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


Bearing No. 30313JR

Specification data (main dimensions, etc.)

d(mm)65
D(mm)140
T(mm)36
B(mm)33
C(mm)28
r(min.)(mm)3
r1(min.)(mm)2.5
Basic load ratings : Cr(kN)255
Basic load ratings : C0r(kN)239
Fatigue load limit : Cu(kN)37.6
Limiting speeds(Grease lub.)(min-1)2800
Limiting speeds(Oil lub.)(min-1)3800
Load center spread : a(mm)29.3
Constant e0.35
Axial load factors : Y11.74
Axial load factors : Y00.96

Mounting dimensions,weight (reference)

da(min.)(mm)79 mm
db(max.)(mm)83 mm
Da(max.)(mm)128 mm
da(min.)(mm)122 mm
db(min.)(mm)130 mm
Sa(min.)(mm)4 mm
Sb(min.)(mm)8 mm
ra(max.)(mm)2.5 mm
rb(max.)(mm)2 mm
Mass(Refer.)(kg)2.56 kg
JTEKT

2026/07/05