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


Bearing No. 30303JR

Specification data (main dimensions, etc.)

d(mm)17
D(mm)47
T(mm)15.25
B(mm)14
C(mm)12
r(min.)(mm)1
r1(min.)(mm)1
Basic load ratings : Cr(kN)34.2
Basic load ratings : C0r(kN)24.5
Fatigue load limit : Cu(kN)3.45
Limiting speeds(Grease lub.)(min-1)9200
Limiting speeds(Oil lub.)(min-1)12000
Load center spread : a(mm)11.0
Constant e0.29
Axial load factors : Y12.11
Axial load factors : Y01.16

Mounting dimensions,weight (reference)

da(min.)(mm)22.5 mm
db(max.)(mm)25 mm
Da(max.)(mm)41.5 mm
da(min.)(mm)40 mm
db(min.)(mm)42 mm
Sa(min.)(mm)2 mm
Sb(min.)(mm)3 mm
ra(max.)(mm)1 mm
rb(max.)(mm)1 mm
Mass(Refer.)(kg)0.133 kg
JTEKT

2026/07/07