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


Bearing No. 2689/31

Specification data (main dimensions, etc.)

d(mm)28.575
D(mm)66.421
T(mm)23.812
B(mm)25.433
C(mm)19.050
r(min.)(mm)1.2
r1(min.)(mm)1.2
Basic load ratings : Cr(kN)83.8
Basic load ratings : C0r(kN)75.2
Fatigue load limit : Cu(kN)11.2
Limiting speeds(Grease lub.)(min-1)6500
Limiting speeds(Oil lub.)(min-1)8700
Load center spread : a(mm)13.9
Constant :e0.25
Axial load factors : Y12.36
Axial load factors : Y01.30

Mounting dimensions,weight (reference)

da(mm)36.0 mm
db(mm)34.0 mm
Da(mm)58.0 mm
Db(mm)60.0 mm
ra(max.)(mm)1.2 mm
rb(max.)(mm)1.2 mm
Mass(Refer.)(kg)0.414 kg
JTEKT

2026/07/05