamic Loa (Pr) Permissible Static Loa Raial Clearance Axial Clearance Operating earing Clearance Raial Clearance of eep Groove all earings Narrowe Raial Clearance Fits Fits for Raial Clearance of Accurancy Class Shaft an Housing Fits accoring to the Type of Loaing Housing Fits Shaft Fits Tolerances of Rolling earings Tolerances of Raial earings Accuracy Class P Accuracy Class P Accuracy Class P Constructive esign of Rolling earings Non-Locating earings Locating earings Ajuste earings Floating earings Press Lines S I M P LY W E L L- E N G I N E E R E O Arrangement X Arrangement Tanem Arrangement earing Selection Friction an Lubrication Friction Conition combine with a lubricant Type of Lubrication - Lubrication - Lubricants Materials Cages Mounting Storage of Rolling earings Mounting Preparation Tapere Seats Mounting Proceures earing Mounting earing ismounting eep Groove all earing Structure of a eep Groove all earing earing esignation earing Abbreviations 2.1 MR 2,,,,, ,,, 2,, 1, AISI C SS, SS, SS, SS, SS 2, SS Prouct Offering We ensure that all ata in this catalogue have been thoroughly compile an teste. However, we o not accept any liability for possible errors or ommisions. Copyright by LF Wälzlager GmbH. Any reproucting (full or partial) without prior written permission is prohibite.. Issue 21

4 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue Simply well-engineere Whether it s conveyor technology, rive technology, mechanical an plant engineering, pumps an compressors, automotive an agricultural technology, or the sports an leisure inustry inustries aroun the worl appreciate high quality LF rolling bearings manufacture accoring to German stanars. S I M P LY W E L L- E N G I N E E R E

5 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue Service an Consulting Automize Prouction Lines The LF Group has been a family business since its founing in 1. Our team of professionals provie seamless solutions for even the most sophisticate client nees. Our range of services is constantly growing because we have the ability to tailor our proucts aroun the niche concepts of any inustry. 1 million eep groove ball bearings per year, prouce on automize prouction lines, make up the core business of the LF Group. Our new prouction site for tapere an cylinrical roller bearings in Germany offers the best control possible for all quality requirements. It is a client s iniviual requirements terms of service life, noise level, loa capacity, maintenance, etc. that efine the esign of an LF bearing. In aition LF offers housing units, spherical roller bearings, an spherical plain bearings. LF also accommoates special operating conitions, such as very high or very low temperatures, spees, or forces. Our engineering staff gives competent an thorough avice on the following subjects: Selection of fits Mounting/Ajustment Materials Seals Lubricants earing Suitabilitiy Special earings earing esign evelopment L aboratory Our LF evelopment laboratory at our heaquarters in ortmun has the latest measuring technologies which enable us to easily ocument every new evelopment for our clients an promtly implement the optimizations. The stanar moel of LF rolling bearings is esigne to cover a wie range of applications. Our engineering team acts as avisors to a client uring the early esign phase, ajusting the constituents of the bearing to particular operating conitions resulting in another cost avantage for the client. S I M P LY W E L L- E N G I N E E R E

6 1 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue Quality Management base on German stanars Having our own automize prouction lines guarantee rolling bearings with high quality throughout. The aim of the LF Group is to provie the ieal bearings for all sectors. All proucts are manufacture in accorance to IN stanars an their specific requirements. The quality management system begins at the steel works. The grounwork for ensuring a high level of utilization an a long service life lies in the high-quality bearing steel an its remarkable egree of purity. All eliveries to our factories are strictly controlle. Quality management accoring to German stanars is a clear benefit for all prouction sectors of the LF Group. That is the reason why LF bearings are exceptionally resilient even uner harsh conitions. Logistics with worlwie storage capacit y The LF Group inclues the central warehouse in Germany, as well as further storage facilities in the Unite States, Chile, Italy, France an China. Our worlwie representation ensures the fastest response an elivery times possible for LF customers. ue to strong partners in logistics with branches across the worl, we provie our customers with further benefits. eing close to our customers has always been an will always be important for the LF Group. S I M P LY W E L L- E N G I N E E R E

7 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 1. Technical asics of Rolling earings Rolling earings Loa Capacity an Service Life Equivalent ynamic Loa (Pr) Permissible Static Loa Raial Clearance Axial Clearance Ajuste earings Floating earings Press Lines O Arrangement X Arrangement Tanem Arrangement Operating earing Clearance earing Selectio Raial Clearance of eep Groove all earings Friction an Lubrication Narrowe Raial Clearance Friction Conition combine with a lubricant Fits Type of Lubrication - Lubrication - Lubricants Fits for Raial Clearance of Accurancy Class Materials haft an Housing Fits accoring to the Type of Loaing Cages Housing Fits Mounting Shaft Fits Storage of Rolling earings Tolerances of Rolling earings Mounting Preparation Tolerances of Raial earings Tapere Seats Accuracy Class P Mounting Proceures Accuracy Class P earing Mounting Accuracy Class P earing ismounting Constructive esign of Rolling earings eep Groove all earing Non-Locating earings Structure of a eep Groove all earin Locating earings earing esignation S I M P LY W E L L- E N G I N E E R E

