Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Inch series
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Bearing No. 6581XR/35

Specifications
(Boundary dimensions ...etc)

d(mm)90.000
D(mm)161.925
T(mm)53.975
B(mm)55.100
C(mm)42.862
r(min.)(mm)3.0
r1(min.)(mm)3.2
Basic load ratings : Cr(kN)395
Basic load ratings : C0r(kN)471
Fatigue load limit : Cu(kN)61.4
Limiting speeds(Grease lub.)(min-1)2400
Limiting speeds(Oil lub.)(min-1)3200
Load center spread : a(mm)41.0
Constant :e()0.40
Axial load factors : Y1()1.50
Axial load factors : Y0()0.82

Mounting dimensions

da(mm)102.0
db(mm)98.0
Da(mm)141.0
Db(mm)154.0
ra(max.)(mm)3.0
rb(max.)(mm)3.2

Refer.

(Refer.)Mass(kg) 4.67
JTEKT

2025/06/01