Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Inch series
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Bearing No. 28678/22

Specifications
(Boundary dimensions ...etc)

d(mm)50.800
D(mm)97.630
T(mm)24.608
B(mm)24.608
C(mm)19.446
r(min.)(mm)3.6
r1(min.)(mm)0.8
Basic load ratings : Cr(kN)113
Basic load ratings : C0r(kN)131
Fatigue load limit : Cu(kN)19.7
Limiting speeds(Grease lub.)(min-1)3900
Limiting speeds(Oil lub.)(min-1)5200
Load center spread : a(mm)21.2
Constant :e()0.40
Axial load factors : Y1()1.49
Axial load factors : Y0()0.82

Mounting dimensions

da(mm)65.0
db(mm)58.0
Da(mm)88.0
Db(mm)92.0
ra(max.)(mm)3.6
rb(max.)(mm)0.8

Refer.

(Refer.)Mass(kg) 0.836
JTEKT

2025/06/01