Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series
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Bearing No. 30321D

Specifications
(Boundary dimensions ...etc)

d(mm)105
D(mm)225
T(mm)53.5
B(mm)49
C(mm)36
r(min.)(mm)4
r1(min.)(mm)3
Basic load ratings : Cr(kN)423
Basic load ratings : C0r(kN)396
Fatigue load limit : Cu(kN)50.1
Limiting speeds(Grease lub.)(min-1)1400
Limiting speeds(Oil lub.)(min-1)2000
Load center spread : a(mm)69.1
Constant e()0.81
Axial load factors : Y1()0.74
Axial load factors : Y0()0.41

Mounting dimensions

da(min.)(mm)123
db(max.)(mm)127
Da(max.)(mm)211
Da(min.)(mm)193
Db(min.)(mm)209
Sa(min.)(mm)6
Sb(min.)(mm)17
ra(max.)(mm)3
rb(max.)(mm)2.5

Refer.

(Refer.)Mass(kg) 8.76
JTEKT

2025/06/01