Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series
>

Bearing No. 30308DJR

Specifications
(Boundary dimensions ...etc)

d(mm)40
D(mm)90
T(mm)25.25
B(mm)23
C(mm)17
r(min.)(mm)2
r1(min.)(mm)1.5
Basic load ratings : Cr(kN)100
Basic load ratings : C0r(kN)90.2
Fatigue load limit : Cu(kN)13.1
Limiting speeds(Grease lub.)(min-1)3800
Limiting speeds(Oil lub.)(min-1)5300
Load center spread : a(mm)29.9
Constant e()0.83
Axial load factors : Y1()0.73
Axial load factors : Y0()0.40

Mounting dimensions

da(min.)(mm)50
db(max.)(mm)51
Da(max.)(mm)80
Da(min.)(mm)71
Db(min.)(mm)86.5
Sa(min.)(mm)3
Sb(min.)(mm)8
ra(max.)(mm)2
rb(max.)(mm)1.5

Refer.

(Refer.)Mass(kg) 0.757
JTEKT

2025/06/08