Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Inch series
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Bearing No. LM12749/11

Specifications
(Boundary dimensions ...etc)

d(mm)21.987
D(mm)45.974
T(mm)15.494
B(mm)16.637
C(mm)12.065
r(min.)(mm)1.2
r1(min.)(mm)1.2
Basic load ratings : Cr(kN)37.5
Basic load ratings : C0r(kN)34.6
Fatigue load limit : Cu(kN)4.85
Limiting speeds(Grease lub.)(min-1)8900
Limiting speeds(Oil lub.)(min-1)12000
Load center spread : a(mm)10.0
Constant :e()0.31
Axial load factors : Y1()1.96
Axial load factors : Y0()1.08

Mounting dimensions

da(mm)27.5
db(mm)26.0
Da(mm)40.0
Db(mm)42.5
ra(max.)(mm)1.2
rb(max.)(mm)1.2

Refer.

(Refer.)Mass(kg) 0.121
JTEKT

2025/06/14