Koyo
FOR REFERENCE ONLY
  • Rolling mill roll neck bearings
  • Four-row tapered roller bearings
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Bearing No. M249748D/710/710D

Specifications
(Boundary dimensions ...etc)

d(mm)254.000
D(mm)358.775
T(mm)269.875
W(mm)269.875
r(min.)(mm)3.2
r1(min.)(mm)3.2
Basic load ratings : Cr(kN)2840
Basic load ratings : C0r(kN)6340
Fatigue load limit : Cu(kN)665
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)277
Da(max.)(mm)345
Da(max.)(mm)330
S(min.)(mm)8
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) 86
JTEKT

2025/06/01