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


Bearing No. 30318DR

Specification data (main dimensions, etc.)

d(mm)90
D(mm)190
T(mm)46.5
B(mm)43
C(mm)30
r(min.)(mm)4
r1(min.)(mm)3
Basic load ratings : Cr(kN)352
Basic load ratings : C0r(kN)336
Fatigue load limit : Cu(kN)44.9
Limiting speeds(Grease lub.)(min-1)1700
Limiting speeds(Oil lub.)(min-1)2400
Load center spread : a(mm)59.1
Constant e0.81
Axial load factors : Y10.74
Axial load factors : Y00.41

Mounting dimensions,weight (reference)

da(min.)(mm)108 mm
db(max.)(mm)109 mm
Da(max.)(mm)176 mm
da(min.)(mm)151 mm
db(min.)(mm)179 mm
Sa(min.)(mm)6 mm
Sb(min.)(mm)16.5 mm
ra(max.)(mm)3 mm
rb(max.)(mm)2.5 mm
Mass(Refer.)(kg)5.60 kg
JTEKT

2026/07/04