Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series
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Bearing No. 30312DJR

Specifications
(Boundary dimensions ...etc)

d(mm)60
D(mm)130
T(mm)33.5
B(mm)31
C(mm)22
r(min.)(mm)3
r1(min.)(mm)2.5
Basic load ratings : Cr(kN)191
Basic load ratings : C0r(kN)179
Fatigue load limit : Cu(kN)27.1
Limiting speeds(Grease lub.)(min-1)2600
Limiting speeds(Oil lub.)(min-1)3700
Load center spread : a(mm)40.8
Constant e()0.83
Axial load factors : Y1()0.73
Axial load factors : Y0()0.40

Mounting dimensions

da(min.)(mm)74
db(max.)(mm)73
Da(max.)(mm)118
Da(min.)(mm)103
Db(min.)(mm)124
Sa(min.)(mm)4
Sb(min.)(mm)11.5
ra(max.)(mm)2.5
rb(max.)(mm)2

Refer.

(Refer.)Mass(kg) 2.01
JTEKT

2025/05/29