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How to Fix the Tension Spring on a Miter Saw

Steven French

A miter saw is an indispensable tool for a number of home improvement projects. It is perfect for making precise cuts at a number of different angles for molding, trim and other woodworking. When the tension spring (or torsion spring) of a miter saw is damaged, the cutting head may not stay in its upright position, causing a safety hazard. Fixing the tension spring is simply a matter of finding the proper replacement part and replacing it, and you'll be back up and running in no time.

Without a functioning tension spring, a miter saw can be dangerous.
  1. Unplug the miter saw. This will ensure safety while carrying out the repair process.

  2. Hold the saw handle with one hand while you release the hold-down latch and remove the locking pins that attach the cutting head to the miter surface. Depending on the model of miter saw, there may be more than one pin.

  3. Lift up the cutting head and set it carefully on its side, being careful not to touch the saw blade.

  4. Use a flat screwdriver to pry one end of the tension spring loose, then pull it out of its casing. Place the new tension spring in place of the old spring, locking both ends into place.

  5. Lift the cutting head into place on the miter surface, and replace the locking pins. Test to make sure the spring tension is correct and that the cutting head lifts up properly before plugging in the saw.