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


Bearing No. 45284/20

Specification data (main dimensions, etc.)

d(mm)50.800
D(mm)104.775
T(mm)30.162
B(mm)30.958
C(mm)23.812
r(min.)(mm)6.4
r1(min.)(mm)3.2
Basic load ratings : Cr(kN)157
Basic load ratings : C0r(kN)165
Fatigue load limit : Cu(kN)25.6
Limiting speeds(Grease lub.)(min-1)3700
Limiting speeds(Oil lub.)(min-1)4900
Load center spread : a(mm)22.2
Constant :e0.33
Axial load factors : Y11.80
Axial load factors : Y00.99

Mounting dimensions,weight (reference)

da(mm)71.0 mm
db(mm)59.0 mm
Da(mm)93.0 mm
Db(mm)99.0 mm
ra(max.)(mm)6.4 mm
rb(max.)(mm)3.2 mm
Mass(Refer.)(kg)1.218 kg
JTEKT

2026/07/05