Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series
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Bearing No. 30208JR

Specifications
(Boundary dimensions ...etc)

d(mm)40
D(mm)80
T(mm)19.75
B(mm)18
C(mm)16
r(min.)(mm)1.5
r1(min.)(mm)1.5
Basic load ratings : Cr(kN)78.4
Basic load ratings : C0r(kN)69.2
Fatigue load limit : Cu(kN)10.3
Limiting speeds(Grease lub.)(min-1)5000
Limiting speeds(Oil lub.)(min-1)6700
Load center spread : a(mm)17.0
Constant e()0.37
Axial load factors : Y1()1.60
Axial load factors : Y0()0.88

Mounting dimensions

da(min.)(mm)48.5
db(max.)(mm)49
Da(max.)(mm)71.5
Da(min.)(mm)69
Db(min.)(mm)75
Sa(min.)(mm)3
Sb(min.)(mm)3.5
ra(max.)(mm)1.5
rb(max.)(mm)1.5

Refer.

(Refer.)Mass(kg) 0.434
JTEKT

2025/05/23