Angular contact ball bearings, super-precision 71909 CD/HCP4A
Bearing number : 71909 CD/HCP4A
Size (mm) : 45x68x12
Brand : SKF
Bore Diameter (mm) : 45
Outer Diameter (mm) : 68
Width (mm) : 12
Bearing dimensions and specification in SKF catalogue:
d - 45 mm
D - 68 mm
B - 12 mm
d1 - 52.6 mm
d2 - 52.6 mm
D1 - 60.4 mm
r1,2 - min. - 0.6 mm
r3,4 - min. - 0.3 mm
a - 13.6 mm
da - min. - 48.2 mm
db - min. - 48.2 mm
Da - max. - 64.8 mm
Db - max. - 66.6 mm
ra - max. - 0.6 mm
rb - max. - 0.3 mm
dn - 54.2 mm
Basic dynamic load rating - C - 13 kN
Basic static load rating - C0 - 9.5 kN
Fatigue load limit - Pu - 0.4 kN
Limiting speed for grease lubrication - 24000 r/min
Limiting speed for oil lubrication - 36000 mm/min
Ball - Dw - 6.35 mm
Ball - z - 23
Gref - 1.62 cm3
Calculation factor - f0 - 10.5
Preload class A - GA - 50 N
Preload class B - GB - 100 N
Preload class C - GC - 200 N
Preload class D - GD - 400 N
Calculation factor - f - 1.11
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 - 44 N/micron
Preload class B - 59 N/micron
Preload class C - 81 N/micron
Preload class D - 115 N/micron
Mass bearing - 0.12 kg
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