Koyo
FOR REFERENCE ONLY
  • Rolling mill roll neck bearings
  • Four-row tapered roller bearings
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Bearing No. M263349D/310/310D

Specifications
(Boundary dimensions ...etc)

d(mm)355.600
D(mm)488.950
T(mm)317.500
W(mm)317.500
r(min.)(mm)3.2
r1(min.)(mm)1.6
Basic load ratings : Cr(kN)4690
Basic load ratings : C0r(kN)10900
Fatigue load limit : Cu(kN)1060
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)383
Da(max.)(mm)474
Da(max.)(mm)452
S(min.)(mm)7.5
ra(max.)(mm)3.2
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) 182
JTEKT

2025/06/01