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Bearing W638/4-2Z (SKF)
Deep groove ball bearings W638/4-2Z
Bearing number : W638/4-2Z
Size (mm) : 4x9x4
Brand : SKF
Bore Diameter (mm) : 4
Outer Diameter (mm) : 9
Width (mm) : 4
Bearing dimensions and specification in SKF catalogue:
d - 4 mm
D - 9 mm
B - 4 mm
C - 4 mm
d1 - 5,2 mm
d2 - – mm
r1 min. - 4,8 mm
r2 min. - 4,8 mm
D1 - 8,1 mm
D2 - 0,1 mm
da min. - 5,1 mm
Da max. - 8,2 mm
ra max. - 0,1 mm
Weight - 0,0009 Kg
Basic dynamic load rating (C) - 0,364 kN
Basic static load rating (C0) - 0,114 kN
Fatigue load limit (Pu) - 0,005
Reference speed - 140000 r/min
Limiting speed - 70000 r/min
Calculation factor (f0) - 6,5
Calculation factor (kr) - 0,02
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Outer Dia, mm:
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