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


Bearing No. 3386/20

Specification data (main dimensions, etc.)

d(mm)39.688
D(mm)80.167
T(mm)29.370
B(mm)30.391
C(mm)23.812
r(min.)(mm)0.8
r1(min.)(mm)3.2
Basic load ratings : Cr(kN)114
Basic load ratings : C0r(kN)106
Fatigue load limit : Cu(kN)16.2
Limiting speeds(Grease lub.)(min-1)5000
Limiting speeds(Oil lub.)(min-1)6700
Load center spread : a(mm)18.7
Constant :e0.27
Axial load factors : Y12.20
Axial load factors : Y01.21

Mounting dimensions,weight (reference)

da(mm)46.5 mm
db(mm)45.5 mm
Da(mm)70.0 mm
Db(mm)75.0 mm
ra(max.)(mm)0.8 mm
rb(max.)(mm)3.2 mm
Mass(Refer.)(kg)0.659 kg
JTEKT

2026/07/19