8 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 1.1 Rolling earings 1. Equivalent ynamic Loa ( Pr) In terms of rolling bearings, forces are transferre through the bearing rings, accoring to their loa, via the rolling element (ball, roller or neele) into other components. In contrast to slie bearings with sliing friction, rolling bearings show rolling friction. Pr = X Fr + Y Fa The factors X an Y are etermine by the ratio Fa/Cor. 1.2 Loa Capacit y an Sevice Life The fatigue life can be calculate with a formula which inclues the ynamic loa rating, the bearing loa an the operating spee. In the avance metho accoring to ISO 21, the failure probability as well as the influences of material an lubricant are also taken into account in form of factors a1, a2 an a. In general, a reliability of % is estimate. As a formula, this is represente for a rotating inner ring as follows: L1h [h] = ( ( Cr Pr 1 x n n spee in [min-1] Cr ynamic loa in [N] Pr equivalent bearing loa in [N] moifie in accorance to ISO 21 stanars L1hmo = a2 a L1h (for a1 = 1) a1 - Life ajustment factor for reliability acc. to IN ISO 21 a2 - Life ajustment factor for special bearing esigns acc. to IN ISO 21 a - Life ajustment factor for special operating conitions acc. to IN ISO 21 a) The reliabilities with matching a1 values are shown in the following table: A number of relations are liste in the following table: Fa/Cor e Fa/Fr <= e X.1. Fa/Fr > e Y X Y Table : Compile presentation of the equation for the factors X,Y an e. For small or miniature ball bearings below =1 mm, the loa ratio Fa/Cor shoul not excee the limit of.2. Reliability Ln a1 % L1 1. % L.2 % L. The static loa rating is use to esign bearings at low spees or swinging movements. S = C or / P or max % L. % L2. % L Permissible Static Loa The static loa safety factor S shoul be calculate in accorance with the following criteria: Table 1: Life ajustment factor a1 b) Heat stabilize bearings usually have a lower harness than stanar bearings mae of material GCr1 or 1 Cr, so that a correction must be mae by using the factor a2: Heat stabilization a2 temperature 2 C. temperature 2 C. Operation conition S high running precision require >2 stanar requirements low requirements 1 >. Table : Stanar values for the static loa safety Table 2: Life ajustment factor a2 c) Uner ieal conitions, the lubricant influence factor a is higher than 1, however, with lower spees an contamination etc., a significant reuction of the service life must be expecte (a << 1). In special cases please contact our consulting service. S I M P LY W E L L- E N G I N E E R E 1

9 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 1. Raial Clearance 1. Operating earing Clearance The raial clearance is measure by means of an integrate raial bearing with an outer ring, inner ring, an rolling element set. The raial clearance is efine as the amount by which a bearing ring can be shifte towar another one in the raial irection from one limit position to another, e.g. an inner ring towar an outer ring (see Fig. 1). Apart from the term raial clearance, which refers to an uninstalle rolling bearing, the term operating clearance is also frequently use. An operating clearance can be etermine when a bearing is mounte an has achieve the operating temperature. In this case, the raial clearance is generally smaller than in an unmounte bearing. It is classifie in groups accoring to IN 2-, ISO stanars (see Table an Fig. ). δ Interference fits between inner ring an shaft an/or between outer ring an housing lea to the reuction of the operating clearance. The interference causes the expansion of the inner ring an the contraction of the outer ring. Temperature influences such as a heat supply through a shaft or the cooling of an outer ring also result in inner ring expansion an/or outer ring contraction. In general, we recommen a raial clearance of CN an larger (see Fig. ). Smaller clearances than CN are suitable for special applications. In this case, please contact our LF engineers. 1.2 Fig. 1: Raial clearance C2 CN C C C 1. service life 1 1. A xial clearance.. The axial clearance is efine as the amount by which a bearing ring can be shifte towar another one in the axial irection from one limit position to another, e.g. an inner ring towar an outer ring (see Fig. 2). δ1..2 preloa Fig. : Raial clearance groups δ2 Suffix operating clearance Raial clearance groups Stanar IN 2-, ISO C2 clearance smaller than CN CN clearance normal C clearance larger than CN C clearance larger than C C clearance larger than C Table : Raial clearance groups Fig. 2: Axial clearance = δ 1 + δ 2 S I M P LY W E L L- E N G I N E E R E 1

10 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 1. Fits 1..1 Raial Clearance of eep Groove all earings Raial clearance in [μm] Nominal hole iameter more than 1, up to C2 min CN min C min C min We choose the most suitable bearing fit accoring to the role of roller bearings on shafts an in housings in axial, raial an tangential irections. In most cases, raial or tangential location is achieve by tight fits an an ultimate traction. A form-fitting fastening is usually use for axial location. To select a suitable fit, it shoul be taken into account that: I n orer to achieve the optimal use of the bearing loa capacity, the bearing rings have to be supporte aroun their entire circumference. W hen positioning the non-locating bearing, the bearing shoul be able to compensate for the axial isplacement. Mounting an ismounting of the rolling bearing with the appropriate tools must be simple. Temperature influences between inner an outer ring, accoring to the operating clearance, are essential. Table : Raial clearance acc. to IN Narrowe Raial Clearance Nominal hole iameter more than up to CM [μm] min. 1 1 Table : Narrowe raial clearance for special applications (e.g. electric motor bearing) S I M P LY W E L L- E N G I N E E R E 1

