Internal clearance SKF spherical roller bearings are man- ufactured as standard with Normal radial internal clearance. Nearly all the bearings are also available with a larger C3 internal clearance and some can be supplied with a even larger C4 clearance. Some sizes can be de- livered with C2 internal clearance which is smaller than Normal. Check the availability of bearings with radial Tolerances Running accuracy SKF spherical roller bearings with cylindrical and tapered bore are pro- duced as standard with normal toler- ances corresponding to ISO 492:1994. In high-speed bearing arrangements the demands on running accuracy are often higher than usual. For such bear- ing arrangements, the C08 execution is recommended which has running accuracy to ISO tolerance class 5 specifications. The values for the run- ning accuracy are in accordance with ISO 492:1994. Check availability of the C08 specification bearing before ordering. Annular groove and lubricationholes Efficient lubrication of the SKF spher- ical roller bearings is facilitated by either• three lubrication holes and an annulargroove (E design or suffix W33) or • three lubrication holes without annular groove (suffix W20). Explorer The designations of Explorer bearings are printed in blue in the product tables. Cylindrical or tapered bore SKF spherical roller bearings are avail- able with cylindrical bore and tapered bore. The tapered bore of bearings of series 240, 241, 248 and 249 has a taper of 1:30, whereas the bore of the other bearing series have a taper of 1:12.

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Product information Dimensions

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Recommendations

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Product data Page ............. 3Page ............. 18 The boundary dimensions of SKF spherical roller bearings with and with- out seals are in accordance with ISO 15:1998, except for the width of the sealed bearings of series BS2-22.These are basically series 222 E or 222 CC bearings, but are slightly wider to integrate the seals. Bearing data

Bearing data – general

≤ 65 mmGuide ring centred on the inner ring, two window-type steel cages. E designd > 65 mmGuide ring centred on the cages, two window-type steel cages.C, CC, EC and ECC designs Guide ring centred on the inner ring,two window-type steel cages.CA, CAC, CAF, ECA and ECAFdesignsGuide ring centred on the inner ring,retaining flanges on the inner ring, one-piece machined cage of brass or steel (suffix F). CAFA and CAMA designsGuide ring centred on the inner ring,retaining flanges on the inner ring, one-piece machined cage of steel (CAFA) or brass (CAMA). Depending on the size and the series, SKF spherical roller bearings incor- parate one of the internal designs shown below. Common features of all designs include symmetrical rollers and a floating guide ring between the roller rows. The arrangement of the guide ring as well as the cage execu-tion are different for the various designs.E designd
E designd E designd > 65 mmC, CC, EC and ECC designsCA, CAC, CAF, ECA and ECAF designs CAFA andCAMA designs W33 ≤ 65 mmW20 32 Designs