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


Bearing No. 30306DJR

Specification data (main dimensions, etc.)

d(mm)30
D(mm)72
T(mm)20.75
B(mm)19
C(mm)14
r(min.)(mm)1.5
r1(min.)(mm)1.5
Basic load ratings : Cr(kN)63.5
Basic load ratings : C0r(kN)54.9
Fatigue load limit : Cu(kN)7.70
Limiting speeds(Grease lub.)(min-1)4900
Limiting speeds(Oil lub.)(min-1)6800
Load center spread : a(mm)23.7
Constant e0.83
Axial load factors : Y10.73
Axial load factors : Y00.40

Mounting dimensions,weight (reference)

da(min.)(mm)38.5 mm
db(max.)(mm)40 mm
Da(max.)(mm)63.5 mm
da(min.)(mm)55 mm
db(min.)(mm)68 mm
Sa(min.)(mm)3 mm
Sb(min.)(mm)6.5 mm
ra(max.)(mm)1.5 mm
rb(max.)(mm)1.5 mm
Mass(Refer.)(kg)0.400 kg
JTEKT

2026/07/01