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

Bearing No. LM258649D/610/610D

Specifications
(Boundary dimensions ...etc)

d(mm)317.500
D(mm)422.275
T(mm)269.875
W(mm)269.875
r(min.)(mm)3.2
r1(min.)(mm)1.6
Basic load ratings : Cr(kN)3140
Basic load ratings : C0r(kN)7450
Fatigue load limit : Cu(kN)747
Axial load factors : Y2(mm)2.12
Axial load factors : Y3()3.15
Axial load factors : Y0()2.07
Constant e()0.32

Mounting dimensions

da(min.)(mm)341
Da(max.)(mm)407
Da(max.)(mm)392
S(min.)(mm)8.5
ra(max.)(mm)3.2
rb(max.)(mm)1.6
Axial load factors : Y2(mm)2.12
Axial load factors : Y3()3.15
Axial load factors : Y0()2.07
Constant e()0.32

Refer.

(Refer.)Mass(kg) 104
JTEKT

2025/06/01