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

Bearing No. 4TR686D

Specifications
(Boundary dimensions ...etc)

d(mm)685.800
D(mm)876.300
T(mm)355.600
W(mm)352.425
r(min.)(mm)6.4
r1(min.)(mm)3.2
Basic load ratings : Cr(kN)7950
Basic load ratings : C0r(kN)23100
Fatigue load limit : Cu(kN)1880
Axial load factors : Y2(mm)1.62
Axial load factors : Y3()2.42
Axial load factors : Y0()1.59
Constant e()0.42

Mounting dimensions

da(min.)(mm)734
Da(max.)(mm)852
Da(max.)(mm)823
S(min.)(mm)11
ra(max.)(mm)6.4
rb(max.)(mm)3.2
Axial load factors : Y2(mm)1.62
Axial load factors : Y3()2.42
Axial load factors : Y0()1.59
Constant e()0.42

Refer.

(Refer.)Mass(kg) 555
JTEKT

2025/06/01