Angular contact ball bearings, super-precision 71921 CD/P4A
Bearing number : 71921 CD/P4A
Size (mm) : 105x145x20
Brand : SKF
Bore Diameter (mm) : 105
Outer Diameter (mm) : 145
Width (mm) : 20
Bearing dimensions and specification in SKF catalogue:
d - 105 mm
D - 145 mm
B - 20 mm
d1 - 117.3 mm
d2 - 117.3 mm
D1 - 132.7 mm
r1,2 - min. - 1.1 mm
r3,4 - min. - 0.6 mm
a - 26.8 mm
da - min. - 111 mm
db - min. - 111 mm
Da - max. - 139 mm
Db - max. - 141 mm
ra - max. - 1 mm
rb - max. - 0.6 mm
dn - 120.6 mm
Basic dynamic load rating - C - 61.8 kN
Basic static load rating - C0 - 69.5 kN
Fatigue load limit - Pu - 2.6 kN
Limiting speed for grease lubrication - 8500 r/min
Limiting speed for oil lubrication - 14000 mm/min
Ball - Dw - 12.7 mm
Ball - z - 27
Gref - 11.1 cm3
Calculation factor - f0 - 16.4
Preload class A - GA - 230 N
Preload class B - GB - 460 N
Preload class C - GC - 920 N
Preload class D - GD - 1840 N
Calculation factor - f - 1.25
Calculation factor - f1 - 1
Calculation factor - f2A - 1
Calculation factor - f2B - 1.04
Calculation factor - f2C - 1.09
Calculation factor - f2D - 1.15
Calculation factor - fHC - 1
Preload class A - 110 N/micron
Preload class B - 151 N/micron
Preload class C - 215 N/micron
Preload class D - 316 N/micron
Mass bearing - 0.82 kg
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