Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series
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Bearing No. 30205JR

Specifications
(Boundary dimensions ...etc)

d(mm)25
D(mm)52
T(mm)16.25
B(mm)15
C(mm)13
r(min.)(mm)1
r1(min.)(mm)1
Basic load ratings : Cr(kN)39.3
Basic load ratings : C0r(kN)33.7
Fatigue load limit : Cu(kN)4.75
Limiting speeds(Grease lub.)(min-1)7800
Limiting speeds(Oil lub.)(min-1)10000
Load center spread : a(mm)12.9
Constant e()0.37
Axial load factors : Y1()1.60
Axial load factors : Y0()0.88

Mounting dimensions

da(min.)(mm)30.5
db(max.)(mm)31
Da(max.)(mm)46.5
Da(min.)(mm)44
Db(min.)(mm)48
Sa(min.)(mm)2
Sb(min.)(mm)3
ra(max.)(mm)1
rb(max.)(mm)1

Refer.

(Refer.)Mass(kg) 0.156
JTEKT

2025/05/18