Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series
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Bearing No. 30318DR

Specifications
(Boundary 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 e()0.81
Axial load factors : Y1()0.74
Axial load factors : Y0()0.41

Mounting dimensions

da(min.)(mm)108
db(max.)(mm)109
Da(max.)(mm)176
Da(min.)(mm)151
Db(min.)(mm)179
Sa(min.)(mm)6
Sb(min.)(mm)16.5
ra(max.)(mm)3
rb(max.)(mm)2.5

Refer.

(Refer.)Mass(kg) 5.60
JTEKT

2025/06/11