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


Bearing No. 30205JR

Specification data (main 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 e0.37
Axial load factors : Y11.60
Axial load factors : Y00.88

Mounting dimensions,weight (reference)

da(min.)(mm)30.5 mm
db(max.)(mm)31 mm
Da(max.)(mm)46.5 mm
da(min.)(mm)44 mm
db(min.)(mm)48 mm
Sa(min.)(mm)2 mm
Sb(min.)(mm)3 mm
ra(max.)(mm)1 mm
rb(max.)(mm)1 mm
Mass(Refer.)(kg)0.156 kg
JTEKT

2026/07/04