Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series
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Bearing No. 30244JR

Specifications
(Boundary dimensions ...etc)

d(mm)220
D(mm)400
T(mm)72
B(mm)65
C(mm)54
r(min.)(mm)5
r1(min.)(mm)4
Basic load ratings : Cr(kN)1260
Basic load ratings : C0r(kN)1440
Fatigue load limit : Cu(kN)160
Limiting speeds(Grease lub.)(min-1)830
Limiting speeds(Oil lub.)(min-1)1100
Load center spread : a(mm)76.5
Constant e()0.44
Axial load factors : Y1()1.43
Axial load factors : Y0()0.79

Mounting dimensions

da(min.)(mm)242
db(max.)(mm)263
Da(max.)(mm)382
Da(min.)(mm)344
Db(min.)(mm)371
Sa(min.)(mm)14
Sb(min.)(mm)17
ra(max.)(mm)4
rb(max.)(mm)3

Refer.

(Refer.)Mass(kg) 35.9
JTEKT

2025/06/01