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


Bearing No. NH256

Specification data (main dimensions, etc.)

d(mm)280
D(mm)500
B(mm)80
r(min.)(mm)5
r1(min.)(mm)5
Fw(mm)340
Ew(mm)-
Basic load ratings : Cr(kN)1430
Basic load ratings : C0r(kN)1680
Fatigue load limit : Cu(kN)179
Limiting speeds(Grease lub.)(min-1)1000
Limiting speeds(Oil lub.)(min-1)1200
sd1(mm)360
B1(mm)18
B2(mm)33

Mounting dimensions,weight (reference)

da(min.)(mm)300 mm
db(min.)(mm)- mm
db(max.)(mm)- mm
dc(min.)(mm)- mm
dd(min.)(mm)- mm
Da(max.)(mm)480 mm
Db(max.)(mm)- mm
Db(min.)(mm)- mm
ra(max.)(mm)4 mm
rb(max.)(mm)4 mm
Mass(Refer.)(kg)81.55 kg
JTEKT

2026/07/04