•  
• Bearing Type
• Current code
  W 639
• The inside diameter of
• d
  9
• Outer diameter
• D
  30
• Thickness
• B
  10
• Basic dynamic load rating
• Cr
  4.36
• Basic static load rating
• C₀
  2.32
• Fatigue load
• P_u
  0.1
• Reference speed
• Reference speed
  60000
• Limit speed
• Limit speed
  36000r/min
• Type
• Type
  Deep groove ball bearings

W 639Bearings are suitable for gearboxes, instruments, motors, household appliances, internal combustion engines, transportation vehicles, agricultural machinery, construction machinery, construction machinery, roller skates, yoyos, etc.