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


Bearing No. 24780R/20

Specification data (main dimensions, etc.)

d(mm)41.275
D(mm)76.200
T(mm)22.225
B(mm)23.020
C(mm)17.462
r(min.)(mm)3.6
r1(min.)(mm)0.8
Basic load ratings : Cr(kN)82.9
Basic load ratings : C0r(kN)83.3
Fatigue load limit : Cu(kN)12.3
Limiting speeds(Grease lub.)(min-1)5200
Limiting speeds(Oil lub.)(min-1)6900
Load center spread : a(mm)17.4
Constant :e0.39
Axial load factors : Y11.53
Axial load factors : Y00.84

Mounting dimensions,weight (reference)

da(mm)54.0 mm
db(mm)47.0 mm
Da(mm)68.0 mm
Db(mm)72.0 mm
ra(max.)(mm)3.6 mm
rb(max.)(mm)0.8 mm
Mass(Refer.)(kg)0.423 kg
JTEKT

2026/08/06