•  
• Bearing Type
• current code
  W 638/4-2Z
• The inside diameter of
• d
  4
• Outer diameter
• D
  9
• Thickness
• B
  4
• Basic dynamic load rating
• Cr
  0.364
• Basic static load rating
• C₀
  0.114
• Fatigue load
• P_u
  0.005
• Reference speed
• Reference speed
  140000
• limit speed
• limit speed
  70000r/min
• Bearing Type
• Type
  Deep groove ball bearings

W 638/4-2ZBearings are suitable for gearboxes, instruments, motors, household appliances, internal combustion engines, transportation vehicles, agricultural machinery, construction machinery, construction machinery, roller skates, yoyos, etc.