Angular contact ball bearings, super-precision S71904 CD/HCP4A
Bearing number : S71904 CD/HCP4A
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 - 8.4 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 - 6 kN
Basic static load rating - C0 - 3.2 kN
Fatigue load limit - Pu - 0.137 kN
Limiting speed for grease lubrication - 53000 r/min
Ball - Dw - 4.762 mm
Ball - z - 15
Calculation factor - f0 - 9.8
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 - 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 - 24 N/micron
Preload class B - 32 N/micron
Preload class C - 44 N/micron
Preload class D - 62 N/micron
Mass bearing - 0.033 kg
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Agents appointed in Finland, Switzerland, Belgium, Denmark, Austria and Australia. 1909 Subsidiary formed in New York - SKF Ball Bearing Co. A small workshop opened in Paris. Agents appointed in Italy, Argentina and Japan. 1910 Skefko Ball Bearing Co. Ltd in the UK registered. Work started on a plant in Luton.
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