Angular contact ball bearings, super-precision 7028 ACD/P4A
Bearing number : 7028 ACD/P4A
Size (mm) : 140x210x33
Brand : SKF
Bore Diameter (mm) : 140
Outer Diameter (mm) : 210
Width (mm) : 33
Bearing dimensions and specification in SKF catalogue:
d - 140 mm
D - 210 mm
B - 33 mm
d1 - 161.6 mm
d2 - 161.6 mm
D1 - 188.4 mm
r1,2 - min. - 2 mm
r3,4 - min. - 1 mm
a - 57.5 mm
da - min. - 149 mm
db - min. - 149 mm
Da - max. - 201 mm
Db - max. - 205 mm
ra - max. - 2 mm
rb - max. - 1 mm
dn - 166.3 mm
Basic dynamic load rating - C - 146 kN
Basic static load rating - C0 - 156 kN
Fatigue load limit - Pu - 5.1 kN
Limiting speed for grease lubrication - 5600 r/min
Limiting speed for oil lubrication - 8500 mm/min
Ball - Dw - 22.225 mm
Ball - z - 22
Gref - 45 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 - 900 N
Preload class B - GB - 1800 N
Preload class C - GC - 3600 N
Preload class D - GD - 7200 N
Calculation factor - f - 1.16
Calculation factor - f1 - 0.99
Calculation factor - f2A - 1
Calculation factor - f2B - 1.02
Calculation factor - f2C - 1.05
Calculation factor - f2D - 1.08
Calculation factor - fHC - 1
Preload class A - 364 N/micron
Preload class B - 477 N/micron
Preload class C - 633 N/micron
Preload class D - 856 N/micron
Mass bearing - 3.421 kg
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