Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series
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Bearing No. 30209JR

Specifications
(Boundary dimensions ...etc)

d(mm)45
D(mm)85
T(mm)20.75
B(mm)19
C(mm)16
r(min.)(mm)1.5
r1(min.)(mm)1.5
Basic load ratings : Cr(kN)83.9
Basic load ratings : C0r(kN)77.4
Fatigue load limit : Cu(kN)11.6
Limiting speeds(Grease lub.)(min-1)4600
Limiting speeds(Oil lub.)(min-1)6100
Load center spread : a(mm)18.9
Constant e()0.40
Axial load factors : Y1()1.48
Axial load factors : Y0()0.81

Mounting dimensions

da(min.)(mm)53.5
db(max.)(mm)54
Da(max.)(mm)76.5
Da(min.)(mm)74
Db(min.)(mm)80
Sa(min.)(mm)3
Sb(min.)(mm)4.5
ra(max.)(mm)1.5
rb(max.)(mm)1.5

Refer.

(Refer.)Mass(kg) 0.502
JTEKT

2025/06/08