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


Bearing No. 30321

Specification data (main dimensions, etc.)

d(mm)105
D(mm)225
T(mm)53.5
B(mm)49
C(mm)41
r(min.)(mm)4
r1(min.)(mm)3
Basic load ratings : Cr(kN)464
Basic load ratings : C0r(kN)432
Fatigue load limit : Cu(kN)56.0
Limiting speeds(Grease lub.)(min-1)1700
Limiting speeds(Oil lub.)(min-1)2300
Load center spread : a(mm)43.1
Constant e0.35
Axial load factors : Y11.73
Axial load factors : Y00.95

Mounting dimensions,weight (reference)

da(min.)(mm)123 mm
db(max.)(mm)132 mm
Da(max.)(mm)211 mm
da(min.)(mm)193 mm
db(min.)(mm)209 mm
Sa(min.)(mm)7 mm
Sb(min.)(mm)12.5 mm
ra(max.)(mm)3 mm
rb(max.)(mm)2.5 mm
Mass(Refer.)(kg)8.74 kg
JTEKT

2026/07/02