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


Bearing No. 39580/20

Specification data (main dimensions, etc.)

d(mm)57.150
D(mm)112.712
T(mm)30.162
B(mm)30.162
C(mm)23.812
r(min.)(mm)3.6
r1(min.)(mm)3.2
Basic load ratings : Cr(kN)184
Basic load ratings : C0r(kN)207
Fatigue load limit : Cu(kN)32.1
Limiting speeds(Grease lub.)(min-1)3300
Limiting speeds(Oil lub.)(min-1)4500
Load center spread : a(mm)23.3
Constant :e0.34
Axial load factors : Y11.77
Axial load factors : Y00.97

Mounting dimensions,weight (reference)

da(mm)72.0 mm
db(mm)66.0 mm
Da(mm)101.0 mm
Db(mm)107.0 mm
ra(max.)(mm)3.6 mm
rb(max.)(mm)3.2 mm
Mass(Refer.)(kg)1.405 kg
JTEKT

2026/07/01