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


Bearing No. 30328JR

Specification data (main dimensions, etc.)

d(mm)140
D(mm)300
T(mm)67.75
B(mm)62
C(mm)53
r(min.)(mm)5
r1(min.)(mm)4
Basic load ratings : Cr(kN)938
Basic load ratings : C0r(kN)962
Fatigue load limit : Cu(kN)114
Limiting speeds(Grease lub.)(min-1)1300
Limiting speeds(Oil lub.)(min-1)1700
Load center spread : a(mm)56.9
Constant e0.35
Axial load factors : Y11.74
Axial load factors : Y00.96

Mounting dimensions,weight (reference)

da(min.)(mm)162 mm
db(max.)(mm)179 mm
Da(max.)(mm)282 mm
da(min.)(mm)254 mm
db(min.)(mm)273 mm
Sa(min.)(mm)10 mm
Sb(min.)(mm)14.5 mm
ra(max.)(mm)4 mm
rb(max.)(mm)3 mm
Mass(Refer.)(kg)22.6 kg
JTEKT

2026/08/11