Contents BUSHING S ELECTION P RODUCT S PECIFIC I NFORMATION TECHNICAL DATA A SSORTMENT. World s Widest Bushing Stock Assortment 2

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1 Contents BUSHING S ELECTION World s Widest Bushing Stock Assortment 2 SKF Bushings Product Selection Guide 4 SKF Bushings Technical Data 6 Bushing Selection Overview of Technical Data Temperature range 7 Coefficient of friction 7 Load capacity 8 Sliding velocity 8 Shaft recommendations 9 P RODUCT S PECIFIC I NFORMATION TECHNICAL DATA SKF Solid Bronze The all-round runner 11 SKF Sintered Bronze The fast runner 13 SKF Wrapped Bronze The cross-country runner 15 SKF PTFE Composite The long runner 17 SKF POM Composite The up-hill runner 19 SKF Stainless Backed Composite The smooth & shiny runner 21 SKF PTFE Polyamide The jogging runner 23 SKF Filament Wound The heavy-duty runner 25 A SSORTMENT SKF Solid Bronze The all-round runner 28 SKF Sintered Bronze The fast runner 32 SKF Wrapped Bronze The cross-country runner 36 SKF PTFE Composite The long runner 38 SKF POM Composite The up-hill runner 44 SKF Stainless Backed Composite The smooth & shiny runner 48 SKF PTFE Polyamide The jogging runner 50 SKF Filament Wound The heavy-duty runner 52 1

2 World s Widest Bushi SKF number one in bearings Made by SKF stands for excellence. It symbolises our consistent endeavour to achieve total quality in everything we do. We provide our customers with outstanding bushing quality. SKF your only bushing partner Using our global sales network and logistics expertise we offer a delivery service level far beyond that of any competitor. With the world s widest bushing stock assortment distributors and end users now have the solution for most industries and application needs from one single source. SKF we help to select the right bushing for you Throughout the world we are recognised as the leading rolling bearing manufacturer. We are renowned for our excellent technical support and application know-how. However, we are also a major player in the plain bearing field: spherical plain bearings, rod ends and now a much expanded range of bushings. The product selection guide in this catalogue simplifies the selection of bushings from our expanded range for you. 2

3 ng Stock Assortment SKF Solid Bronze The all-round runner The traditional and robust bushing material SKF Sintered Bronze The fast runner Oil impregnation allows very high sliding velocity SKF Wrapped Bronze The cross-country runner Excellent in dirty environments due to lubrication pockets SKF PTFE Composite The long runner Long maintenance-free operating life due to low friction SKF POM Composite The up-hill runner Optimal combination of low maintenance under tough running conditions SKF Stainless Backed Composite The smooth & shiny runner The non-corrosive maintenance-free long runner SKF PTFE Polyamide The jogging runner The cost efficient maintenance-free bushing SKF Filament Wound The heavy-duty runner The maintenance-free bushing for extreme running conditions 3

4 SKF Bushings Pro Solid Bronze The all-round runner Sintered Bronze The fast runner Wrapped Bronze The cross-country runner Self-lubricating performance Maintenance-free operation Dirty environment Corrosion resistant High temperature Heavy load Shock loads/vibrations High sliding velocity Low friction Poor shaft surface finish Small operating clearance Insensitive to misalignment Low price level Assortment Product series designation PBM PBMF PSM PSMF PRM PRMF Page Excellent (++) Good (+)

5 duct Selection Guide PTFE Composite The long runner POM Composite The up-hill runner Stainless Backed Composite The smooth & shiny runner PTFE Polyamide The jogging runner Filament Wound The heavy-duty runner PCM.. E(B) PCMW.. B PCMF.. E(B) PCMS.. B PCM.. M PCMW.. M PCMS.. M PI PPM PPMF PWM Suitable (0) Not suitable ( ) 5

