Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series
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Bearing No. 33121JR

Specifications
(Boundary dimensions ...etc)

d(mm)105
D(mm)175
T(mm)56
B(mm)56
C(mm)44
r(min.)(mm)2.5
r1(min.)(mm)2
Basic load ratings : Cr(kN)453
Basic load ratings : C0r(kN)607
Fatigue load limit : Cu(kN)76.0
Limiting speeds(Grease lub.)(min-1)2100
Limiting speeds(Oil lub.)(min-1)2800
Load center spread : a(mm)43.2
Constant e()0.40
Axial load factors : Y1()1.48
Axial load factors : Y0()0.82

Mounting dimensions

da(min.)(mm)117
db(max.)(mm)116
Da(max.)(mm)165
Da(min.)(mm)150
Db(min.)(mm)169
Sa(min.)(mm)9
Sb(min.)(mm)12
ra(max.)(mm)2
rb(max.)(mm)2

Refer.

(Refer.)Mass(kg) 5.33
JTEKT

2025/06/01