d - 50 mm
D - 72 mm
B - 12 mm
d1 - 56.7 mm
d2 - 54.9 mm
D1 - 65.3 mm
r1,2 - min. - 0.6 mm
r3,4 - min. - 0.3 mm
a - 21.2 mm
da - min. - 53.2 mm
db - min. - 52 mm
Da - max. - 68.8 mm
Db - max. - 70 mm
ra - max. - 0.6 mm
rb - max. - 0.3 mm
dn - 58.4 mm
Basic dynamic load rating - C - 12.1 kN
Basic static load rating - C0 - 8.2 kN
Fatigue load limit - Pu - 0.345 kN
Limiting speed for grease lubrication - 28000 r/min
Limiting speed for oil lubrication - 43000 mm/min
Ball - Dw - 7.144 mm
Ball - z - 21
Gref - 1.7 cm3
Calculation factor - e - 0.68
Calculation factor - Y2 - 0.87
Calculation factor - Y0 - 0.38
Calculation factor - X2 - 0.41
Calculation factor - Y1 - 0.92
Calculation factor - Y2 - 1.41
Calculation factor - Y0 - 0.76
Calculation factor - X2 - 0.67
Preload class A - GA - 110 N
Preload class B - GB - 330 N
Preload class C - GC - 660 N
Calculation factor - f - 1.15
Calculation factor - f1 - 0.98
Calculation factor - f2A - 1
Calculation factor - f2B - 1.04
Calculation factor - f2C - 1.08
Calculation factor - fHC - 1.01
Preload class A - 107 N/micron
Preload class B - 161 N/micron
Preload class C - 211 N/micron
Mass bearing - 0.111 kg
Hot number:NTN 7215 B/DF SNR 7214 B/DF OKB 116944 OKB 18244 ISO 23130 KW33 NTN 29428 SKF 7020 ACB/HCP4A INA E40-KLL ISB FC 4054170 IKO NAS 5009UUNR RIV 16040 INA 4415 Barden HC7028TGP/4 SKF S71915 CB/P4A NOK IUH 30 22.4 5 標準
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