Angular contact ball bearings, super-precision 71920 ACB/P4AL
Bearing number : 71920 ACB/P4AL
Size (mm) : 100x140x20
Brand : SKF
Bore Diameter (mm) : 100
Outer Diameter (mm) : 140
Width (mm) : 20
Bearing dimensions and specification in SKF catalogue:
d - 100 mm
D - 140 mm
B - 20 mm
d1 - 114.92 mm
d2 - 113.16 mm
D2 - 128.7 mm
b - 2.2 mm
C1 - 10.9 mm
C2 - 4.5 mm
C3 - 2.9 mm
r1,2 - min. - 1.1 mm
r3,4 - min. - 0.6 mm
a - 41.4 mm
da - min. - 106 mm
db - min. - 106 mm
Da - max. - 134 mm
Db - max. - 136.8 mm
ra - max. - 1 mm
rb - max. - 0.6 mm
dn - 116.1 mm
Basic dynamic load rating - C - 20.8 kN
Basic static load rating - C0 - 21.2 kN
Fatigue load limit - Pu - 0.815 kN
Limiting speed for grease lubrication - 11000 r/min
Limiting speed for oil lubrication - 17000 mm/min
Ball - Dw - 7.938 mm
Ball - z - 37
Gref - 9.96 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 - 125 N
Preload class B - GB - 250 N
Preload class C - GC - 750 N
Calculation factor - f - 1.11
Calculation factor - f1 - 0.99
Calculation factor - f2A - 1
Calculation factor - f2B - 1.02
Calculation factor - f2C - 1.07
Calculation factor - fHC - 1
Preload class A - 157 N/micron
Preload class B - 202 N/micron
Preload class C - 306 N/micron
Mass bearing - 0.848 kg
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