Angular contact ball bearings, super-precision 728 ACD/HCP4A
Bearing number : 728 ACD/HCP4A
Size (mm) : 8x24x8
Brand : SKF
Bore Diameter (mm) : 8
Outer Diameter (mm) : 24
Width (mm) : 8
Bearing dimensions and specification in SKF catalogue:
d - 8 mm
D - 24 mm
B - 8 mm
d1 - 13.1 mm
d2 - 13.1 mm
D1 - 18.9 mm
r1,2 - min. - 0.3 mm
r3,4 - min. - 0.2 mm
a - 7.8 mm
da - min. - 10.4 mm
db - min. - 10.4 mm
Da - max. - 21.6 mm
Db - max. - 22.2 mm
ra - max. - 0.3 mm
rb - max. - 0.2 mm
dn - 14.3 mm
Basic dynamic load rating - C - 3.6 kN
Basic static load rating - C0 - 1.3 kN
Fatigue load limit - Pu - 0.057 kN
Limiting speed for grease lubrication - 75000 r/min
Limiting speed for oil lubrication - 120000 mm/min
Ball - Dw - 4.762 mm
Ball - z - 8
Gref - 0.228 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 - 22 N
Preload class B - GB - 44 N
Preload class C - GC - 88 N
Preload class D - GD - 176 N
Calculation factor - f - 1.02
Calculation factor - f1 - 0.99
Calculation factor - f2A - 1
Calculation factor - f2B - 1.01
Calculation factor - f2C - 1.03
Calculation factor - f2D - 1.06
Calculation factor - fHC - 1.01
Preload class A - 31 N/micron
Preload class B - 40 N/micron
Preload class C - 53 N/micron
Preload class D - 70 N/micron
Mass bearing - 0.015 kg
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