Angular contact ball bearings, super-precision 71909 ACE/HCP4A
Bearing number : 71909 ACE/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 - 20 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 - 9.8 kN
Basic static load rating - C0 - 6.6 kN
Fatigue load limit - Pu - 0.275 kN
Limiting speed for grease lubrication - 30000 r/min
Limiting speed for oil lubrication - 47000 mm/min
Ball - Dw - 6.35 mm
Ball - z - 21
Gref - 1.5 cm3
Calculation factor - e - 0.68
Calculation factor - Y2 - 0.87
Calculation factor - Y0 - 0.38
Calculation factor - X2 - 0.41
Calculation factor - Y1 - 0.92
Calculation factor - Y2 - 1.41
Calculation factor - Y0 - 0.76
Calculation factor - X2 - 0.67
Preload class A - GA - 88 N
Preload class B - GB - 265 N
Preload class C - GC - 529 N
Calculation factor - f - 1.09
Calculation factor - f1 - 0.98
Calculation factor - f2A - 1
Calculation factor - f2B - 1.04
Calculation factor - f2C - 1.08
Calculation factor - fHC - 1.01
Preload class A - 94 N/micron
Preload class B - 141 N/micron
Preload class C - 185 N/micron
Mass bearing - 0.117 kg
SKF 71909 ACE/HCP4A bearin
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