Koyo
FOR REFERENCE ONLY
  • Cylindrical roller bearings
  • Single-row
  • NH


Bearing No. NH2311

Specification data (main dimensions, etc.)

d(mm)55
D(mm)120
B(mm)43
r(min.)(mm)2
r1(min.)(mm)2
Fw(mm)70.5
Ew(mm)-
Basic load ratings : Cr(kN)185
Basic load ratings : C0r(kN)162
Fatigue load limit : Cu(kN)24.6
Limiting speeds(Grease lub.)(min-1)4500
Limiting speeds(Oil lub.)(min-1)6800
sd1(mm)77.2
B1(mm)9
B2(mm)18.5

Mounting dimensions,weight (reference)

da(min.)(mm)64 mm
db(min.)(mm)- mm
db(max.)(mm)- mm
dc(min.)(mm)- mm
dd(min.)(mm)- mm
Da(max.)(mm)111 mm
Db(max.)(mm)- mm
Db(min.)(mm)- mm
ra(max.)(mm)2 mm
rb(max.)(mm)2 mm
Mass(Refer.)(kg)2.352 kg
JTEKT

2026/08/14