Homemade Bench Grinder Sanding Disc

Written by steve smith
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Homemade Bench Grinder Sanding Disc
Sandpaper discs use abrasives and resins. (sandpapier image by Thomas Aumann from Fotolia.com)

A bench grinder uses a sanding belt to grind wood or metal objects. Some have the ability to accept a disc attachment that fits on the side of the larger belt gear wheels. This assembly often has a flat guide that allows a woodworker to grind objects at more accurate 90-degree angles. These discs are made with resin and abrasives and may be built at home. They will only fit bench grinders designed to accept grinding discs, however.

Skill level:
Moderate

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Things you need

  • Compass
  • Paper
  • Scissors
  • Resin or adhesive
  • Sand or metal filings

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Instructions

  1. 1

    Measure the width of the grinding belt's disc attachment with a compass. Find the radius by placing one point in the dead centre bolt, and extending the other compass point (the arm with the pencil) to the edge of the disc plate attachment area.

  2. 2

    Set the compass point on a piece of paper (keeping your radius measurement) and draw out the circle by moving the compass pencil around the compass point.

  3. 3

    Cut out the circle using a pair of sharp, accurate workshop scissors.

  4. 4

    Apply a resin adhesive compound to the surface of the paper. Coat the entire surface with a generous amount of resin using a paint brush or plastic scraper.

  5. 5

    Sprinkle an abrasive like sand or metal filings to the resin, covering the entire area with an even amount of abrasive material. Let dry for several hours until the resin cures.

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