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Measure Relaxed Spring Plate Angle


  • After disconnecting the swing arm from the spring plate, measure the angle of the top edge so that it can be returned to the same position.
  • There are 40 splines on the inner end and 44 splines on the outer end.
  • If the spring plate is off by one spline it will change the angle shown by 8 deg 10 min.
  • This change is greater than the 5 deg resolution of the measuring instrument.
  • The instrument is a Craftsman Magnetic base Protractor - Surface Level
  • It is available at Sears for less than $5.
Last modified: Sat, 11 Nov 2000


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