11 2 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 1..1 Fits for Raial Clearance of Accuracy Class Fits Shaft/earing Ø more than up to Fits Shaft/earing g g h h bearing shaft bearing shaft bearing shaft bearing shaft mp j js j Ø more than upper uner up to js k k m bearing shaft bearing shaft bearing shaft bearing shaft bearing shaft bearing shaft bearing shaft bearing shaft mp bearing shaft bearing shaft bearing shaft m n p r upper uner F~ L F~ L F~ L F~ L F~ 2L 1.F~ 2.L F~ 2L L F~ 1F 1F~ 1F 1F~ F 2F~ F F~ F 2F~ F 1 F~ L F~ L F~ L F~ L F~ 2L F~ L 1F~ 2L 1.F~.L 1F~ 1F F~ 1F 2F~ F F~ F 2F~ 1F F~ 1F F~ 1 2F~ L 2F~ 1L F~ L F~ L F~ L F~ L 1F~ L 1.F~.L 1F~ 1F 2F~ 1F F~ F 2F~ F 1F~ F F~ F 1 F~ 1L F~ 2L 1F~ L 1F~ L 1F~ L.F~.L 1F~ L 1 1.F~.L 21F~ 2F 2F~ 2F 2F~ F 1F~ F F~ 1F F~ F F~ 2L F~ 2L F~ L F~ 1L F~ L 1.F~.L F~ L 2F~ L 2F~ 2F F~ 2F F~ F F~ F F~ 1F F~ 2F 1 F~ L F~ 2L 1F~ L 1F~ 1L 21F~ L 21.F~.L 2F~ L 1.F~.L F~ 2F F~ 2F F~ F F~ F F~ 2F F~ F 2 F~ 2L F~ L 2F~ 1L 2F~ 2L 2F~ L 2.F~.L F~ L 2 1F~ L F~ F F~ F F~ F F~ F F~ F F~ F 2 F~ L F~ L 2F~ L 2F~ 2L F~ L F~ L F~ L 2.F~.L F~ F F~ F F~ 1F F~ 1F F~ 2F F~ F 1F~ 1 2 F~ L F~ L 2F~ L 2F~ 2L F~ L F~ L F~ L 1 2.F~.L F~ F F~ F F~ 1F F~ 1F F~ 2F F~ F F~ F 1 2 F~ L F~ L 2F~ L 2F~ 2L F~ L F~ L F~ L 1 2.F~.L F~ F F~ F F~ 1F F~ 1F F~ 2F F~ F 1F~ F 2 1F~ L 1F~ L F~ 2L F~ 2L F~ L F~ 1L F~ L 2.F~.L F~ F F~ F F~ 1F F~ 1F F~ 1F 1F~ F F~ F 2 1F~ L 1F~ L F~ 2L F~ 2L F~ L F~ 1L F~ L 2.F~.L F~ F F~ F F~ 1F F~ 1F F~ 1F 1F~ F F~ F F 2 1F~ L 1F~ L F~ 2L F~ 2L F~ L F~ 1L F~ L 2.F~.L F~ F F~ F F~ 1F F~ 1F F~ 1F 1F~ F F~ F 2 2 F~ L F~ L F~ L F~ L 2F~ 1L.F~.L 1F~ 1L 2 2 1F~ 1L 2F~ F 1F~ F F~ 2F F~ 2F F~ F F~ F F~ F 2 1 F~ L F~ L F~ L F~ L 2F~ 1L.F~.L 1F~ 1L 2 1 1F~ 1L 2F~ F 1F~ F F~ 2F F~ 2F F~ F F~ F 1F~ F 1 F~ L F~ L F~ 2L F~ L F~ L 2.F~.L F~ L 1 F~ L F~ F F~ F F~ 21F F~ 21F 1F~ F F~ 2F F~ F F~ L F~ L F~ 2L F~ L F~ L 2.F~.L F~ L F~ L F~ F F~ F F~ 21F F~ 21F 1F~ F F~ 2F 1F~ 1F 2F~ L 2F~ L F~ 2L F~ L 2F~ 2L.F~.L F~ 2L F~ 2L F~ F F~ F F~ F F~ F F~ F F~ F 21F~ F 2F~ L 2F~ L F~ 2L F~ L 2F~ 2L.F~.L F~ 2L F~ 2L F~ F F~ F F~ F F~ F F~ F F~ F 21F~ F Table : Fits Shaft/earing (tolerances in µm) Fits Housing/earing Ø more than up to 1 1 Fits Housing/earing G H H bearing shaft bearing shaft bearing shaft mp J J Js Ø more than upper uner L~ 2L ~ 1L ~ L F~ L F~ 1L.F~ 1.L L~ L ~ 1L ~ 2L F~ L F~ L F~ 1L up to 1 1 K K M bearing shaft bearing shaft bearing shaft mp bearing shaft bearing shaft bearing shaft N P bearing shaft bearing shaft upper uner F~ 1L 1F~ L 1F~ L 1F~ L F~ 1F F~ 1L F~ L F~ L F~ L 2F~ F L~ L ~ L ~ L F~ 1L F~ 21L 1.F~ 1.L F~ L 1F~ 1L 21F~ L 2F~ 2L F~ F L~ L ~ 2L ~ L F~ 21L F~ 2L.F~.L F~ L F~ L 2F~ L F~ L 2F~ F 1L~ L ~ L ~ L F~ 2L F~ 1L 1F~ 2L 1F~ 1L 21F~ L F~ L F~ L 1F~ F 1 L~ 2L ~ L ~ L F~ 1L F~ L 1.F~.L 1 F~ 1L 2F~ 2L F~ 1L F~ L F~ F 1 L~ 2L ~ L ~ L F~ L F~ L 2F~ L 21F~ L 2F~ L F~ L 2F~ L F~ 1F L~ L ~ L ~ L F~ L F~ 1L 2F~ L F~ 2L 2F~ L F~ 2L 2F~ L F~ F 2 1L~ 1L ~ L ~ L F~ 2L 1F~ L F~ L 2 F~ L F~ L F~ L F~ 1L F~ F 2 1 1L~ L ~ L ~ L F~ L 1F~ 1L 2F~ 1L 2 1 2F~ L F~ 1L 2F~ L F~ 21L F~ 1F 1 L~ L ~ L ~ L F~ L F~ L 2.F~.L 1 2F~ L F~ L F~ L F~ L F~ 1F 2L~ L ~ L ~ L F~ L 2F~ L 1.F~.L F~ L F~ L F~ L F~ 2L F~ Table : Fits Housing/earing (tolerances in µm) S I M P LY W E L L- E N G I N E E R E F = firm fit L = loose fit 21

