Koyo
FOR REFERENCE ONLY
  • Rolling mill roll neck bearings
  • Four-row tapered roller bearings
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Bearing No. HM256849D/810/810D

Specifications
(Boundary dimensions ...etc)

d(mm)300.038
D(mm)422.275
T(mm)311.150
W(mm)311.150
r(min.)(mm)3.2
r1(min.)(mm)3.2
Basic load ratings : Cr(kN)3650
Basic load ratings : C0r(kN)8050
Fatigue load limit : Cu(kN)818
Axial load factors : Y2(mm)2.00
Axial load factors : Y3()2.98
Axial load factors : Y0()1.96
Constant e()0.34

Mounting dimensions

da(min.)(mm)325
Da(max.)(mm)407
Da(max.)(mm)388
S(min.)(mm)7
ra(max.)(mm)3.2
rb(max.)(mm)3.2
Axial load factors : Y2(mm)2.00
Axial load factors : Y3()2.98
Axial load factors : Y0()1.96
Constant e()0.34

Refer.

(Refer.)Mass(kg) 136
JTEKT

2025/06/01