Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series
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Bearing No. 30221JR

Specifications
(Boundary dimensions ...etc)

d(mm)105
D(mm)190
T(mm)39
B(mm)36
C(mm)30
r(min.)(mm)3
r1(min.)(mm)2.5
Basic load ratings : Cr(kN)360
Basic load ratings : C0r(kN)380
Fatigue load limit : Cu(kN)52.3
Limiting speeds(Grease lub.)(min-1)2000
Limiting speeds(Oil lub.)(min-1)2600
Load center spread : a(mm)39.0
Constant e()0.42
Axial load factors : Y1()1.43
Axial load factors : Y0()0.79

Mounting dimensions

da(min.)(mm)119
db(max.)(mm)122
Da(max.)(mm)178
Da(min.)(mm)165
Db(min.)(mm)178
Sa(min.)(mm)6
Sb(min.)(mm)9
ra(max.)(mm)2.5
rb(max.)(mm)2

Refer.

(Refer.)Mass(kg) 4.49
JTEKT

2025/06/09