Koyo
FOR REFERENCE ONLY
  • Deep groove ball bearings
  • Double-row
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Bearing No. 4304

Specifications
(Boundary dimensions ...etc)

d(mm)20
D(mm)52
B(mm)21
r(min.)(mm)1.1
Basic load ratings : Cr(kN)24.3
Basic load ratings : C0r(kN)17.0
Fatigue load limit : Cu(kN)1.25
factor : f0()13.5
Limiting speeds(Grease lub.)(min-1)8300
Limiting speeds(Oil lub.)(min-1)11000

Mounting dimensions

Da(max.)(mm)45.5
ra(max.)(mm)1

Refer.

(Refer.)Mass(kg) 0.227
JTEKT

2025/06/08