6 SKF Bushings Technical Data Solid Bronze The all-round runner Sintered Bronze The fast runner Wrapped Bronze The cross-country runner PTFE Composite The long runner POM Composite The up-hill runner Stainless Backed Composite The smooth & shiny runner PTFE Polyamide The jogging runner Filament Wound The heavy-duty runner Temperature range, C Friction coefficient, µ 0,08.. 0,15 0,05.. 0,10 0,08.. 0,15 0,03.. 0,25 0,02.. 0,20 0,03.. 0,08 0,06.. 0,15 0,03.. 0,08 Permissible load, N/mm 2 dynamic (v 0,02) 120 (v 0,02) 80 (v 0,5) static Permissible sliding velocity, m/s 0,5 0, ,0 2,0 (p 1,0) 2,5 (p 1,0) 1,5 1,0 0,5 Shaft tolerance e7 e8 f7 f8 e7 f8 f7 h8 h7 h8 g6 f7 h8 h9 h7 h8 Housing tolerance H7 H7 H7 H7 H7 H7 H7 H7 Shaft roughness Ra, µm 0.. 1,0 0,2.. 0,8 0,4.. 0, , , , , ,8 Shaft hardness, HB Assortment Product series designation PCM.. E(B) PCMW.. B PCM.. M PCMW.. M PBM PBMF PSM PSMF PRM PRMF PI PPM PPMF PWM PCMF.. E(B) PCMS.. B PCMS.. M The sliding velocity can be calculated using The specific bearing load can be calculated using v = n π d / ( ) p = F/(d b) where v = sliding velocity, m/s n = rotational speed, r/min d = bore diameter of bushing, mm where p = specific bearing load, N/mm 2 F = bearing load, N d = bore diameter of bushing, mm b = width of bushing, mm 6

7 Bushing Selection Overview of Technical Data Temperature range Ambient temperature range ( C) for the different SKF sliding materials under normal operating conditions. Temperature, C 250 The temperature range for SKF Solid and Wrapped Bronze bushings can be extended by using special lubricant Solid Sintered Wrapped POM PTFE Filament Bronze Bronze Bronze Com- Poly- Wound -200 posite -150 amide PTFE Stainless Composite Backed Composite Coefficient of friction Coefficient of friction (µ) under dry or initially lubricated operating conditions (typical values) for the different SKF sliding materials. Coefficient of friction µ 0,20 0,15 0,10 0,05 0,25 The friction of SKF sliding materials against a technical surface depends principially on the load, sliding velocity, surface roughness of the mating surface and the lubrication conditions. The lower coefficients of friction are obtained under heavy specific loads at low sliding velocities (not applicable to SKF Sintered Bronze). Both higher and lower friction can occur under extreme conditions. 0,00 Solid Sintered Wrapped PTFE POM Stainless PTFE Filament Bronze Bronze Bronze Com- Com- Backed Poly- Wound posite posite Composite amide 7

8 The load capacity for a specific application also depends on several other factors, such as type of load, sliding velocity and frequency of oscillation. Load capacity Permissible specific bearing load, p (dynamic), N/mm 2, at a sliding velocity less than 0,01 m/s and permissible static load (N/mm 2 ) at v = 0 m/s for the different SKF sliding materials. Surface pressure, N/mm 2 = dynamic = static Solid Sintered Wrapped PTFE POM Stainless PTFE Filament Bronze Bronze Bronze Com- Com- Backed Poly- Wound posite posite Composite amide All sliding materials supplied by SKF can operate under rotational, oscillating and linear movements. The permissible sliding velocity for a specific application also depends on such factors as load, shaft surface and heat removed. Sliding velocity Permissible continuous sliding velocity (m/s) at a load less than 1 N/mm 2 under dry or initially lubricated operating conditions for the different SKF sliding materials. Sliding velocity, m/s Solid Sintered Wrapped PTFE POM Stainless PTFE Filament Bronze Bronze Bronze Com- Com- Backed Poly- Wound posite posite Composite amide 8

9 Shaft recommendations Recommended ISO tolerance, surface roughness and suface hardness of the shaft for the different SKF sliding materials. Larger tolerance grades can be used when the application demands are moderate. 0 h8 h7 h8 g6 h8 h9 h7 h8 f7 f8 f8 f7 f7 e7 e8 e7 Solid Sintered Wrapped PTFE POM Stainless PTFE Filament Bronze Bronze Bronze Com- Com- Backed Poly- Wound posite posite Composite amide Shaft surface roughness R a, µm 2,0 1,5 1,0 The surface roughness often has a significant influence on the operating life. However, a surface roughness with a value higher than 0,04 µm may have a negative effect. 0,5 0,0 Solid Sintered Wrapped PTFE POM Stainless PTFE Filament Bronze Bronze Bronze Com- Com- Backed Poly- Wound posite posite Composite amide Shaft surface hardness, HB The heavier the load, the harder the shaft should be. High risk for embedding inprinting will also require a harder shaft Solid Sintered Wrapped PTFE POM Stainless PTFE Filament Bronze Bronze Bronze Com- Com- Backed Poly- Wound posite posite Composite amide 9

