Angular contact ball bearings, super-precision 71902 ACD/P4A
Bearing number : 71902 ACD/P4A
Size (mm) : 15x28x7
Brand : SKF
Bore Diameter (mm) : 15
Outer Diameter (mm) : 28
Width (mm) : 7
Bearing dimensions and specification in SKF catalogue:
d - 15 mm
D - 28 mm
B - 7 mm
d1 - 18.9 mm
d2 - 18.9 mm
D1 - 23.7 mm
r1,2 - min. - 0.3 mm
r3,4 - min. - 0.2 mm
a - 8.5 mm
da - min. - 17 mm
db - min. - 17 mm
Da - max. - 26 mm
Db - max. - 26.6 mm
ra - max. - 0.3 mm
rb - max. - 0.2 mm
dn - 20.1 mm
Basic dynamic load rating - C - 3.8 kN
Basic static load rating - C0 - 1.8 kN
Fatigue load limit - Pu - 0.078 kN
Limiting speed for grease lubrication - 50000 r/min
Limiting speed for oil lubrication - 75000 mm/min
Ball - Dw - 3.969 mm
Ball - z - 13
Gref - 0.21 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 - 25 N
Preload class B - GB - 50 N
Preload class C - GC - 100 N
Preload class D - GD - 200 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 - 40 N/micron
Preload class B - 51 N/micron
Preload class C - 67 N/micron
Preload class D - 88 N/micron
Mass bearing - 0.015 kg
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