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


Bearing No. W688 ZZ

Specification data (main dimensions, etc.)

d(mm)8
D(mm)16
B(mm)5
r(min.)(mm)0.2
Basic load ratings : Cr(kN)1.55
Basic load ratings : C0r(kN)0.59
Fatigue load limit : Cu(kN)0.020
factor : f014.0
Limiting speeds(Grease lub.)(min-1)42000
Limiting speeds(Oil lub.)(min-1)-

Mounting dimensions,weight (reference)

da(min.)(mm)9.6 mm
Da(max.)(mm)14.4 mm
ra(max.)(mm)0.2 mm
Mass(Refer.)(kg)3.2 kg
JTEKT

2026/07/01