Angular contact ball bearings, four-point contact ball bearings QJ 1252 MA
Bearing number : QJ 1252 MA
Size (mm) : 260x480x90
Brand : SKF
Bore Diameter (mm) : 260
Outer Diameter (mm) : 480
Width (mm) : 90
Bearing dimensions and specification in SKF catalogue:
d - 260 mm
D - 480 mm
B - 90 mm
d1 - - 345 mm
D1 - - 395 mm
a - 370 mm
r1,2 - min. - 5 mm
da - min. - 282 mm
Da - max. - 458 mm
ra - max. - 4 mm
Basic dynamic load rating - C - 741 kN
Basic static load rating - C0 - 1460 kN
Fatigue load limit - Pu - 32 kN
Reference speed - 1300 r/min
Limiting speed - 2200 r/min
Calculation factor - ka - 0.9
Calculation factor - e - 1.34
Calculation factor - X - 0.54
Calculation factor - Y0 - 0.44
Calculation factor - Y1 - 0.47
Calculation factor - Y2 - 0.81
Mass bearing - 78.5 kg
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