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11 SKF Solid Bronze The all-round runner The traditional and robust bushing material No other cylindrical bushing is used in as many and as varied applications as solid bronze bushings. The solid bronze material is very well suited for highly demanding applications in tough environments. SKF offers a standard assortment of both plain and flanged cylindrical bushings in accordance with ISO 4379:1993. SKF Solid Bronze bushings have many features and advantages such as: insensitive to dirty environment resistant to shock loads and vibrations at low speeds enable operation with a poor shaft surface finish good resistance to corrosive conditions lubrication groove Material SKF Solid Bronze bushings are made of a multi-component bronze, CuSn7Zn4Pb7-B, which has very good sliding properties. All surfaces of the solid bronze bushings are machined. Main applications 1) SKF Solid Bronze bushings are intended for oscillating movements in both rotational and axial directions. SKF Solid Bronze bushings are not intended for rotating movements at medium or high speeds. Examples of applications are: construction machinery transport equipment pulp and papermaking machinery off-shore equipment Lubrication SKF Solid Bronze bushings are intended to be lubricated with oil or grease. Lubrication not only improves the sliding properties, but also reduces wear and prevents corrosion. Grease is usually used when lubrication is periodical, while in exceptional cases, an oil bath is used. Seals are recommended when the bushing is to be used in an aggressive environment. All bushings with a bore diameter of 14 mm and above incorporate an axial lubrication grove. Positioning of lubrication groove at different running conditions rotating movement F F pendulum movement F β 2β oil grease Characteristics Permiss. load (dyn/stat), N/mm 2 25/45 Permiss. sliding velocity, m/s 0,5 Friction coefficient µ (greased) 0,08.. 0,15 Temperature range, C Application recommendations Shaft tolerance Housing tolerance e7 e8 H7 Shaft roughness R a, µm 0.. 1,0 1) The performance of SKF Solid Bronze bushings depends on the interaction of load, lubrication, surface roughness, sliding velocity, and temperature encountered in specific applications. Shaft hardness, HB

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13 SKF Sintered Bronze The fast runner Oil impregnation enables very high sliding velocity SKF Sintered Bronze cylindrical bushings are all self-lubricating and maintenancefree. The sintered bronze bushings consist of a porous bronze matrix impregnated with lubricant. The permissible sliding velocity for sintered bronze bushings is very high, which makes the bushings suitable for rotating applications. SKF offers a full range of both plain and flanged cylindrical bushings in accordance with ISO 2795:1991. Main applications 1) SKF Sintered Bronze bushings are most suitable for applications with rotating movements and where the self-lubricating performance requirements are high. Examples of applications are: electrical equipment household equipment printing machinery machine tools Lubrication D 1 js13 Lh13 Bh13 de7 Dr7 SKF Sintered Bronze bushings have many features and advantages such as: very high sliding velocity no external lubrication required maintenance-free operation good frictional properties While storing and mounting make sure that the bushing never comes into contact with any absorbent material, as this may drain the oil very quickly. It is therefore recommended to keep the bushing in the original packaging for as long as possible. Additional lubrication is usually not necessary. Dr7 Lh13 de7 Material SKF Sintered Bronze consists of a sintered metallic bronze and graphite matrix (1 % weight of graphite) with fully impregnated porosity. The material composition of SKF Sintered Bronze bushings is SINT A51 with a porosity volume of 28 % impregnated with mineral oil. Machining or grinding of the sliding surface of a porous sintered bushing is not recommended due to the risk of closing the bearing pores. 1) The performance of SKF Sintered Bronze bushings depends on the interaction of load, lubrication, surface roughness, sliding velocity, and temperature encountered in specific applications. Characteristics Permiss. load (dyn/stat), N/mm 2 10/20 Permiss. sliding velocity, m/s 0, Friction coefficient µ 0,05.. 0,10 Temperature range, C Application recommendations Shaft tolerance f7 f8 Housing tolerance H7 Shaft roughness R a, µm 0,2.. 0,8 Shaft hardness, HB