12 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 1..2 Shaft an Housing Fits accoring to the Type of Loaing Type of loaing Inner ring: circumferential Outer ring: stationary Loa irection: constant Inner ring: stationary Outer ring: circumferential Loa irection: circumferential with outer ring Inner ring: stationary Outer ring: circumferential Loa irection: constant Inner ring: circumferential Outer ring: stationary Loa irection: circumferential with inner ring Figure 1.. Shaft Fits Loa on the bearing rings Fit Type of bearing constant loa irection Inner ring: tight fit point loa on the outer ring Outer ring: loose fit light up alternating loa circumferential loa on the inner ring normal up to heavy loa or constant loa irection point loa on the inner ring circumferential loa on the outer ring Inner ring: loose fit Outer ring: tight fit bearing with cylinrical bore inefinite loa irection severe loa or impact loa Table 1: Type of loaing point loa on the inner ring 1.. Housing Fits Hosuing split an unsplit housing Type of loaing point loa on the outer ring inefinite loa irection unsplit housing circumferential loa on the outer ring Table : Housing Fits S I M P LY W E L L- E N G I N E E R E Cylinrical or tapere roller bearing Spherical roller bearing Shaft fit Shaft iameter circumferential loa on the inner ring circumferential loa circumferential loa Type of loaing all bearing Housing fit bearing with tapere bore with clamping sleeves all types of loa H heat supply via shaft G light up to normal JS normal up to heavy loa K Table : Shaft Fits heavy impact loa M Note: light or alternating heavy loa M normal up to heavy loa N high loa, small wall thickness high impact loa P h 1 js 1 2 k m js 1 k 1 1 m m n 2 2 p 2 r 1 n 2 1 p 2 r axial isplacement of the inner ring necessary all shaft iameters g axial isplacement of the inner ring unnecessary all shaft iameters h all shaft iameters h / IT all types of loa 1) These recommenations refer to soli shafts mae of steel. 2) Js is recommene for axially loae raial bearings for all shaft iameters. ) Loas are classifie as follows: light loas: Pr. Cr normal loas:. Cr < Pr. Cr heavy loas: Pr. Cr This means: Pr: equivalent raial loa Cr: ynamic loa rating

13 LF EEP GROOVE ALL EARINGS Prouct Catalogue 1. Tolerances of Rolling earings It goes without saying that all rolling bearings in this catalogue comply with the vali ISO-stanars as well as the IN 2 an IN 2 stanars (with the exception of 2-). We ensure that all ata in this catalogue have been thoroughly compile an teste. However, we o not accept any liability for possible errors or omissions. The imensions an tolerances are efine in particular stanars (e.g. IN 2, IN 2 or ISO 1). They escribe the shape an the running precisions. The tolerance class P has the stanar tolerance values; P or P etc. are higher precision classes accoring to IN 2. A comparable rating is being mae accoring to American stanars (ANSI). IN 2 P P P P ANSI AEC-1 AEC- AEC- AEC- LF EEP GROOVE ALL EARINGS Prouct Catalogue ISO-Stanar Tolerances (IT qualities) acc. to IN ISO 2 Nominal imension in more than up to 1 IT IT 1 IT 2 IT IT IT IT IT IT IT IT1 IT IT 2 1 Values in [µm],, 1,2 2 1, 1 1, 2, 1, 1 1, 2, 1 1 1, 1, , 2, , 2, , , 2, 1 1 2, , Table : ISO-Stanar Tolerances (IT qualities) acc. to IN ISO 2 S I M P LY W E L L- E N G I N E E R E 2

14 2 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 1.1 Tolerances of Raial earings Accuracy Class P Explanations for the abbreviations use in the tables: Inner Ring 1. imensions Nominal imension of the bore iameter Nominal imension of the outer iameter Nominal imension of the outer ring with 2. imensional eviations mp eviation of the mean bore iameter from the nominal imension mp eviation of the mean outer iameter from the nominal imension s eviation of the inner ring with from the nominal imension Cs eviation of the outer ring with from the nominal imension. imension variations V p Variation of the bore iameter in a raial plane V mp Variation of the mean bore iameter V p Variation of the outer iameter in a raial plane V mp Variation of the mean outer iameter V s Variation of the inner ring with V Cs Variation of the outer ring with. Concentricity tolerances K ia Concentricity of the inner ring (raial runout) K ea Concentricity of the outer ring (raial runout) Ø imension mp more than up to upper below, 2, , V p Series,, Series, 1 Series 2,, V mp K ia s V s upper below Reihe 2,, with cover or seal isk V mp K ea Table : Tolerance accuracy class PO for the inner ring (tolerances in µm) Outer Ring Ø imension mp more than up to upper below 2, V p - open bearing Series,, Series, 1 Series 2,, Table 1: Tolerance accuracy class PO for the outer ring (tolerances in µm) S I M P LY W E L L- E N G I N E E R E Cs V Cs see s see V s 2

15 2 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue Accuracy Class P 1.1. Accuracy Class P Inner Ring Ø Inner Ring imension mp more than up to upper below, 2, , V p Series,, Series, 1 Series 2,, V mp K ia s upper below V s Ø imension mp V p Series,, Series, 1 Series 2,, V mp K ia s upper below more than up to upper below , 2, - - 2, Table : Tolerance accuracy class P for the inner ring (tolerances in µm) Outer Ring Outer Ring Ø imension mp more than up to upper below 2, Series,, Series, 1 Series 2,, Series 2,, with cover or seal isk V mp K ea Table 1: Tolerance accuracy class P for the outer ring (tolerances in µm) S I M P LY W E L L- E N G I N E E R E Cs V Cs see s see V s 1 Table 1: Tolerance accuracy class P for the inner ring (tolerances in µm) V p - open bearing V s Ø imension mp V p - open bearing Series,, Series, 1 Series 2,, Series 2,, with cover or seal isk V mp K ea Cs V Cs more than up to upper below 2, No efine values for these bearings Table 1: Tolerance accuracy class P for the outer ring (tolerances in µm) see s 1 2

