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

Specifications
(Boundary dimensions ...etc)

d(mm)60
D(mm)130
T(mm)33.5
B(mm)31
C(mm)23
r(min.)(mm)3
r1(min.)(mm)2.5
Basic load ratings : Cr(kN)211
Basic load ratings : C0r(kN)196
Fatigue load limit : Cu(kN)30.5
Limiting speeds(Grease lub.)(min-1)3100
Limiting speeds(Oil lub.)(min-1)4200
Load center spread : a(mm)31.9
Constant e()0.55
Axial load factors : Y1()1.10
Axial load factors : Y0()0.60

Mounting dimensions

da(min.)(mm)74
db(max.)(mm)75
Da(max.)(mm)118
Da(min.)(mm)105
Db(min.)(mm)121
Sa(min.)(mm)5
Sb(min.)(mm)10.5
ra(max.)(mm)2.5
rb(max.)(mm)2

Refer.

(Refer.)Mass(kg) 1.99
JTEKT

2025/06/01