d - 50 mm
D - 65 mm
B - 7 mm
d1 - 55.1 mm
d2 - 55.1 mm
D1 - 60 mm
r1,2 - min. - 0.3 mm
r3,4 - min. - 0.15 mm
a - 11.2 mm
da - min. - 52 mm
db - min. - 52 mm
Da - max. - 63 mm
Db - max. - 64.2 mm
ra - max. - 0.3 mm
rb - max. - 0.15 mm
dn - 55.6 mm
Basic dynamic load rating - C - 7.4 kN
Basic static load rating - C0 - 7.8 kN
Fatigue load limit - Pu - 0.335 kN
Limiting speed for grease lubrication - 20000 r/min
Limiting speed for oil lubrication - 30000 mm/min
Ball - Dw - 3.969 mm
Ball - z - 30
Gref - 0.5 cm3
Calculation factor - f0 - 17.2
Preload class A - GA - 40 N
Preload class B - GB - 120 N
Preload class C - GC - 240 N
Calculation factor - f - 1.3
Calculation factor - f1 - 1
Calculation factor - f2A - 1
Calculation factor - f2B - 1.09
Calculation factor - f2C - 1.16
Calculation factor - fHC - 1
Preload class A - 47 N/micron
Preload class B - 81 N/micron
Preload class C - 119 N/micron
Mass bearing - 0.051 kg
Hot number:MRC 7209 B/DF OKB 180218K OKB 644913 ISO 231/800 KCW33+H31/800 CX 32912 A ISB EB1.22.0225.400-1SPPN KOYO MJ-16161 CYSD NUP2230 KOYO RE182220AL1 NSK R6VV Smith CRHSB-22 NTN RA-108-109 MRC 7122-KRD MRC 120-R SKF NU 2084 ECMA
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