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


Bearing No. 30221JR

Specification data (main 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 e0.42
Axial load factors : Y11.43
Axial load factors : Y00.79

Mounting dimensions,weight (reference)

da(min.)(mm)119 mm
db(max.)(mm)122 mm
Da(max.)(mm)178 mm
da(min.)(mm)165 mm
db(min.)(mm)178 mm
Sa(min.)(mm)6 mm
Sb(min.)(mm)9 mm
ra(max.)(mm)2.5 mm
rb(max.)(mm)2 mm
Mass(Refer.)(kg)4.49 kg
JTEKT

2026/07/19