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


Bearing No. M349549/10

Specification data (main dimensions, etc.)

d(mm)257.175
D(mm)342.900
T(mm)57.150
B(mm)57.150
C(mm)44.450
r(min.)(mm)6.4
r1(min.)(mm)3.2
Basic load ratings : Cr(kN)764
Basic load ratings : C0r(kN)1280
Fatigue load limit : Cu(kN)135
Limiting speeds(Grease lub.)(min-1)870
Limiting speeds(Oil lub.)(min-1)1200
Load center spread : a(mm)60.1
Constant :e0.35
Axial load factors : Y11.73
Axial load factors : Y00.95

Mounting dimensions,weight (reference)

da(mm)276.0 mm
db(mm)276.0 mm
Da(mm)320.0 mm
Db(mm)330.0 mm
ra(max.)(mm)6.4 mm
rb(max.)(mm)3.2 mm
Mass(Refer.)(kg)13.26 kg
JTEKT

2026/07/05