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15 SKF Wrapped Bronze The cross-country runner Excellent in dirty environments due to lubrication pockets SKF Wrapped Bronze cylindrical bushings are made completely of bronze. They are particularly suitable for applications which must be re-lubricated due to contaminated environments. The sliding surface is provided with lubrication pockets that contribute to the enhanced lubrication performance. SKF offers a full range of plain cylindrical bushings in accordance with ISO :1999, as well as flanged bushings. SKF Wrapped Bronze bushings have many features and advantages such as: insensitive to dirty environments resistant to shock loads and vibrations at slow speeds good resistance to corrosive conditions Main applications 1) SKF Wrapped Bronze bushings are suitable for both radial and axial movements. The bushings are well suited for machinery in contaminated environments where shock loads and/or vibrations occur. Examples of applications are: agricultural machinery hoisting equipment construction machinery forest machinery Lubrication Lubrication improves the sliding properties, reduces wear and prevents corrosion since the metal surfaces of bushing and shaft are separated from each other. SKF Wrapped Bronze bushings are intended to be lubricated with grease or oil. All commonly used greases can be used. Seals are recommended when the bearing is to be used in an aggressive environment. Diamond-shaped lubricant reservoirs Material SKF Wrapped Bronze bushings are made completely of bronze, CuSn8. The bushings are produced from strips which are then wrapped and calibrated. The working surface is machined and provided with diamond shaped indentations all over its sliding surface. These indentations serve as lubricant reservoirs, where lubricant is initially filled and progressively released during operation. Characteristics Permiss. load (dyn/stat), N/mm 2 40/120 Permiss. sliding velocity, m/s 1,0 Friction coefficient µ (greased) 0,08.. 0,15 Temperature range, C ) The performance of SKF Wrapped Bronze bushings depends on the interaction of load, lubrication, surface roughness, sliding velocity, and temperature encountered in specific applications. Application recommendations Shaft tolerance e7 f8 Housing tolerance H7 Shaft roughness R a, µm 0,4.. 0,8 Shaft hardness, HB

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17 SKF PTFE Composite The long runner Long maintenance-free operating life due to low friction In applications where other materials have shown insufficient operating life SKF PTFE Composite dry sliding bearings can be the solution. SKF PTFE Composite is specially designed to operate without lubricant and is particularly suited for heavy load/medium speed applications. SKF offers a full range of cylindrical bushings in accordance with ISO :1999 as well as flanged bushings, thrust washers and strip. SKF PTFE Composite bearings have many features and advantages such as: All SKF PTFE Composite dry sliding bearings can be machined, except for the sliding surface. However, a calibration is possible within certain limits. Main applications 1) SKF PTFE Composite dry sliding bearings are suitable for applications where the load and self-lubrication requirements are high. Examples of applications are: automotive applications materials handling equipment home appliances and consumer goods textile machinery Cross section of SKF PTFE Composite PTFE tin bronze copper layer sheet steel backing copper layer tin layer maintenance-free operation very good frictional properties high load capacity operating temperatures up to 250 C sliding velocity up to 2 m/s small operating clearance Material SKF PTFE Composite dry sliding bearings combine the mechanical strength of steel with the low friction of a PTFE-based self-lubricating sliding layer. The intermediate layer of porous tin bronze enables a strong bond between the backing and sliding surfaces and also improves the dissipation of heat generated during operation. The bearings are available in two versions. One with a sliding layer without any lead. This version has the suffix E. Another version where the sliding layer contains a minor amount of lead incorporates the suffix B. To protect the bearings from corrosion the steel backing is tin-plated. Lubrication The PTFE-based sliding surface permits smooth, low-friction operation without lubrication or maintenance. During the running-in phase part of the covering layer of SKF PTFE Composite dry sliding bearings is transferred to the mating surface and forms a physically bonded lubricant film. The presence or continuous supply of oil or other non corrosive fluids may be advantageous and improve the performance of these bearings. Characteristics Permiss. load (dyn/stat), N/mm 2 80/250 Permiss. sliding velocity, m/s 2,0 (p 1,0) Friction coefficient µ 0,03.. 0,25 Temperature range, C Application recommendations Shaft tolerance Housing tolerance f7 h8 H7 Shaft roughness R a, µm 0.. 0,4 1) The performance of SKF PTFE Composite bearings depends on the interaction of load, lubrication, surface roughness, sliding velocity, and temperature encountered in specific applications. Shaft hardness, HB Note: Because of the lead content, SKF PTFE Composite type B should not be used in contact with food, beverage or pharmaceutical products. Try to use SKF PTFE Composite type E, SKF POM or Stainless Backed Composite bushings instead. 17

