Koyo
FOR REFERENCE ONLY
  • Angular contact ball bearings
  • Matched pair
  • Back-to-back
  • With machined cage


Bearing No. 7311BDB FY

Specification data (main dimensions, etc.)

d(mm)55
D(mm)120
B(mm)58
r(min.)(mm)2
r1(min.)(mm)1
Basic load ratings : Cr(kN)151
Basic load ratings : C0r(kN)104
Fatigue load limit : Cu(kN)6.80
factor : f0-
Limiting speeds(Grease lub.)(min-1)4000
Limiting speeds(Oil lub.)(min-1)5400
Load center spread : a(mm)103.7

Mounting dimensions,weight (reference)

da(min.)(mm)65 mm
Db(max.)(mm)114.5 mm
ra(max.)(mm)2 mm
rb(max.)(mm)1 mm
Mass(Refer.)(kg)2.90 kg
JTEKT

2026/07/19