Koyo
FOR REFERENCE ONLY
  • Rolling mill roll neck bearings
  • Four-row tapered roller bearings
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Bearing No. EE640193D/260/261D

Specifications
(Boundary dimensions ...etc)

d(mm)488.950
D(mm)660.400
T(mm)361.950
W(mm)365.125
r(min.)(mm)6.4
r1(min.)(mm)7.9
Basic load ratings : Cr(kN)6640
Basic load ratings : C0r(kN)15800
Fatigue load limit : Cu(kN)1430
Axial load factors : Y2(mm)2.20
Axial load factors : Y3()3.27
Axial load factors : Y0()2.15
Constant e()0.31

Mounting dimensions

da(min.)(mm)527
Da(max.)(mm)637
Da(max.)(mm)616
S(min.)(mm)11
ra(max.)(mm)6.4
rb(max.)(mm)7.9
Axial load factors : Y2(mm)2.20
Axial load factors : Y3()3.27
Axial load factors : Y0()2.15
Constant e()0.31

Refer.

(Refer.)Mass(kg) 357
JTEKT

2025/06/01