Angular contact ball bearings, super-precision S71904 ACD/P4A
Bearing number : S71904 ACD/P4A
Size (mm) : 20x37x9
Brand : SKF
Bore Diameter (mm) : 20
Outer Diameter (mm) : 37
Width (mm) : 9
Bearing dimensions and specification in SKF catalogue:
d - 20 mm
D - 37 mm
B - 9 mm
d1 - 25.6 mm
d2 - 25.6 mm
D2 - 34.15 mm
r1,2 - min. - 0.3 mm
r3,4 - min. - 0.2 mm
a - 11.2 mm
da - min. - 22 mm
da - max. - 25.1 mm
db - min. - 22 mm
db - max. - 25.1 mm
Da - max. - 35 mm
Db - max. - 35.6 mm
ra - max. - 0.3 mm
rb - max. - 0.2 mm
Basic dynamic load rating - C - 5.7 kN
Basic static load rating - C0 - 3 kN
Fatigue load limit - Pu - 0.129 kN
Limiting speed for grease lubrication - 38000 r/min
Ball - Dw - 4.762 mm
Ball - z - 15
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 - 35 N
Preload class B - GB - 70 N
Preload class C - GC - 140 N
Preload class D - GD - 280 N
Calculation factor - f - 1.05
Calculation factor - f1 - 0.98
Calculation factor - f2A - 1
Calculation factor - f2B - 1.04
Calculation factor - f2C - 1.08
Calculation factor - f2D - 1.14
Calculation factor - fHC - 1
Preload class A - 51 N/micron
Preload class B - 65 N/micron
Preload class C - 85 N/micron
Preload class D - 113 N/micron
Mass bearing - 0.037 kg
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