Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Inch series
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Bearing No. 45284/20

Specifications
(Boundary 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 :e()0.33
Axial load factors : Y1()1.80
Axial load factors : Y0()0.99

Mounting dimensions

da(mm)71.0
db(mm)59.0
Da(mm)93.0
Db(mm)99.0
ra(max.)(mm)6.4
rb(max.)(mm)3.2

Refer.

(Refer.)Mass(kg) 1.218
JTEKT

2025/06/01