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


Bearing No. 3198/20

Specification data (main dimensions, etc.)

d(mm)28.575
D(mm)72.626
T(mm)30.162
B(mm)29.997
C(mm)23.812
r(min.)(mm)1.2
r1(min.)(mm)3.2
Basic load ratings : Cr(kN)98.6
Basic load ratings : C0r(kN)89.3
Fatigue load limit : Cu(kN)13.3
Limiting speeds(Grease lub.)(min-1)5800
Limiting speeds(Oil lub.)(min-1)7700
Load center spread : a(mm)20.3
Constant :e0.33
Axial load factors : Y11.80
Axial load factors : Y00.99

Mounting dimensions,weight (reference)

da(mm)39.0 mm
db(mm)37.0 mm
Da(mm)61.0 mm
Db(mm)67.0 mm
ra(max.)(mm)1.2 mm
rb(max.)(mm)3.2 mm
Mass(Refer.)(kg)0.632 kg
JTEKT

2026/06/30