Angular contact ball bearings, super-precision 7221 ACD/P4A
Bearing number : 7221 ACD/P4A
Size (mm) : 105x190x36
Brand : SKF
Bore Diameter (mm) : 105
Outer Diameter (mm) : 190
Width (mm) : 36
Bearing dimensions and specification in SKF catalogue:
d - 105 mm
D - 190 mm
B - 36 mm
d1 - 131.2 mm
d2 - 131.2 mm
D1 - 163.8 mm
r1,2 - min. - 2.1 mm
r3,4 - min. - 1.1 mm
a - 52.6 mm
da - min. - 117 mm
db - min. - 117 mm
Da - max. - 178 mm
Db - max. - 183 mm
ra - max. - 2 mm
rb - max. - 1 mm
dn - 138.4 mm
Basic dynamic load rating - C - 163 kN
Basic static load rating - C0 - 146 kN
Fatigue load limit - Pu - 5.1 kN
Limiting speed for grease lubrication - 6700 r/min
Limiting speed for oil lubrication - 10000 mm/min
Ball - Dw - 26.988 mm
Ball - z - 15
Gref - 48.333 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 - 1000 N
Preload class B - GB - 2000 N
Preload class C - GC - 4000 N
Preload class D - GD - 8000 N
Calculation factor - f - 1.08
Calculation factor - f1 - 0.99
Calculation factor - f2A - 1
Calculation factor - f2B - 1.01
Calculation factor - f2C - 1.02
Calculation factor - f2D - 1.05
Calculation factor - fHC - 1
Preload class A - 308 N/micron
Preload class B - 399 N/micron
Preload class C - 527 N/micron
Preload class D - 708 N/micron
Mass bearing - 3.868 kg
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