Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Inch series
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Bearing No. 749R/742

Specifications
(Boundary dimensions ...etc)

d(mm)85.026
D(mm)150.089
T(mm)44.450
B(mm)46.672
C(mm)36.512
r(min.)(mm)3.6
r1(min.)(mm)3.2
Basic load ratings : Cr(kN)330
Basic load ratings : C0r(kN)368
Fatigue load limit : Cu(kN)50.1
Limiting speeds(Grease lub.)(min-1)2500
Limiting speeds(Oil lub.)(min-1)3400
Load center spread : a(mm)32.4
Constant :e()0.33
Axial load factors : Y1()1.84
Axial load factors : Y0()1.01

Mounting dimensions

da(mm)101.0
db(mm)95.0
Da(mm)134.0
Db(mm)142.0
ra(max.)(mm)3.6
rb(max.)(mm)3.2

Refer.

(Refer.)Mass(kg) 3.18
JTEKT

2025/06/01