Angular contact ball bearings, super-precision 71909 CE/HCP4A
Bearing number : 71909 CE/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 - 52.7 mm
d2 - 51 mm
D1 - 60.3 mm
r1,2 - min. - 0.6 mm
r3,4 - min. - 0.3 mm
a - 14 mm
da - min. - 48.2 mm
db - min. - 47 mm
Da - max. - 64.8 mm
Db - max. - 66 mm
ra - max. - 0.6 mm
rb - max. - 0.3 mm
dn - 54.2 mm
Basic dynamic load rating - C - 10.1 kN
Basic static load rating - C0 - 7 kN
Fatigue load limit - Pu - 0.29 kN
Limiting speed for grease lubrication - 34000 r/min
Limiting speed for oil lubrication - 52000 mm/min
Ball - Dw - 6.35 mm
Ball - z - 21
Gref - 1.5 cm3
Calculation factor - f0 - 8.4
Preload class A - GA - 55 N
Preload class B - GB - 166 N
Preload class C - GC - 331 N
Calculation factor - f - 1.09
Calculation factor - f1 - 1
Calculation factor - f2A - 1
Calculation factor - f2B - 1.05
Calculation factor - f2C - 1.09
Calculation factor - fHC - 1.01
Preload class A - 37 N/micron
Preload class B - 59 N/micron
Preload class C - 81 N/micron
Mass bearing - 0.117 kg
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