Koyo
FOR REFERENCE ONLY
  • Deep groove ball bearings
  • Single-row
>

Bearing No. 6903NR

Specifications
(Boundary dimensions ...etc)

d(mm)17
D(mm)30
B(mm)7
r(min.)(mm)0.3
r1(min.)(mm)0.3
Basic load ratings : Cr(kN)5.75
Basic load ratings : C0r(kN)2.55
Fatigue load limit : Cu(kN)0.130
factor : f0()14.7
Limiting speeds(Grease lub.)(min-1)23000
Limiting speeds(Oil lub.)(min-1)28000
Dimensions of snap ring groove : D1(max.)(mm)
Dimensions of snap ring groove : a(max.)(mm)
Dimensions of snap ring groove : b(±0.05)(mm)
Dimensions of snap ring groove : r0(max.)(mm)
Dimensions of locating snap ring : D2(min.)(mm)32.8
Dimensions of locating snap ring : f(±0.05)(mm)0.8

Mounting dimensions

da(min.)(mm)19
Da(max.)(mm)28
Dx(min.)(mm)33.5
Cy(max.)(mm)1.9
ra(max.)(mm)0.3
rb(max.)(mm)0.3

Refer.

(Refer.)Mass(kg) 0.018
JTEKT

2025/05/10