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


Bearing No. 27880/20

Specification data (main dimensions, etc.)

d(mm)38.100
D(mm)80.035
T(mm)24.608
B(mm)23.698
C(mm)18.512
r(min.)(mm)0.8
r1(min.)(mm)1.6
Basic load ratings : Cr(kN)91.6
Basic load ratings : C0r(kN)91.6
Fatigue load limit : Cu(kN)13.3
Limiting speeds(Grease lub.)(min-1)5200
Limiting speeds(Oil lub.)(min-1)6900
Load center spread : a(mm)22.2
Constant :e0.56
Axial load factors : Y11.07
Axial load factors : Y00.59

Mounting dimensions,weight (reference)

da(mm)48.0 mm
db(mm)47.0 mm
Da(mm)68.0 mm
Db(mm)75.0 mm
ra(max.)(mm)0.8 mm
rb(max.)(mm)1.6 mm
Mass(Refer.)(kg)0.586 kg
JTEKT

2026/07/01