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Bearing 678A (NTN)
Deep groove ball bearings 678A
Bearing number : 678A
Size (mm) : 8x12x2.5
Brand : NTN
Bore Diameter (mm) : 8
Outer Diameter (mm) : 12
Width (mm) : 2,5
Bearing dimensions and specification in NTN catalogue:
d - 8 mm
D - 12 mm
B - 2,5 mm
C - 2,5 mm
r min. - 0,1 mm
da min. - 8,8 mm
da max - 9,1 mm
Da max. - 11,2 mm
ra max. - 0,1 mm
Weight - 0,75 Kg
Basic dynamic load rating (C) - 0,515 kN
Basic static load rating (C0) - 0,252 kN
(Grease) Lubrication Speed - 38 000 r/min
(Oil) Lubrication Speed - 45 000 r/min
Calculation factor (f0) - 15,9
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