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How is the Constant Force Spring mounted?

  • Slide bearings (drums) or ball bearings can be used for mounting
  • At least 1½ windings must remain on the drum when the spring is fully expanded
  • It is not necessary to attach the spring to the drum
  • The sufficient wrap angle prevents slipping
  • The ideal drum diameter is 15-20% larger than the relaxed inner diameter of the constant force spring