Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Inch series
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Bearing No. 47678R/20

Specifications
(Boundary dimensions ...etc)

d(mm)76.200
D(mm)133.350
T(mm)33.338
B(mm)33.338
C(mm)26.195
r(min.)(mm)6.4
r1(min.)(mm)3.2
Basic load ratings : Cr(kN)193
Basic load ratings : C0r(kN)245
Fatigue load limit : Cu(kN)37.2
Limiting speeds(Grease lub.)(min-1)2700
Limiting speeds(Oil lub.)(min-1)3700
Load center spread : a(mm)29.2
Constant :e()0.40
Axial load factors : Y1()1.48
Axial load factors : Y0()0.82

Mounting dimensions

da(mm)97.0
db(mm)90.0
Da(mm)119.0
Db(mm)128.0
ra(max.)(mm)6.4
rb(max.)(mm)3.2

Refer.

(Refer.)Mass(kg) 1.867
JTEKT

2025/06/01