16 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 1. Constructive esign of Rolling earings A shaft bearing generally requires two bearings which are arrange on a shaft with a efine istance to each other. epening on the application, we istinguish between non-locating, locating, ajuste an floating bearings Non-Locating earings In classic shaft bearings, which inclue two raial bearings, tolerance ifferences on the shaft an housing as well as temperature ifferences are extremely important. A non-locating bearing has to compensate tolerance an temperature ifferences. Hereby, axial tensions can be prevente (see Fig. an Fig. ) Locating earings Locating bearings have the purpose of transmitting axial forces an guiing the shaft axially (see Fig. an Fig. ). Fig. : Example of locating / non-locating bearing a = > non-locating bearing b = > locating bearing a b Fig. : Example of locating / non-locating bearing a = > non-locating bearing b = > locating bearing a S I M P LY W E L L- E N G I N E E R E b 1

17 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 1.. Ajuste earings 1.. Press Lines In ajuste bearings the bearing rings are ajuste in an axial irection. Most of the time, this type of bearing contains tapere roller bearings or angular contact ball bearings in O or X arrangement. Press lines are lines which can be rawn perpenicular to the contact points or contact lines between outer rings, balls an inner rings (see Fig., an 1). One bearing ring is ajuste to another with the esire clearance or preloa. This type of bearing is well suite for close shaft guiances, e.g. spinle bearings in machine tools. An ajuste bearing is ieal for alternating axial loas which are absorbe by the right or left bearing accoring to the loa irection. Ajuste bearings can also be set by the preloa of springs (see Fig. ). There are special spring washers for this. When ajusting the bearing, one must consier the thermal expansion of the shaft. 1.. O Arrangement y extensioning the press lines ( egrees), a cone is forme. If the tips of the cone are locate outsie the bearing, we refer to it as an O arrangement. This type of arrangement shows a higher rigiity against tilting than X arrangements (see Fig. ). 1.. X Arrangement If the cone tips still lie insie the bearing while extensioning the press lines by egrees, we refer to it as an X arrangement (see Fig. ). 1.. Floating earings Floating bearings are frequently use, if the shaft oes not require narrow axial guiance. This type of bearing is an economically efficient alternative to other bearing arrangements. Most of the time, the axial isplacement is realize by the outer ring. In orer to avoi an axial tension of the bearing, the mobility of the shaft (I) has to be set in an axial irection accoring to the temperature ifference between bearing an shaft (see Fig. ). 1.. Tanem Arrangement If the cone tips point in the same irection, we refer to it as a tanem arrangement (see Fig. 1). I Press Line Fig. : O Arrangement Fig. : Ajuste eep groove ball bearing with springs S I M P LY W E L L- E N G I N E E R E Fig. : X Arrangement Fig. 1: Tanem Arrangement Fig. : Floating earing

18 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 1. earing Selection The question of which rolling bearing to choose cannot be answere in a general way. In fact, more etaile information regaring application an application environment is require. The following information is mainly require to choose the right bearing: earing loaing Type of loaing (axial, raial forces, moments...) Application geometry ( shaft iameter, shaft length, housing bore...) Type of movement (rotating or oscillating) Ambient temperature Type of lubrication (grease-, oil lubrication...) The points liste above are the main criteria require for selecting a bearing. Furthermore, we nee ata regaring application environment an/or environmental influences, in orer to choose the right bearing. The fact whether the bearing will be use in water or in a vacuum is as important as information regaring loa or spee. S I M P LY W E L L- E N G I N E E R E

19 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 1. Friction an Lubrication 1..2 Type of Lubrication - Lubrication - Lubricants The main purpose of lubrication is to minimize friction an wear between two machine parts which move relatively to each other. This is achieve by builing a loa-carrying lubricant film between both machine parts. Type of lubrication: 1..1 Friction Conition combine with a lubricant: soli state friction grease lubrication oil lubrication Important for eciing on the application of grease or oil lubrication is whether the bearing of the mechanical machine elements shows rotary or linear movement. The most suite type of lubricant is chosen accoring to bearing type, ajacent construction, operating conitions an supply of lubricant. mixe friction Lubrication flui friction eep groove ball bearings seale on both sies are consiere to be lubricate for life an have the avantage of being maintenance-free, e.g. no re-lubrication, saving tools, cost reuction. Therefore, it must be kept in min that the urability of the grease might limit the service life of the bearing. Soli state friction or ry lubrication: The loa is mainly carrie by the roughness peaks of both soli objects (see Fig. ). Mixe friction or mixe lubricant: The loa is carrie by the roughness peaks an the lubricant (see Fig. ). Flui friction or full flui film lubrication: The stanar greases use are lithium soap greases with a mineral oil base an a service temperature range between -2 C an + C. It may be necessary, epening on the operating conitions, to use a special grease or even to reconvert to the maintenance operation. For high temperatures while using kiln truck bearings, paste-like lubricants such as molybenum isulphie must be use as total loss lubrication. The forming of a lubricating film emans a minimum relative spee an can be estimate using the empirical formula nm > 1.. The loa is fully carrie by the lubricant (see Fig. ). The mean bearing iameter m is etermine from. (+) Soli state Flui friction or full flui film lubrication is classifie in: hyrostatic lubrication Soli state hyromechanical lubrication Heavy bearing loas require lubricants with EP-aitives which possess optimum friction reucing properties. Lubricants Manufacturer Fig. : Soli state friction Function of a lubricant: Soli state Lubricant film Soli state minimizing friction minimizing wear ampening the running noise Soli state Kyoo Yushi protection against contamination an corrosion Klüber Lubricant film Soli state Fig. : Flui friction S I M P LY W E L L- E N G I N E E R E Sealant ase Oil Lithium Mineral Operating temperature C - ~ + Aeroshell No. Microgel iester - ~ + Multemp SRL Lithium iester - ~ +1 Isoflex Topas N2 arium Synthetic hyrocarbon - ~ + Isoflex LS Special A Lithium iester - ~ + Asonic GHY 2 Polyharnstoff Ester - ~ + Staburags NU arium Mineral -1 ~ + arrieta L-2 PTFE Polyphenyletheröl - ~ +2 Chevron SRI 2 Polyharnstoff Mineral - ~ +1 Shell heat issipation Fig. : Mixe friction Type Gaus S2 (Alvania No.R2) Caltex Table 2: Lubricants (other lubricants available on request)

