d - 20 mm
D - 42 mm
B - 12 mm
d1 - 26.6 mm
d2 - 24.8 mm
D2 - 36.5 mm
r1,2 - min. - 0.6 mm
r3,4 - min. - 0.3 mm
a - 10.2 mm
da - min. - 22 mm
da - max. - 26.2 mm
db - min. - 22 mm
db - max. - 24.4 mm
Da - max. - 40 mm
Db - max. - 39.6 mm
ra - max. - 0.6 mm
rb - max. - 0.3 mm
Basic dynamic load rating - C - 7.4 kN
Basic static load rating - C0 - 3.4 kN
Fatigue load limit - Pu - 0.143 kN
Limiting speed for grease lubrication - 65000 r/min
Ball - Dw - 6.35 mm
Ball - z - 12
Calculation factor - f0 - 7.2
Preload class A - GA - 40 N
Preload class B - GB - 120 N
Preload class C - GC - 235 N
Calculation factor - f - 1.04
Calculation factor - f1 - 1
Calculation factor - f2A - 1
Calculation factor - f2B - 1.03
Calculation factor - f2C - 1.05
Calculation factor - fHC - 1.01
Preload class A - 23 N/micron
Preload class B - 36 N/micron
Preload class C - 49 N/micron
Mass bearing - 0.059 kg
Hot number:SKF 7221 AC/DF TIMKEN HH840249/HH840210 OKB 346221 Gamet 123077X/123123XG Timken 260RT92 CX 25592/25520 NACHI 6915ZNR SIGMA 7226-B AST AST50 60IB36 NBS HK 0509 CX NUP18/1180 ISB SQL 20 C RS STEYR NU-1056 SKF 400400 GMN SA42X65X10
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