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


Bearing No. 30310CR

Specification data (main dimensions, etc.)

d(mm)50
D(mm)110
T(mm)29.25
B(mm)27
C(mm)20
r(min.)(mm)2.5
r1(min.)(mm)2
Basic load ratings : Cr(kN)155
Basic load ratings : C0r(kN)143
Fatigue load limit : Cu(kN)21.9
Limiting speeds(Grease lub.)(min-1)3700
Limiting speeds(Oil lub.)(min-1)4900
Load center spread : a(mm)27.5
Constant e0.55
Axial load factors : Y11.10
Axial load factors : Y00.60

Mounting dimensions,weight (reference)

da(min.)(mm)62 mm
db(max.)(mm)64 mm
Da(max.)(mm)98 mm
da(min.)(mm)90 mm
db(min.)(mm)103 mm
Sa(min.)(mm)4 mm
Sb(min.)(mm)9 mm
ra(max.)(mm)2 mm
rb(max.)(mm)2 mm
Mass(Refer.)(kg)1.25 kg
JTEKT

2026/07/08