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19 SKF POM Composite The up-hill runner Optimal combination of low maintenance under tough running conditions SKF POM Composite is referred to as pre-lubricated because it requires only a trace of lubricant to operate satisfactorily for long periods. The material is designed to operate with marginal lubrication and effectively fills the gap between fully lubricated bearings and dry sliding bearings. SKF offers a full range of plain cylindrical bushings in accordance with ISO :1999, as well as thrust washers and strip. SKF POM Composite bushings have many features and advantages such as: maintenance-free operation very good frictional properties high load capacity high sliding velocity small operating clearance Material SKF POM Composite sliding bearings are specially designed to operate with marginal lubrication. The sliding surface has a highly effective grease retention system with lubrication pockets, which serve as grease reservoirs. SKF POM Composite consists of three bonded layers: a copper plated steel backing strip and a sintered porous tin bronze matrix covered with an acetal (polyoxymethylene, POM) resin. To protect the bearing from corrosion the steel backing is tin plated. All SKF POM Composite sliding bearings can be machined. However, any machining of the sliding surface should only be undertaken in exceptional cases. Main applications 1) SKF POM Composite sliding bearings are suited for low-maintenance applications in tough running conditions. As a result of the lubricant retention pockets on the sliding surface, SKF POM Composite bearings are especially well suited for applications in contaminated environments where lubricant cannot be supplied continuously or frequently. Examples of applications are: agricultural equipment construction machinery material handling equipment home appliances and consumer goods Lubrication SKF POM Composite bearings are designed to operate with marginal lubrication and should initially be lubricated with grease. It is not necessary to re-lubricate, but the presence or continuous supply of lubricant extends bearing service life considerably. To protect the mating surface against corrosion, grease can be periodically applied. 1) The performance of SKF POM Composite bearings depends on the interaction of load, lubrication, surface roughness, sliding velocity, and temperature encountered in specific applications. Cross section of SKF POM Composite POM tin bronze copper layer sheet steel backing copper layer tin layer Characteristics Permiss. load (dyn/stat), N/mm 2 120/250 Permiss. sliding velocity, m/s 2,5 (p 1,0) Friction coefficient µ 0,02.. 0,20 Temperature range, C Application recommendations Shaft tolerance h7 h8 Housing tolerance H7 Shaft roughness R a, µm 0.. 0,8 Shaft hardness, HB

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21 SKF Stainless Backed Composite The smooth & shiny runner The non-corrosive maintenancefree long-runner SKF Stainless Backed Composite dry sliding cylindrical bushings * are specially developed for maintenance-free applications requiring high resistance to corrosive environments. SKF Stainless Backed Composite bushings are designed to operate without lubricant and are particularly suited for heavily loaded applications. SKF offers a standard assortment of plain cylindrical bushings according to ISO :1999. SKF Stainless Backed Composite bushings have many features and advantages such as: excellent resistance to corrosive environments very good frictional properties maintenance-free operation high load capacity high sliding velocity small operating clearance Main applications 1) SKF Stainless Backed Composite bushings are able to sustain heavy load under low sliding velocity conditions in a corrosive environment. Examples of applications are: food and packaging industry valves and pumps medical equipment printing and papermaking machines off-shore industry Lubrication SKF Stainless Backed Composite bushings are completely self-lubricating. The PTFE fibre and the thermosetting resin enable low friction operation with no lubrication or maintenance. During a brief running-in phase part of the PTFE covering layer is transferred to the mating surface. Cross section of SKF Stainless Backed Composite Resin Welded joint Stainless steel backing PTFE fibres Metal wires Material SKF Stainless Backed Composite bushings are made of a stainless steel backing strip (X6CrNiMoTi ) covered with PTFE fibres consisting of multi-filament yarns. The PTFE yarn is woven together with metal wire to produce a doublesided fabric, with only PTFE fibres on the sliding surface. The metal side of the fabric is continuously soldered to the stainless steel backing. The PTFE side of the fabric is coated with a thermosetting resin preventing creep of the fabric under heavy loads. All SKF Stainless Backed Composite dry sliding bushings can be machined. However, any machining of the sliding surface should be avoided. 1) The performance of SKF Stainless Backed Composite bushings depends on the interaction of load, lubrication, surface roughness, sliding velocity, and temperature encountered in specific applications. * Branded Pydane in France. Pydane is a registered trademark of the SKF Group. Characteristics Permiss. load (dyn/stat), N/mm 2 80/300 Permiss. sliding velocity, m/s 1,5 Friction coefficient µ 0,03.. 0,08 Temperature range, C Application recommendations Shaft tolerance g6 f7 Housing tolerance H7 Shaft roughness R a, µm 0.. 0,4 Shaft hardness, HB

