Koyo
FOR REFERENCE ONLY
  • Deep groove ball bearings
  • Extra-small, miniature ball bearings
  • Standard type
  • Shielded ZZ


Bearing No. WML4008 ZZ

Specification data (main dimensions, etc.)

d(mm)4
D(mm)8
B(mm)3
r(min.)(mm)0.08
Basic load ratings : Cr(kN)0.490
Basic load ratings : C0r(kN)0.14
Fatigue load limit : Cu(kN)0.004
factor : f014.6
Limiting speeds(Grease lub.)(min-1)61000
Limiting speeds(Oil lub.)(min-1)-

Mounting dimensions,weight (reference)

da(min.)(mm)4.8 mm
Da(max.)(mm)7.2 mm
ra(max.)(mm)0.08 mm
Mass(Refer.)(kg)0.4 kg
JTEKT

2026/07/05