Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series
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Bearing No. 30238JR

Specifications
(Boundary dimensions ...etc)

d(mm)190
D(mm)340
T(mm)60
B(mm)55
C(mm)46
r(min.)(mm)5
r1(min.)(mm)4
Basic load ratings : Cr(kN)912
Basic load ratings : C0r(kN)1030
Fatigue load limit : Cu(kN)118
Limiting speeds(Grease lub.)(min-1)1000
Limiting speeds(Oil lub.)(min-1)1300
Load center spread : a(mm)66.4
Constant e()0.44
Axial load factors : Y1()1.38
Axial load factors : Y0()0.76

Mounting dimensions

da(min.)(mm)212
db(max.)(mm)225
Da(max.)(mm)322
Da(min.)(mm)298
Db(min.)(mm)318
Sa(min.)(mm)12
Sb(min.)(mm)13
ra(max.)(mm)4
rb(max.)(mm)3

Refer.

(Refer.)Mass(kg) 21.9
JTEKT

2025/06/01