Koyo
FOR REFERENCE ONLY
  • Rolling mill roll neck bearings
  • Four-row tapered roller bearings
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Bearing No. M257149D/110/110D

Specifications
(Boundary dimensions ...etc)

d(mm)304.800
D(mm)419.100
T(mm)269.875
W(mm)269.875
r(min.)(mm)6.4
r1(min.)(mm)1.6
Basic load ratings : Cr(kN)3030
Basic load ratings : C0r(kN)6950
Fatigue load limit : Cu(kN)699
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)331
Da(max.)(mm)398
Da(max.)(mm)387
S(min.)(mm)7
ra(max.)(mm)6.4
rb(max.)(mm)1.6
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) 110
JTEKT

2025/06/01