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23 SKF PTFE Polyamide The jogging runner The cost effective maintenancefree bushing The thermoplastic material of SKF PTFE Polyamide cylindrical bushings provides maintenance-free, dry sliding operation. SKF PTFE Polyamide bushings are designed for applications where other polymer bushings have shown insufficient operating life. The small wall thickness of these bushings provides good heat conducting characteristics, enabling high sliding velocities. SKF offers a standard assortment of both plain and flanged cylindrical bushings according to ISO :1999. SKF PTFE Polyamide bushings have many features and advantages such as: maintenance-free operation cost efficiency excellent resistance to corrosive environments electrically insulating properties Main applications 1) SKF PTFE Polyamide bushings are suitable for applications where cost effective maintenance-free bushings are preferred. Examples of applications are: textile industry medical equipment fitness equipment household equipment Lubrication SKF PTFE Polyamide bushings are designed for dry operation. Lubrication can, however, improve the performance of these bushings. By continuously lubricating with grease, oil, water or other liquids, the operating speed can be increased still further. SKF PTFE Polyamide bushings are resistant to most lubricant oils and greases. Material SKF PTFE Polyamide bushings comprise a thermoplastic base material, with both PTFE additives and glass-fibre. The material mix of SKF PTFE Polyamide bushings results in self-lubricating low wear performance and, in many applications, adequate load capacity. 1) The performance of SKF PTFE Polyamide bushings depends on the interaction of load, lubrication, surface roughness, sliding velocity, and temperature encountered in specific applications. Characteristics Permiss. load (dyn/stat), N/mm 2 40/80 Permiss. sliding velocity, m/s 1,0 Friction coefficient µ 0,06.. 0,15 Temperature range C Application recommendations Shaft tolerance h8 h9 Housing tolerance H7 Shaft roughness R a, µm 0.. 0,8 Shaft hardness, HB

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25 SKF Filament Wound The heavy-duty runner The maintenance-free bushing for extreme running conditions SKF Filament Wound dry sliding cylindrical bushings are made out of resin and fibres wound in multi-layers. This material has been developed specially for applications with heavy loads, vibration and/or a corrosive environment. SKF Filament Wound bushings are most often interchangeable with solid bronze and steel bushings. SKF offers a standard assortment of plain cylindrical bushings in accordance with ISO 4379:1993. SKF Filament Wound bushings have many features and advantages such as: high load capacity excellent resistance to shock loads and vibrations low sensitivity to edge pressure and misalignment maintenance-free operation excellent resistance to corrosive environments very good frictional properties electrically insulating properties Main applications 1) SKF Filament Wound bushings are suitable in applications where heavy loads and vibrations occur and where maintenance-free operation is preferred. Examples of applications are: construction machinery agricultural and forestry machinery hoisting and conveyor equipment offshore equipment metal working machines Lubrication SKF Filament Wound bushings are dry running thanks to the unique sliding surface with PTFE and PES fibres in an epoxy resin. The sliding surface provides low friction operation with no lubrication or maintenance. However, the presence of lubricant offers protection against contamination and has no negative effect. Seals are recommended when the bushing is to be used in an aggressive environment. Cross section of SKF Filament Wound Material The modern technique of fibre winding, together with a specially developed resin matrix, combines the outstanding mechanical properties of glass-fibre with the excellent tribological behaviour of PTFE and high strength thermoplastic PES fibres. All SKF Filament Wound bushings can be mechanically machined, except for the sliding layer. In all cases care must be taken to avoid an excessive temperature rise as this could damage the bearing. 1) The performance of SKF Filament Wound bushings depends on the interaction of load, lubrication, surface roughness, sliding velocity, and temperature encountered in specific applications. Characteristics Permiss. load (dyn/stat), N/mm 2 140/200 Permiss. sliding velocity, m/s 0,5 Friction coefficient µ 0,03.. 0,08 Temperature range, C Application recommendations Shaft tolerance h7 h8 Housing tolerance H7 Shaft roughness R a, µm 0.. 0,8 Shaft hardness, HB

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27 Stock Assortment SKF Solid Bronze SKF Sintered Bronze SKF Wrapped Bronze SKF PTFE Composite SKF POM Composite SKF Stainless Backed Composite SKF PTFE Polyamide SKF Filament Wound

