Angular contact ball bearings, super-precision 71903 CD/HCP4A
Bearing number : 71903 CD/HCP4A
Size (mm) : 17x30x7
Brand : SKF
Bore Diameter (mm) : 17
Outer Diameter (mm) : 30
Width (mm) : 7
Bearing dimensions and specification in SKF catalogue:
d - 17 mm
D - 30 mm
B - 7 mm
d1 - 20.9 mm
d2 - 20.9 mm
D1 - 25.7 mm
r1,2 - min. - 0.3 mm
r3,4 - min. - 0.2 mm
a - 6.7 mm
da - min. - 19 mm
db - min. - 19 mm
Da - max. - 28 mm
Db - max. - 28.6 mm
ra - max. - 0.3 mm
rb - max. - 0.2 mm
dn - 22.1 mm
Basic dynamic load rating - C - 4.2 kN
Basic static load rating - C0 - 2.1 kN
Fatigue load limit - Pu - 0.088 kN
Limiting speed for grease lubrication - 63000 r/min
Limiting speed for oil lubrication - 90000 mm/min
Ball - Dw - 3.969 mm
Ball - z - 14
Gref - 0.24 cm3
Calculation factor - f0 - 9.8
Preload class A - GA - 15 N
Preload class B - GB - 30 N
Preload class C - GC - 60 N
Preload class D - GD - 120 N
Calculation factor - f - 1.05
Calculation factor - f1 - 1
Calculation factor - f2A - 1
Calculation factor - f2B - 1.07
Calculation factor - f2C - 1.12
Calculation factor - f2D - 1.18
Calculation factor - fHC - 1.04
Preload class A - 18 N/micron
Preload class B - 24 N/micron
Preload class C - 34 N/micron
Preload class D - 47 N/micron
Mass bearing - 0.015 kg
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