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


Bearing No. 4CR680D

Specification data (main dimensions, etc.)

d(mm)680
D(mm)1020
B(mm)680
C(mm)680
Fw(mm)775
r(min.)(mm)5
r1(min.)(mm)SP
Basic load ratings : Cr(kN)21600
Basic load ratings : C0r(kN)49200
Fatigue load limit : Cu(kN)4070

Mounting dimensions,weight (reference)

da(min.)(mm)719 mm
Da(max.)(mm)998 mm
da(min.)(mm)946 mm
ra(max.)(mm)4 mm
rb(max.)(mm)8 mm
Mass(Refer.)(kg)2040 kg
JTEKT

2026/07/19