28 SKF Solid Bronze plain cylindrical bushings Designation system PBM B d D B Metric Solid bronze Plain bearing D d Designation d D B Designation d D B PBM M PBM M PBM M PBM M PBM M PBM M PBM M PBM M PBM M PBM M PBM M PBM M PBM M PBM M PBM M PBM M PBM M PBM M PBM M PBM M PBM M PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G Other dimensions available on request 28

29 d a h α a α h d d B 0,05 d+1, B 0,05 d+2,0 124 >190 B 0,05 d+2,5 124 Designation d D B Designation d D B PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G PBM M1G Other dimensions available on request 29

30 SKF Solid Bronze flanged cylindrical bushings Designation system PBMF d D B Flanged Metric Solid bronze Plain bearing D1 B1 B d D Designation d D B D 1 B 1 mm mm Designation d D B D 1 B 1 mm mm PBMF M PBMF M PBMF M PBMF M PBMF M PBMF M PBMF M PBMF M PBMF M PBMF M PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G Other dimensions available on request PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G

31 d a h α a α h d d B 0,05 d+1, B 0,05 d+2,0 124 >190 B 0,05 d+2,5 124 Designation d D B D 1 B 1 mm mm PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G PBMF M1G Other dimensions available on request 31

32 SKF Sintered Bronze plain cylindrical bushings Designation system PSM B d D B Metric Sintered bronze Plain bearing D d Designation d D B Designation d D B PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A Other dimensions available on request 32

33 Designation d D B Designation d D B PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A Other dimensions available on request 33

34 SKF Sintered Bronze plain cylindrical bushings Designation system PSM B d D B Metric Sintered bronze Plain bearing D d Designation d D B Designation d D B PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A PSM A Other dimensions available on request 34

35 SKF Sintered Bronze flanged cylindrical bushings Designation system PSMF d D B Flanged Metric Sintered bronze Plain bearing D1 B1 B d D Designation d D B D 1 B 1 mm mm Designation d D B D 1 B 1 mm mm PSMF A ,5 PSMF A ,5 PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A Other dimensions available on request PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A ,5 PSMF A ,5 PSMF A ,5 PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A PSMF A

36 SKF Wrapped Bronze plain cylindrical bushings Designation system PRM B Butt joint d D B Metric Wrapped bronze Plain bearing D d Designation d D B Designation d D B PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM PRM Other dimensions available on request 36

37 SKF Wrapped Bronze flanged cylindrical bushings B1 B Designation system PRMF d D B Flanged Metric Wrapped bronze Plain bearing D1 d D Butt joint Designation d D B D 1 B 1 mm mm Designation d D B D 1 B 1 mm mm PRMF ,5 PRMF ,5 PRMF ,5 PRMF ,5 PRMF PRMF PRMF PRMF PRMF PRMF PRMF ,5 PRMF ,5 PRMF ,5 PRMF ,5 PRMF ,5 PRMF ,5 PRMF ,5 PRMF ,5 PRMF ,5 PRMF ,5 PRMF ,5 PRMF ,5 PRMF ,5 PRMF ,5 PRMF ,5 Other dimensions available on request 37

38 SKF PTFE Composite plain cylindrical bushings Designation system PCM B (E) B Butt joint d D B B = PTFE + lead Metric E = PTFE + MoS 2 Composite Plain bearing D d Designation d D B Designation d D B PCM B/VB ,5 3 PCM E/VB ,5 3 PCM B/VB ,5 5 PCM E/VB ,5 5 PCM B/VB ,5 6 PCM E/VB ,5 6 PCM B/VB ,5 3 PCM E/VB ,5 3 PCM B/VB ,5 4 PCM E/VB ,5 4 PCM B/VB ,5 6 PCM E/VB ,5 6 PCM B/VB ,5 10 PCM E/VB ,5 10 PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM E PCM B PCM B PCM E PCM E Other dimensions available on request 38

39 Designation d D B Designation d D B PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM E PCM E Other dimensions available on request PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E

40 SKF PTFE Composite plain cylindrical bushings Designation system PCM B (E) B Butt joint d D B B = PTFE + lead Metric E = PTFE + MoS 2 Composite Plain bearing D d Designation d D B Designation d D B PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM E PCM B PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM E PCM B PCM B PCM B PCM B PCM B PCM B PCM B PCM B PCM B PCM B PCM B PCM B PCM B PCM B PCM B Other dimensions available on request 40

