Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series
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Bearing No. 30306JR

Specifications
(Boundary dimensions ...etc)

d(mm)30
D(mm)72
T(mm)20.75
B(mm)19
C(mm)16
r(min.)(mm)1.5
r1(min.)(mm)1.5
Basic load ratings : Cr(kN)74.4
Basic load ratings : C0r(kN)60.1
Fatigue load limit : Cu(kN)9.00
Limiting speeds(Grease lub.)(min-1)5800
Limiting speeds(Oil lub.)(min-1)7700
Load center spread : a(mm)15.7
Constant e()0.31
Axial load factors : Y1()1.90
Axial load factors : Y0()1.05

Mounting dimensions

da(min.)(mm)38.5
db(max.)(mm)40
Da(max.)(mm)63.5
Da(min.)(mm)62
Db(min.)(mm)66
Sa(min.)(mm)3
Sb(min.)(mm)4.5
ra(max.)(mm)1.5
rb(max.)(mm)1.5

Refer.

(Refer.)Mass(kg) 0.411
JTEKT

2025/06/01