Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series
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Bearing No. 32311JR

Specifications
(Boundary dimensions ...etc)

d(mm)55
D(mm)120
T(mm)45.5
B(mm)43
C(mm)35
r(min.)(mm)2.5
r1(min.)(mm)2
Basic load ratings : Cr(kN)250
Basic load ratings : C0r(kN)250
Fatigue load limit : Cu(kN)39.1
Limiting speeds(Grease lub.)(min-1)3400
Limiting speeds(Oil lub.)(min-1)4500
Load center spread : a(mm)32.4
Constant e()0.35
Axial load factors : Y1()1.74
Axial load factors : Y0()0.96

Mounting dimensions

da(min.)(mm)67
db(max.)(mm)68
Da(max.)(mm)108
Da(min.)(mm)99
Db(min.)(mm)111
Sa(min.)(mm)4
Sb(min.)(mm)10.5
ra(max.)(mm)2
rb(max.)(mm)2

Refer.

(Refer.)Mass(kg) 2.38
JTEKT

2025/06/01