Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series


Bearing No. 30312DJR

Specification data (main 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 e0.83
Axial load factors : Y10.73
Axial load factors : Y00.40

Mounting dimensions,weight (reference)

da(min.)(mm)74 mm
db(max.)(mm)73 mm
Da(max.)(mm)118 mm
da(min.)(mm)103 mm
db(min.)(mm)124 mm
Sa(min.)(mm)4 mm
Sb(min.)(mm)11.5 mm
ra(max.)(mm)2.5 mm
rb(max.)(mm)2 mm
Mass(Refer.)(kg)2.01 kg
JTEKT

2026/07/04