Koyo
FOR REFERENCE ONLY
  • Cylindrical roller bearings
  • Single-row
  • N
>

Bearing No. N304

Specifications
(Boundary dimensions ...etc)

d(mm)20
D(mm)52
B(mm)15
r(min.)(mm)1.1
r1(min.)(mm)0.6
Fw(mm)-
Ew(mm)44.5
Basic load ratings : Cr(kN)28.9
Basic load ratings : C0r(kN)19.2
Fatigue load limit : Cu(kN)2.50
Limiting speeds(Grease lub.)(min-1)12000
Limiting speeds(Oil lub.)(min-1)16000
sd1(mm)-
B1(mm)-
B2(mm)-

Mounting dimensions

da(min.)(mm)26.5
db(min.)(mm)-
db(max.)(mm)-
dc(min.)(mm)-
dd(min.)(mm)-
Da(max.)(mm)-
Db(max.)(mm)48
Db(min.)(mm)45.5
ra(max.)(mm)1
rb(max.)(mm)0.6

Refer.

(Refer.)Mass(kg) 0.144
JTEKT

2025/06/16