Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series
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Bearing No. 30309JR

Specifications
(Boundary dimensions ...etc)

d(mm)45
D(mm)100
T(mm)27.25
B(mm)25
C(mm)22
r(min.)(mm)2
r1(min.)(mm)1.5
Basic load ratings : Cr(kN)141
Basic load ratings : C0r(kN)128
Fatigue load limit : Cu(kN)19.9
Limiting speeds(Grease lub.)(min-1)4100
Limiting speeds(Oil lub.)(min-1)5400
Load center spread : a(mm)21.3
Constant e()0.35
Axial load factors : Y1()1.74
Axial load factors : Y0()0.96

Mounting dimensions

da(min.)(mm)55
db(max.)(mm)59
Da(max.)(mm)90
Da(min.)(mm)86
Db(min.)(mm)93
Sa(min.)(mm)3
Sb(min.)(mm)5
ra(max.)(mm)2
rb(max.)(mm)1.5

Refer.

(Refer.)Mass(kg) 1.01
JTEKT

2025/05/12