Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Inch series
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Bearing No. 1280/20

Specifications
(Boundary dimensions ...etc)

d(mm)22.225
D(mm)57.150
T(mm)22.225
B(mm)22.225
C(mm)17.462
r(min.)(mm)0.8
r1(min.)(mm)1.6
Basic load ratings : Cr(kN)65.8
Basic load ratings : C0r(kN)55.7
Fatigue load limit : Cu(kN)8.05
Limiting speeds(Grease lub.)(min-1)7600
Limiting speeds(Oil lub.)(min-1)10000
Load center spread : a(mm)15.3
Constant :e()0.35
Axial load factors : Y1()1.73
Axial load factors : Y0()0.95

Mounting dimensions

da(mm)29.5
db(mm)29.0
Da(mm)49.0
Db(mm)52.0
ra(max.)(mm)0.8
rb(max.)(mm)1.6

Refer.

(Refer.)Mass(kg) 0.294
JTEKT

2025/05/10