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


Bearing No. A4059/138

Specification data (main dimensions, etc.)

d(mm)14.989
D(mm)34.988
T(mm)10.998
B(mm)10.988
C(mm)8.730
r(min.)(mm)0.8
r1(min.)(mm)1.2
Basic load ratings : Cr(kN)15.7
Basic load ratings : C0r(kN)11.9
Fatigue load limit : Cu(kN)1.55
Limiting speeds(Grease lub.)(min-1)12000
Limiting speeds(Oil lub.)(min-1)17000
Load center spread : a(mm)8.3
Constant :e0.45
Axial load factors : Y11.33
Axial load factors : Y00.73

Mounting dimensions,weight (reference)

da(mm)19.5 mm
db(mm)19.0 mm
Da(mm)29.0 mm
Db(mm)32.0 mm
ra(max.)(mm)0.8 mm
rb(max.)(mm)1.2 mm
Mass(Refer.)(kg)0.051 kg
JTEKT

2026/07/01