Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Inch series
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Bearing No. 28985/21

Specifications
(Boundary dimensions ...etc)

d(mm)60.325
D(mm)100.000
T(mm)25.400
B(mm)25.400
C(mm)19.845
r(min.)(mm)3.6
r1(min.)(mm)3.2
Basic load ratings : Cr(kN)115
Basic load ratings : C0r(kN)137
Fatigue load limit : Cu(kN)20.6
Limiting speeds(Grease lub.)(min-1)3700
Limiting speeds(Oil lub.)(min-1)4900
Load center spread : a(mm)22.8
Constant :e()0.43
Axial load factors : Y1()1.41
Axial load factors : Y0()0.78

Mounting dimensions

da(mm)73.0
db(mm)67.0
Da(mm)89.0
Db(mm)96.0
ra(max.)(mm)3.6
rb(max.)(mm)3.2

Refer.

(Refer.)Mass(kg) 0.763
JTEKT

2025/06/01