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


Bearing No. 30309CR

Specification data (main dimensions, etc.)

d(mm)45
D(mm)100
T(mm)27.25
B(mm)25
C(mm)20
r(min.)(mm)2
r1(min.)(mm)1.5
Basic load ratings : Cr(kN)136
Basic load ratings : C0r(kN)119
Fatigue load limit : Cu(kN)18.1
Limiting speeds(Grease lub.)(min-1)4100
Limiting speeds(Oil lub.)(min-1)5500
Load center spread : a(mm)25.7
Constant e0.55
Axial load factors : Y11.10
Axial load factors : Y00.60

Mounting dimensions,weight (reference)

da(min.)(mm)55 mm
db(max.)(mm)57 mm
Da(max.)(mm)90 mm
da(min.)(mm)81 mm
db(min.)(mm)94 mm
Sa(min.)(mm)4 mm
Sb(min.)(mm)7 mm
ra(max.)(mm)2 mm
rb(max.)(mm)1.5 mm
Mass(Refer.)(kg)1.00 kg
JTEKT

2026/07/02