Angular contact ball bearings, super-precision 71948 CD/P4A
Bearing number : 71948 CD/P4A
Size (mm) : 240x320x38
Brand : SKF
Bore Diameter (mm) : 240
Outer Diameter (mm) : 320
Width (mm) : 38
Bearing dimensions and specification in SKF catalogue:
d - 240 mm
D - 320 mm
B - 38 mm
d1 - 264.7 mm
d2 - 264.7 mm
D1 - 295.3 mm
r1,2 - min. - 2.1 mm
r3,4 - min. - 1 mm
a - 56.6 mm
da - min. - 251 mm
db - min. - 251 mm
Da - max. - 309 mm
Db - max. - 315 mm
ra - max. - 2 mm
rb - max. - 1 mm
dn - 271.4 mm
Basic dynamic load rating - C - 229 kN
Basic static load rating - C0 - 325 kN
Fatigue load limit - Pu - 8.2 kN
Limiting speed for grease lubrication - 3800 r/min
Limiting speed for oil lubrication - 5600 mm/min
Ball - Dw - 25.4 mm
Ball - z - 31
Gref - 93 cm3
Calculation factor - f0 - 16.7
Preload class A - GA - 860 N
Preload class B - GB - 1720 N
Preload class C - GC - 3440 N
Preload class D - GD - 6880 N
Calculation factor - f - 1.32
Calculation factor - f1 - 1
Calculation factor - f2A - 1
Calculation factor - f2B - 1.04
Calculation factor - f2C - 1.09
Calculation factor - f2D - 1.15
Calculation factor - fHC - 1
Preload class A - 237 N/micron
Preload class B - 325 N/micron
Preload class C - 461 N/micron
Preload class D - 678 N/micron
Mass bearing - 8.5 kg
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