20 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 1. Materials The right choice of the bearing material etermines the operating reliability an capability of the bearing. The harenability of the rings an rollling elements is a very important aspect for choosing the bearing material because it influences the loa capacity an fatigue strength of the bearing. The material use for the rings an rolling elements is a low-alloy, through harening chromium steel of high purity. The stanar material use for rings an balls is GCr1 Chromium steel. This material is esigne for an operating temperature range of -2 C up to + C an is therefore aapte to the respective RS-isc material NR. The following percents by weight are permissible for the most important steel components: GCr 1 C % Mn.% Si.1....% P <.2% S <.2% Cr % The cages are mae of sheet steel an are esigne accoringly to size as follows: C esignation F.. Mn.2. Si <. P <. S Cr <. <.1 Table 21: Cage materials Rust-inhibiting rolling bearings for the rings an rolling elements are manufacture accoring to AISI C. The cages of these bearings are mae of A ISI (other special materials available upon request). The following percents by weight are permissible for the most important steel components: AISI C C Mn Si < P < S < Cr S I M P LY W E L L- E N G I N E E R E % 1.% 1.%.%.% 1... %

21 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 1.1 Mounting Storage of Rolling earings Rolling bearings are precision machine elements an therefore nee to be mounte with the greatest care by expert staff. The bearings shoul be kept in the original package until mounting. Otherwise, there is the risk of contamination an corrosion. Larger bearings shoul be store lying flat, especially if the esign has narrow outer rings. LF bearings are treate with preservative oil before packaging. This oil oes not gum or haren. Furthermore, the bearing shoul be store in ry rooms an shoul be protecte from irect sunlight. Contact with acis, alkaline solutions an gases must be avoie Mounting Preparation The assembler shoul be familiar with each assembly step an shoul be able to compare the measurements on the rawings with the tolerances of the components (shaft/housing) an control them (e.g. for the imensional accuracy of the bore). The shaft an housing fits for the bearing rings shoul also be checke. Therefore, various measurement evices (e.g. outsie an insie micrometers) can be integrate. 1.1 Cages The mounting site must stay ry an ust-free. The rolling bearing must not be moifie afterwars, an the bearing seat on the shaft an in the housing must be kept clean. The main tasks of a cage are: The right bearing esignation for the construction must also be taken into account. s eparation of the rolling elements, in orer to keep friction an a hereby generate heat at the minimum k eeping the same istance between rolling elements, in orer to ensure an even loa istribution an a smooth run g uiing the rolling elements in the unloae zone of the bearing p reventing the rolling elements from falling out (in case of ismountable bearings) The selection of ifferent cage materials epens on several aspects: chemical reactions, which happen because of the lubricant; operating temperature of the bearing, an loaing of the cage Tapere Seats The taper ratio for the bearing rings is stanarize. Most of the taper ratios are 1:; in the case of some wier bearings it is 1:. In the case of tapere seats, the inner ring of bearings shoul absorb an transfer the loa on its entire with. The taper ratio of small taper rings can be compare to those of master taper rings. The inner ring cannot be use as the master taper ring. This is why we offer you sheet metal cages an brass cages, the latter in ifferent versions: metal, plastic an har tissue. The stanar eep groove ball bearings have sheet metal cages. For special application outsie the range of stanar cage materials contact our LF engineers. S I M P LY W E L L- E N G I N E E R E 1

22 2 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 1.1. Mounting Proceures There are three ifferent methos for mounting a rolling bearing: 1. Mechanical mounting metho 2. Hyraulic mounting metho. Thermic mounting metho 1.1. earing Mounting As state earlier, rolling bearings are precision machine elements an have to be installe carefully. ue to the large range of bearing esigns an ifferent sizes, a consistent mounting metho for bearings cannot be escribe at this point. Each mounting metho is choosen accoring to bearing esign an size (see paragraph Mounting Proceures). Rolling bearings shoul be integrate on the shaft or in the housing by means of a mechanical or hyraulic press. This ensures an even force transmission. When mounting the rolling bearing on a shaft or in a housing, one must know that the mounting force cannot be transferre from one bearing ring to another via the rolling element. irect hammer blows on the bearing rings shoul be avoie because they are harene an coul be amage otherwise. If the rolling bearing is to be re-use, this also applies to the ismounting (see Fig. an 1). Mounting of a rolling bearing on a shaft Mounting of a rolling bearing in a housing incorrect mounting, force transmission via rolling element Fig. S I M P LY W E L L- E N G I N E E R E correct mounting, force transmission via inner ring incorrect mounting, force transmission via rolling element correct mounting, force transmission via outer ring Fig. 1

