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Bearing 638 (NSK)
Deep groove ball bearings 638
Bearing number : 638
Size (mm) : 8x28x9
Brand : NSK
Bore Diameter (mm) : 8
Outer Diameter (mm) : 28
Width (mm) : 9
Bearing dimensions and specification in NSK catalogue:
d - 8 mm
D - 28 mm
B - 9 mm
C - 9 mm
r min. - 0,3 mm
da min. - 10 mm
Da max. - 26 mm
ra max. - 0,3 mm
Weight - 0,0283 Kg
Basic dynamic load rating (C) - 4,55 kN
Basic static load rating (C0) - 1,97 kN
(Grease) Lubrication Speed - 28 000 r/min
(Oil) Lubrication Speed - 34 000 r/min
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