Angular contact ball bearings, super-precision 71820 CD/P4
Bearing number : 71820 CD/P4
Size (mm) : 100x125x13
Brand : SKF
Bore Diameter (mm) : 100
Outer Diameter (mm) : 125
Width (mm) : 13
Bearing dimensions and specification in SKF catalogue:
d - 100 mm
D - 125 mm
B - 13 mm
d1 - 108.2 mm
d2 - 108.2 mm
D1 - 117 mm
r1,2 - min. - 1 mm
r3,4 - min. - 0.3 mm
a - 21.6 mm
da - min. - 104.6 mm
db - min. - 104.6 mm
Da - max. - 120.4 mm
Db - max. - 123 mm
ra - max. - 1 mm
rb - max. - 0.3 mm
dn - 109.1 mm
Basic dynamic load rating - C - 22.5 kN
Basic static load rating - C0 - 29 kN
Fatigue load limit - Pu - 1.2 kN
Limiting speed for grease lubrication - 9000 r/min
Limiting speed for oil lubrication - 14000 mm/min
Ball - Dw - 7.144 mm
Ball - z - 34
Gref - 3.2 cm3
Calculation factor - f0 - 17.4
Preload class A - GA - 120 N
Preload class B - GB - 360 N
Preload class C - GC - 720 N
Calculation factor - f - 1.4
Calculation factor - f1 - 1
Calculation factor - f2A - 1
Calculation factor - f2B - 1.09
Calculation factor - f2C - 1.16
Calculation factor - fHC - 1
Preload class A - 90 N/micron
Preload class B - 156 N/micron
Preload class C - 231 N/micron
Mass bearing - 0.31 kg
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