Angular contact ball bearings, super-precision 7209 ACD/HCP4A
Bearing number : 7209 ACD/HCP4A
Size (mm) : 45x85x19
Brand : SKF
Bore Diameter (mm) : 45
Outer Diameter (mm) : 85
Width (mm) : 19
Bearing dimensions and specification in SKF catalogue:
d - 45 mm
D - 85 mm
B - 19 mm
d1 - 57.3 mm
d2 - 57.3 mm
D1 - 72.7 mm
r1,2 - min. - 1.1 mm
r3,4 - min. - 0.6 mm
a - 24.8 mm
da - min. - 52 mm
db - min. - 52 mm
Da - max. - 78 mm
Db - max. - 80.8 mm
ra - max. - 1 mm
rb - max. - 0.6 mm
dn - 60.6 mm
Basic dynamic load rating - C - 41 kN
Basic static load rating - C0 - 30 kN
Fatigue load limit - Pu - 1.2 kN
Limiting speed for grease lubrication - 17000 r/min
Limiting speed for oil lubrication - 28000 mm/min
Ball - Dw - 12.7 mm
Ball - z - 14
Gref - 5.922 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 - 260 N
Preload class B - GB - 520 N
Preload class C - GC - 1040 N
Preload class D - GD - 2080 N
Calculation factor - f - 1.07
Calculation factor - f1 - 0.99
Calculation factor - f2A - 1
Calculation factor - f2B - 1.01
Calculation factor - f2C - 1.03
Calculation factor - f2D - 1.06
Calculation factor - fHC - 1.01
Preload class A - 162 N/micron
Preload class B - 211 N/micron
Preload class C - 280 N/micron
Preload class D - 378 N/micron
Mass bearing - 0.339 kg
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