Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Inch series
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Bearing No. 34307/478

Specifications
(Boundary dimensions ...etc)

d(mm)77.788
D(mm)121.442
T(mm)24.608
B(mm)23.012
C(mm)17.462
r(min.)(mm)6.4
r1(min.)(mm)2.0
Basic load ratings : Cr(kN)113
Basic load ratings : C0r(kN)127
Fatigue load limit : Cu(kN)19.4
Limiting speeds(Grease lub.)(min-1)3000
Limiting speeds(Oil lub.)(min-1)4000
Load center spread : a(mm)26.8
Constant :e()0.45
Axial load factors : Y1()1.33
Axial load factors : Y0()0.73

Mounting dimensions

da(mm)96.0
db(mm)84.0
Da(mm)110.0
Db(mm)116.0
ra(max.)(mm)6.4
rb(max.)(mm)2.0

Refer.

(Refer.)Mass(kg) 0.884
JTEKT

2025/06/01