Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Inch series
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Bearing No. 25880R/21

Specifications
(Boundary dimensions ...etc)

d(mm)36.487
D(mm)73.025
T(mm)23.812
B(mm)24.608
C(mm)19.050
r(min.)(mm)1.6
r1(min.)(mm)0.8
Basic load ratings : Cr(kN)90.1
Basic load ratings : C0r(kN)87.3
Fatigue load limit : Cu(kN)13.1
Limiting speeds(Grease lub.)(min-1)5600
Limiting speeds(Oil lub.)(min-1)7400
Load center spread : a(mm)15.8
Constant :e()0.29
Axial load factors : Y1()2.07
Axial load factors : Y0()1.14

Mounting dimensions

da(mm)44.0
db(mm)42.0
Da(mm)65.0
Db(mm)68.0
ra(max.)(mm)1.6
rb(max.)(mm)0.8

Refer.

(Refer.)Mass(kg) 0.459
JTEKT

2025/06/01