41 SKF PTFE Composite flanged cylindrical bushings B1 B Designation system PCMF B (E) d D B B = PTFE + lead Butt joint Flanged E = PTFE + MoS 2 Metric Composite Plain bearing D1 d D Designation d D B D 1 B 1 mm mm Designation d D B D 1 B 1 mm mm PCMF B PCMF E PCMF B PCMF E PCMF B , PCMF E , PCMF B , PCMF E , PCMF B , PCMF E , PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E PCMF B ,5 30 1,5 PCMF E ,5 30 1,5 PCMF B ,5 PCMF E ,5 PCMF B ,5 30 1,5 PCMF E ,5 30 1,5 PCMF B ,5 30 1,5 PCMF E ,5 30 1,5 PCMF B ,5 35 1,5 PCMF E ,5 35 1,5 PCMF B ,5 35 1,5 PCMF E ,5 35 1,5 PCMF B ,5 35 1,5 PCMF B ,5 35 1,5 PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E PCMF B PCMF E Other dimensions available on request 41

42 SKF PTFE Composite thrust washers Designation system PCMW B d D H PTFE + lead Thrust washer Metric Composite Plain bearing d H D Designation d D H Designation d D H PCMW B ,5 PCMW B ,5 PCMW B ,5 PCMW B ,5 PCMW B ,5 PCMW B ,5 PCMW B ,5 PCMW B ,5 PCMW B ,5 PCMW B ,5 PCMW B ,5 PCMW B Other dimensions available on request 42

43 SKF PTFE Composite strips Designation system PCMS B B L H PTFE + lead Strip Metric Composite Plain bearing H B L Designation B L H Designation B L H PCMS B ,75 PCMS B PCMS B ,5 PCMS B PCMS B ,5 PCMS B ,06 Other dimensions available on request 43

44 SKF POM Composite plain cylindrical bushings Designation system PCM M B M Butt joint d D B Sliding material, POM Metric Composite Plain bearing D d Designation d D B M mm Designation d D B M mm PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M PCM M Other dimensions available on request 44

45 Designation d D B M mm PCM M PCM M PCM M PCM M PCM M PCM M PCM M Other dimensions available on request 45

46 SKF POM Composite thrust washers H Designation system PCMW M d D B Sliding material, POM Thrust washer Metric Composite Plain bearing d D Designation d D H Designation d D H PCMW M ,5 PCMW M ,5 PCMW M ,5 PCMW M ,5 PCMW M ,5 PCMW M Other dimensions available on request 46

47 SKF POM Composite strips Designation system PCMS M B L H Sliding material, POM Strip Metric Composite Plain bearing H B L Designation B L H Designation B L H PCMS M PCMS M ,5 PCMS M ,5 PCMS M ,06 PCMS M Other dimensions available on request 47

48 SKF Stainless Backed Composite plain cylindrical bushings Designation system P I B Butt joint d D B Stainless backed composite Plain bearing D d Designation d D B Designation d D B PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI Other dimensions available on request 48

49 Designation d D B PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI PI Other dimensions available on request 49

50 SKF PTFE Polyamide plain cylindrical bushings Designation system PPM B d D B Metric PTFE polyamide Plain bearing D d Designation d D B Designation d D B PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM PPM Other dimensions available on request 50

51 SKF PTFE Polyamide flanged cylindrical bushings Designation system PPMF B1 B d D B Flanged Metric PTFE polyamide Plain bearing D1 d D Designation d D B D 1 B 1 mm mm Designation d D B D 1 B 1 mm mm PPMF PPMF PPMF PPMF PPMF PPMF PPMF PPMF PPMF PPMF ,5 30 1,5 PPMF ,5 30 1,5 PPMF ,5 35 1,5 PPMF ,5 35 1,5 Other dimensions available on request 51

52 SKF Filament Wound plain cylindrical bushings Designation system PWM B d D B Metric Filament wound Plain bearing D d Designation d D B Designation d D B PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PMW PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM PWM Other dimensions available on request 52

53 Designation d D B PWM PWM PWM PWM PWM PWM Other dimensions available on request 53

54 R SKF is registered trademark of the SKF Group. Copyright SKF 2004 The contents of this publication are the copyright of the publisher and may not be reproduced (even extracts) unless permission is granted. Every care has been taken to ensure the accuracy of the information contained in this publication but no liability can be accepted for any loss or damage whether direct, indirect or consequential arising out of the use of the information contained herein. Publication 4741/II E Printed in Estonia on environmentally friendly, chlorine-free paper (Multiart Silk) by UP Print.

55 SKF bushings