Angular contact ball bearings, super-precision 728 CD/P4A
Bearing number : 728 CD/P4A
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 - 6.2 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 - 3.7 kN
Basic static load rating - C0 - 1.4 kN
Fatigue load limit - Pu - 0.057 kN
Limiting speed for grease lubrication - 70000 r/min
Limiting speed for oil lubrication - 110000 mm/min
Ball - Dw - 4.762 mm
Ball - z - 8
Gref - 0.228 cm3
Calculation factor - f0 - 7.9
Preload class A - GA - 14 N
Preload class B - GB - 28 N
Preload class C - GC - 56 N
Preload class D - GD - 112 N
Calculation factor - f - 1.02
Calculation factor - f1 - 1
Calculation factor - f2A - 1
Calculation factor - f2B - 1.01
Calculation factor - f2C - 1.03
Calculation factor - f2D - 1.05
Calculation factor - fHC - 1
Preload class A - 12 N/micron
Preload class B - 15 N/micron
Preload class C - 21 N/micron
Preload class D - 30 N/micron
Mass bearing - 0.017 kg
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