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

Bearing No. M252349D/310/310D

Specifications
(Boundary dimensions ...etc)

d(mm)269.875
D(mm)381.000
T(mm)282.575
W(mm)282.575
r(min.)(mm)3.2
r1(min.)(mm)3.2
Basic load ratings : Cr(kN)3150
Basic load ratings : C0r(kN)6690
Fatigue load limit : Cu(kN)697
Axial load factors : Y2(mm)2.03
Axial load factors : Y3()3.02
Axial load factors : Y0()1.98
Constant e()0.33

Mounting dimensions

da(min.)(mm)291
Da(max.)(mm)367
Da(max.)(mm)350
S(min.)(mm)6
ra(max.)(mm)3.2
rb(max.)(mm)3.2
Axial load factors : Y2(mm)2.03
Axial load factors : Y3()3.02
Axial load factors : Y0()1.98
Constant e()0.33

Refer.

(Refer.)Mass(kg) 98.4
JTEKT

2025/08/02