Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series
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Bearing No. 30313JR

Specifications
(Boundary dimensions ...etc)

d(mm)65
D(mm)140
T(mm)36
B(mm)33
C(mm)28
r(min.)(mm)3
r1(min.)(mm)2.5
Basic load ratings : Cr(kN)255
Basic load ratings : C0r(kN)239
Fatigue load limit : Cu(kN)37.6
Limiting speeds(Grease lub.)(min-1)2800
Limiting speeds(Oil lub.)(min-1)3800
Load center spread : a(mm)29.3
Constant e()0.35
Axial load factors : Y1()1.74
Axial load factors : Y0()0.96

Mounting dimensions

da(min.)(mm)79
db(max.)(mm)83
Da(max.)(mm)128
Da(min.)(mm)122
Db(min.)(mm)130
Sa(min.)(mm)4
Sb(min.)(mm)8
ra(max.)(mm)2.5
rb(max.)(mm)2

Refer.

(Refer.)Mass(kg) 2.56
JTEKT

2025/07/01