Koyo
FOR REFERENCE ONLY
  • Rolling mill roll neck bearings
  • Four-row tapered roller bearings
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Bearing No. 4TR660D

Specifications
(Boundary dimensions ...etc)

d(mm)660
D(mm)855
T(mm)320
W(mm)320
r(min.)(mm)4
r1(min.)(mm)5
Basic load ratings : Cr(kN)6800
Basic load ratings : C0r(kN)18000
Fatigue load limit : Cu(kN)1510
Axial load factors : Y2(mm)1.43
Axial load factors : Y3()2.12
Axial load factors : Y0()1.40
Constant e()0.47

Mounting dimensions

da(min.)(mm)705
Da(max.)(mm)837
Da(max.)(mm)799
S(min.)(mm)11.5
ra(max.)(mm)3
rb(max.)(mm)4
Axial load factors : Y2(mm)1.43
Axial load factors : Y3()2.12
Axial load factors : Y0()1.40
Constant e()0.47

Refer.

(Refer.)Mass(kg) 481
JTEKT

2025/06/01