Ball bearing units and insert bearings - SKF.com

1 A supplement to SKF bearings and mounted products (pub #100-700) ball bearing units and insert bearingsTABLE OF CONTENTSBall bearing units bearing units ..2 Shaft locking methods ..4 Seal and flinger options ..5 ball bearing unit radial load charts ..6 Air handling units ..8 ball bearing units ..10 insert bearings bearings nomenclature ..44 Speed ratings / Internal bearings ..46 This catalog is intended to be used as a product reference guide only and as such contains only very basic information. This catalog is not intended to be used as a design manual.

2 The data in this catalog is based on current information at the time of press. SKF reserves the right to make changes necessitated by technological developments. Consult SKF USA Inc. prior to design change or order information on mounting, dismounting, lubrication, and maintenance of SKF products can be found in the SKF bearing Installation and Maintenance Guide (publication #140-710).Any reference in this catalog to SKF Applications Engineering is making reference to the SKF USA Inc. Applications Engineering Department that can be reach through the SKF Technical Hotline at does not guarantee the continued performance of any mounted unit where the insert bearing is replaced or modified by the to reach SKF USA Inc.

3 Customer service: 1-888-753-3477 Technical hotline: 1-888-753-2000 Email: Website: Online store: bearing unitsP2BL 207 WF W64 SufixInsert bearing selections (WF W64) F Set screw lock, seals and lingers, wide inner ring, A series insert Set screw lock, seals, narrow inner ring, A series insertF ccentric lock, seals, narrow inner ring, series insertWF ccentric lock, seals and lingers, wide inner ring, series insertLF on entra lock, seals and lingers, wide inner ring, S series insert itional o tions (WF W64)

4 22 ig temperature bearings wit grap ite cage 20 ig temperature bearings wit grap ite pasteW64 Solid il Air andling unit anti rotation pin ousing st leF2B Flange, two-bolt, cast ironF4B Flange, our-bolt, cast ironF4B Flange, our-bolt, cast iron, medium dut P2B illow block, cast ironP2BL illow block, cast iron, low center eig tP2B illow block, cast iron, medium dut P2B illow block, pressed steelP2B apped-base pillow block, t readed base, cast ironWS ide slot take-up, cast iron nd co er order separatel IS referenceF F F S S S SS F S aft si eInc First digit number o inc esSecond and t ird digits number o si teent s o an inc xa le 07 indicates 7 1 ( unit ) etricFirst two digits number o millimeters xa le indicates mm (or millimeters)

5 S 11 bore, itted into a ousing t at usuall accommodates a 1 1 insert bearing F2B Two-bolt cast iron flange unitsTwo-bolt cast iron flange units flange units support shafts through walls, bulkheads and other flat surfaces but have a more compact two-bolt design. F2BM medium duty housings accommodate a larger bearing for a given shaft size, resulting in a greater load carrying capacity. Both series are supplied with a grease fitting for relubrication and provide for initial bearing alignment. For more detailed information see data tables.

6 All bearing units consist o a precision wide inner ring bearing assembled into a ousing made o cast iron or pressed steel nits are prelubricated and are designed to slip it on to t e s a t ocking met od is eit er set screw locking, eccentric sel -locking or concentric n cast iron and pressed steel units , t e outside diameter o t e bearing and t e inside diameter o t e ousing are sp ered, allowing t e bearing to swi el wit in t e ousing to accommodate initial alignment ere are numerous bearing and ousing combinations to accommodate a di ersit o mounting sur aces, load re uirements, s a t si es and dimensional re uirements ousing t pes include pillow blocks, lange units , take-up units , langette units , and tapped base units P2B Pillow blocksPillow block housings, the most popular housing design for mounted bearings , are available in several series.

7 All are designed to support loads primarily directed through the base. The P2B series housing has a standard base-to-center height. The P2BL series features a low center height with a base-to-center height typically 1/16 lower than the P2B series. The PTBM series medium duty housings accommodate a larger bearing for a given shaft size, resulting in a greater load carrying capacity. All three housing series are supplied with a grease fitting for relubrication, have slotted bolt holes for adjustments during installation and provide for initial bearing alignment.

8 For more detailed information see data Four-bolt flange unitsFour-bolt cast iron flange units are designed to support shafts through walls, bulkheads and other flat surfaces. The housing mounts flush to the surface and the load is carried by the four mounting bolts. F4BM medium duty housings accommodate a larger bearing for a given shaft size, resulting in a great-er load carrying capacity. Both series are supplied with a grease fitting for relubrication and provide for initial bearing alignment. For more detailed information see data bearing units WSTU Center pull cast iron take-up unitsThese take-up units are typically used in conjunction with a customer supplied frame for belt or shaft tensioning in conveyor, elevator and power transmission applications.

9 A wide slot for the frame guide is standard. bearings are supplied with a grease fitting for relubrication and provide for initial bearing alignment. For more detailed information see data Tapped base unitsTapped base housings are a variation of pillow block housings. Their design is optimized for radial loads acting in the direction of the base or the support surface. Tapped base units have a narrow width for tight areas and the non-tensioning end of conveyors. For more detailed information see data 0 set screw angle or minimum inner distortion and knurled cup point set screws or increased ibration resistanceSlotted bolt oles allow or a range o base bolt spacings and pro ide or ad ustment at installation rade #10 balls, ground and oned racewa s or precision, uiet running and ig er speed capacit Anti-rotation pin or air andling (A )

10 Relubricated wit a ig ualit , long li e lit ium calcium grease ide inner ring lengt s or better load distribution olded glass iber rein orced pol amide cage or durabilit and uiet runningBall bearing units featuresSp ered ousing bore mates wit sp ered o bearing , allows unit to accommodate or initial errors in alignment esignation permanentl laser marked or eas identi ication o unitSolid ousing pro ides a robust base wit ig break strengt Set screw locking (RM, TF, TF-AH)Set screw locking features two set screws 120 apart.