N Snap ring groove in the outerring outside diameter NR Snap ring groove in the outerring, with snap ring N1 One locating slot in one outerring side face N2 Two locating slots 180°apart in one outer ring side face P Injection moulded cage ofglass fibre reinforced poly- amide 6,6, roller centred PH Injection moulded PEEK cage,roller centred PHA Injection moulded PEEK cage,outer ring centred S1 Rings dimensionally stabilizedfor operating temperatures up to +200 °C S2 Rings dimensionally stabilizedfor operating temperatures up to +250 °C VA301 Bearing for railway vehicletraction motors VA305 VA301 + special inspectionroutines VA3091 VA301 + VL0241 VA350 Bearing for railway axleboxes VA820 Bearing for railway axleboxesaccording to EN 12080:1998,

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Product information

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Recommendations

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Product data Page ............. 3Page ............. 16 Supplementary designationsSupplementary designations H Reduced clearance rangecorresponding to the upper half of the actual range CN C2 Normal radial internal clear-ance; generally only appears in connection with one of the following letters for reduced or displaced clearance range Radial internal clearancesmaller than Normal L Reduced clearance rangecorresponding to the lower half of the actual rangeThe above letters are also used together with the clearance class suffixes C2, C3 and C4 The designation suffixes used to identify certain features of SKF single row cylindrical roller bearings are explained in the following. C3 Radial internal clearance greater than Normal C4 Radial internal clearance greater than C3 C5 Radial internal clearance greater than C4 EC HA3 Optimized internal designincorporating more and/or larger rollers and with modi- fied roller end/flange contact Inner ring of case-hardeningsteel HB1 Bainite hardened inner andouter ring

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HN1 Inner and outer ring with spe-cial surface “enriched” heat treatment J Pressed steel cage, rollercentred, unhardened K Tapered bore, taper 1:12 M Two-piece machined brasscage, roller centred MA Two-piece machined brasscage, outer ring centred MB Two-piece machined brasscage, inner ring centred ML One-piece form-turned win-dow-type brass cage, inner or outer ring centred MP MR One-piece window-type brasscage with milled, reamed or broached pockets, inner or outer ring centred One-piece form-turned win-dow-type brass cage, roller centred class 1 VC025 VL0241 VL2071 Bearing with specially wear-resistant raceways for applica- tions in heavily contaminated environments Aluminium-oxide coated out-side surface of the outer ring for electrical resistance up to 1 000 V DC Aluminium-oxide coated out-side surface of the inner ringfor electrical resistance up to 1 000 V DC VQ015 Inner ring with crowned race-way for increased permissible misalignment 31