23 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 1.1. earing ismounting The following methos are applie for mounting/ismounting of a bearing: 1. Mechanical mounting metho 2. Hyraulic mounting metho. Thermic mounting metho The ismounting of a bearing is as important as its mounting, if the bearing is to be re-use. There are special tools, such as an extraction tool, which make the bearing ismounting easier. When using the extractor, it has to be applie to the bearing ring which is to be remove. Otherwise, the bearing raceway can be amage. In terms of non-separable bearings, bearing rings are remove one by one. In separable bearings, however, surrouning components with loose or slie fits have to be remove first, in orer to separate the bearing from its press fit. When using a hammer for ismounting, one can apply, for example, a metal rift on the ring, to prevent a irect impact of the hammer blows on the bearing rings. Fig. 1: I mpressions of rolling elements cause by improper installation S I M P LY W E L L- E N G I N E E R E

24 LF EEP GROOVE ALL EARINGS Prouct Catalogue 1.1 eep Groove all earing LF EEP GROOVE ALL EARINGS Prouct Catalogue 1. Structure of a eep Groove all earing escription of eep Groove all earings The best-known an most sol bearing worlwie is the single-row eep groove ball bearing. The fiel of application is wie-ranging. Furthermore, it has a very goo price/performance ratio. The eep groove ball bearing is especially esigne to transform raial forces. ue to its raceway geometry, the balls are guie narrowly on their track. This is why axial forces can be transferre to both irections in this type of bearing. Features of eep Groove all earings: a bsorption of axial an raial forces s uite for high spees n ot emountable l imite angular ajustability Outer ring all Inner ring Cage Cages The stanar version of our single-row eep groove ball bearings has a sheet steel cage (other cage esigns available upon request). Clearance The stanar version of our single-row eep groove ball bearings is elivere with the usual clearance (other clearances available upon request). Tolerances The stanar version of our single-row eep groove ball bearings has the tolerance class P (esigns with tighter tolerances available upon request). Angle setting The compensation of misalignments of eep groove ball bearings is very limite. Therefore, bearing seats must align very well in the housing an on the shaft. Misalignments interfere with an optimal run of the ball in its raceway, which can cause an early bearing failure. Optionally: cover or sealing isc Temperature range The stanar version of our single-row eep groove ball bearing is suite for temperatures between -2 an + egrees Celsius. The use of this bearing type outsie the specifie range can only be realize after consulting the LF engineers. EMQ esign LF has evelope the EMQ esign for special requirements an applications (e.g. electric motors). Thanks to an ieal esign, special attention is given to noise features. S I M P LY W E L L- E N G I N E E R E

25 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 1.1 earing esignation The complete bearing esignation is compose of prefix, base esignation an suffix. In general, prefix symbols inicate special esigns. Rust-proof materials are inicate with the abbreviation for stainless steel for instance. The base esignation gives information about the bearing series (first two igits) an the bore imensions (last two igits). From coe igit an greater, the imension of the bore iameter is five times the value of the bore iameter coe igit (e.g. 2 means that the bore iameter is = mm). Exceptions are inicate by a forwar slash in front of the coe igit. Cage esigns, covers, an seals, etc. are encoe in form of suffixs. The most important abbreviations are liste in the following table: Abbreviation Meaning Z Metal shiel RS Contact seal RZ Non-contact seal N Ring groove in outer ring, without snap ring NR Ring groove in outer ring, with snap ring V Extene inner ring, special esign TNGH Glass-fiber reinforce plastic cage M rass cage C2 Raial tolerance smaller than normal C Raial tolerance larger than normal C Raial tolerance larger than C P Accuracy class PX (n) Special tolerances L (n) Lubricating grease, e.g. L1 Shell Gaus S2 VZ Galvanize surfaces EMQ Optimize esign (for special applications such as electric motors) Example: -Z -ZZ -2RS ZZ C L2 PX1 base esignation open -RZ -RS a a -2RZ imensions special tolerance RZ seal available on request type of grease cover isc on both sies clearance C (increase compare to the stanar) Example: EMQ S I M P LY W E L L- E N G I N E E R E

26 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue S I M P LY W E L L- E N G I N E E R E earing Abbreviations 2.1 MR 2,,,,, ,,, 2,, 1, AISI C SS, SS, SS, SS, SS 2, SS... 1

27 2 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 2.1 MR RS MINIATURE ALL EARINGS abbreviation main imension loa rating [N] 2, 2 2 MR 2-2RS ZZ 2 1-2RS 2 MR 2, MR -ZZ MR -2RS 2, MR 2 MR 2-ZZ open -Z -ZZ -2RS -RZ a a -2RZ imensions RZ seal available on request MR -RS limiting spee [ min -1] 2 grease oil 2 2 yn. Cr stat. Cor imensions weight [kg] a min a max,2,2,2,2,,,2,,,2,,,,,, 1 2 MR -ZZ, MR -2RS, 1,,, -ZZ 1,,, -2RS 1,,, MR 2 1, MR -ZZ 2, 1, MR -2RS 2, 1, MR 2 2, MR -ZZ 2, MR -2RS 2 2, ZZ -2RS 1 1 MR 1 1,,2,,,2,,,2,,, MR -ZZ 1, MR -2RS 1, 2 2,2,,1 -ZZ 2 2,2,,1-2RS 2 2,2,,1 Optimize loa rating available on request on request also available as EMQ bearing, see chapter 1. S I M P LY W E L L- E N G I N E E R E

