Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Inch series
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Bearing No. 28158/300

Specifications
(Boundary dimensions ...etc)

d(mm)40.000
D(mm)76.200
T(mm)20.638
B(mm)20.940
C(mm)15.507
r(min.)(mm)1.6
r1(min.)(mm)1.2
Basic load ratings : Cr(kN)71.6
Basic load ratings : C0r(kN)65.9
Fatigue load limit : Cu(kN)9.70
Limiting speeds(Grease lub.)(min-1)5300
Limiting speeds(Oil lub.)(min-1)7000
Load center spread : a(mm)16.5
Constant :e()0.40
Axial load factors : Y1()1.49
Axial load factors : Y0()0.82

Mounting dimensions

da(mm)47.5
db(mm)45.0
Da(mm)68.0
Db(mm)71.0
ra(max.)(mm)1.6
rb(max.)(mm)1.2

Refer.

(Refer.)Mass(kg) 0.403
JTEKT

2025/07/03