Koyo
FOR REFERENCE ONLY
  • Cylindrical roller bearings
  • Single-row
  • NU
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Bearing No. N321

Specifications
(Boundary dimensions ...etc)

d(mm)105
D(mm)225
B(mm)49
r(min.)(mm)3
r1(min.)(mm)3
Fw(mm)
Ew(mm)-
Basic load ratings : Cr(kN)451
Basic load ratings : C0r(kN)417
Fatigue load limit : Cu(kN)57.2
Limiting speeds(Grease lub.)(min-1)2600
Limiting speeds(Oil lub.)(min-1)3500
sd1(mm)-
B1(mm)-
B2(mm)-

Mounting dimensions

da(min.)(mm)-
db(min.)(mm)
db(max.)(mm)
dc(min.)(mm)-
dd(min.)(mm)-
Da(max.)(mm)212
Db(max.)(mm)-
Db(min.)(mm)-
ra(max.)(mm)2.5
rb(max.)(mm)2.5

Refer.

(Refer.)Mass(kg)
JTEKT

2025/07/11