Koyo
FOR REFERENCE ONLY
  • Rolling mill roll neck bearings
  • Four-row cylindrical roller bearings
>

Bearing No. 4CR300

Specifications
(Boundary dimensions ...etc)

d(mm)300
D(mm)420
B(mm)300
C(mm)300
Fw(mm)332
r(min.)(mm)3
r1(min.)(mm)3
Basic load ratings : Cr(kN)3620
Basic load ratings : C0r(kN)7840
Fatigue load limit : Cu(kN)817

Mounting dimensions

da(min.)(mm)314
Da(max.)(mm)406
da(min.)(mm)392
ra(max.)(mm)2.5
rb(max.)(mm)2.5

Refer.

(Refer.)Mass(kg) 125
JTEKT

2025/06/01