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Bearing 684 (KOYO)
Deep groove ball bearings 684
Bearing number : 684
Size (mm) : 4x9x2.5
Brand : KOYO
Bore Diameter (mm) : 4
Outer Diameter (mm) : 9
Width (mm) : 2,5
Bearing dimensions and specification in KOYO catalogue:
d - 4 mm
D - 9 mm
B - 2,5 mm
C - 2,5 mm
r min. - 0,15 mm
r1 min. - 0,15 mm
da min. - 5,2 mm
Da max. - 7,8 mm
ra max. - 0,1 mm
Weight - 0,0006 Kg
Basic dynamic load rating (C) - 0,64 kN
Basic static load rating (C0) - 0,23 kN
(Grease) Lubrication Speed - 59000 r/min
(Oil) Lubrication Speed - 70000 r/min
Calculation factor (f0) - 12,8
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