28 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 2.1 MR... -2RS MINIATURE ALL EARINGS abbreviation 2 -ZZ 2 open -Z -ZZ -RS a a imensions RZ seal available on request oil 1 2 -ZZ 1-2RS 1 2 MR MR -ZZ 2, 2 MR -2RS 2, 2 MR 2, 2 MR -ZZ 2 MR -2RS 2 imensions weight [kg] a min a max,,2,1,,2,1,,2,1,,,,,,,,,,2 1,2,2,,, 2 MR 1 1 2, MR 1 -ZZ 1 2, MR 1-2RS 1 2, 2 2,2,, -ZZ 2 2,2,, -ZZ -2RZ grease yn. Cr stat. Cor -RZ limiting spee [ min -1] 1-2RS -2RS [N] -2RS loa rating main imension RS ZZ 2 1-2RS ,2,,,,,,,,,,,,,,,,,,,,,,, 2 -ZZ 1 1,,, 2-2RS 1 1 2,,, 1, 1,, 2 -ZZ 1, 1,, -2RS 1 21, 1,, Optimize loa rating available on request on request also available as EMQ bearing, see chapter 1. S I M P LY W E L L- E N G I N E E R E

29 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 2.1 MR RS MINIATURE ALL EARINGS abbreviation -Z -ZZ -2RS -RZ -RS a a -2RZ imensions RZ seal available on request [N] MR1 1 2, MR1 -ZZ 1 limiting spee [ min -1] grease oil yn. Cr stat. Cor MR1-2RS 1 MR MR -ZZ MR -2RS 1 1, 1 1 -ZZ open loa rating main imension imensions weight [kg] a min a max,,,,,,,2,, 1 1,2,, -2RS 1,2,, 1,,, -ZZ 1,,, -2RS 1,,, 2 1, 1,, 2 -ZZ 1, 1,, 2-2RS 1 21, 1,, MR 2, 1 2, MR-ZZ 1 2, MR-2RS 1 MR MR-ZZ MR-2RS, -ZZ 2,,1,1,1,2,,2,2,,2,2,,2 1, -2RS 1 -ZZ 1 1, -2RS 1 1, 2 2, 1,, 2 2-ZZ 2, 1,, 2-2RS 2 2, 1,, Optimize loa rating available on request on request also available as EMQ bearing, see chapter 1. S I M P LY W E L L- E N G I N E E R E

30 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue 2.1 MR RS MINIATURE ALL EARINGS abbreviation -Z -ZZ -2RS -RZ -RS a a -2RZ imensions RZ seal available on request [N] limiting spee [ min -1] oil weight [kg] MR 2, MR -ZZ, MR -2RS, MR,,1 MR -ZZ,1 MR -2RS,1 1,,, -ZZ 1,,, 1,,, grease imensions -2RS open loa rating main imension yn. Cr stat. Cor a min a max,,, 1 1 1, -ZZ 1 1 1, -2RS 1 1 1, 2 1 2, -ZZ 2 1 2, -2RS , 2 1 1, 21,,1 2 -ZZ 1 1, 21,,1 2-2RS 1 2 1, 21,,1 1 1, 1,, -ZZ 1 1, 1,, -2RS 1 1, 1,, 1, -ZZ 1, -2RS 1 2, ,,,2 2 -ZZ 2 1 1,,,2 2-2RS ,,,2 Optimize loa rating available on request on request also available as EMQ bearing, see chapter 1. S I M P LY W E L L- E N G I N E E R E

31 LF EEP GROOVE ALL EARINGS Prouct Catalogue S I M P LY W E L L- E N G I N E E R E LF EEP GROOVE ALL EARINGS Prouct Catalogue 1

32 2 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue RS eep Groove all earings abbreviation -Z -ZZ -2RS -RZ -RS a a -2RZ imensions RZ seal available on request loa rating [N] yn. Cr stat. Cor limiting spee [ min -1] grease oil imensions weight [kg] a min a max ZZ 1 2 1, -2RS 1 2 1, 2 2, -ZZ 2 2, -2RS , 2 1 2,2 -ZZ 2 1 2,2-2RS 2 1 1, , 2 1 2,2 2,, 2-ZZ 1 2,2 2,, 2-2RS 1 1,2 2,, -2RS ZZ 1-2RS 1-2RS ZZ RS -2RS open main imension 1, 2,,,2,, 2,2,,,2,, 1,,, 2 1, 2 1, , 1 2 2, 1-ZZ 2 2, 1-2RS 2 1, , 1-ZZ , 1-2RS , ,1 2,, ,2 2,, 21-ZZ 1 1,2 2,, 21-2RS 1 1 1,2 2,, 1-2RS 2 2 1,2 2,, , 1,, 1-ZZ 1 1 1, 1,, 1-2RS 1 1, 1,, 1-2RS 1 2 1, 1,, 1-2RS 2 2 Optimize loa rating available on request on request also available as EMQ bearing, see chapter 1. S I M P LY W E L L- E N G I N E E R E,

33 LF EEP GROOVE ALL EARINGS Prouct Catalogue LF EEP GROOVE ALL EARINGS Prouct Catalogue RS eep Groove all earings open -Z -2RS -RS loa rating [N] a -2RZ ZZ 2-2RS ZZ limiting spee [ min -1] grease oil RS ZZ 12-2RS 2 yn. Cr stat. Cor imensions weight [kg] a min a max 1, 2 1, 1 1, 1 2,1 1 2, ,1 1,2 1, RS -2RS -ZZ -2RS 2 2 1,2 1,1 1,1 2 1,1 2 1,1, 1 1,2,, 1 1,2,, 1,2,, 2-2RS 1 1 1,2,, ,,,2 -ZZ ,,,2-2RS 2 1 2,,,2 2-2RS ,,, 2 -ZZ 2-2RS ZZ 2-2RS 2-ZZ a imensions RZ seal available on request main imension -RZ -ZZ abbreviation , 1, 1, 1 2, 1 2, 2 1 2, 1, 1, 1, ZZ RS 1 2 1,2 -ZZ 1 2 1,2-2RS 1 1,2-2RS 2 1 1, 2 Optimize loa rating available on request on request also available as EMQ bearing, see chapter 1. S I M P LY W E L L- E N G I N E E R E