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


Bearing No. 30212JR

Specification data (main dimensions, etc.)

d(mm)60
D(mm)110
T(mm)23.75
B(mm)22
C(mm)19
r(min.)(mm)2
r1(min.)(mm)1.5
Basic load ratings : Cr(kN)133
Basic load ratings : C0r(kN)127
Fatigue load limit : Cu(kN)19.7
Limiting speeds(Grease lub.)(min-1)3500
Limiting speeds(Oil lub.)(min-1)4700
Load center spread : a(mm)21.9
Constant e0.40
Axial load factors : Y11.48
Axial load factors : Y00.81

Mounting dimensions,weight (reference)

da(min.)(mm)70 mm
db(max.)(mm)70 mm
Da(max.)(mm)100 mm
da(min.)(mm)96 mm
db(min.)(mm)103 mm
Sa(min.)(mm)4 mm
Sb(min.)(mm)4.5 mm
ra(max.)(mm)2 mm
rb(max.)(mm)1.5 mm
Mass(Refer.)(kg)0.945 kg
JTEKT

2026/07/01