How To Make A Sanding Block

By Robert Robillard on Workshop tips

Custom Sanding Block Using Standard 3″ x 21″ Sanding Belts

A sanding block is used to provide a solid and often flat suppoCarpentery tiprt for sandpaper. This article will show you how to make a sanding block using a 3″ x 21″ belt sander sand paper belt.

How To Make A Sanding Block

Typically I use a scrap block of wood in a pinch for small sanding operations, but when I know I’m going to do a lot of hand sanding I use my custom made block that is designed to use a 3″ x 21″ sanding belt.  These are the belts that are used on belt sanders and come in many grits.

Fancier sanding blocks use clips, teeth or clamps to hold sand paper in place.  these brands typically  hold a quarter or half sheet of sandpaper.

My method of using a 3″ x 21″ sanding belt instead of the traditional 9 x 11 sand paper sheets allows me to attach my belt and sand away with out having to change or adjust anything.   I can flip it over or rotate the sanding belt if I need fresh grit.

The best advantage of using a sanding belt is longevity, they last ten times longer, don’t rip or tear carpentry tipon sharp edges, and are able to be cleaned and reused.

How To Make A Sanding Belt Block:

  1. Measure the inside of a 3″ x 21″ sanding belt,
  2. Cut  a 3″ wide piece of poplar to that length,
  3. Use a miter saw and clip both sides or both ends of the board
  4. Sand the 45 degree clips to a round and smooth end
  5. Test fit a 3″ x 21″ sanding belt ~ sand away
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About the author

Robert Robillard

Carpenter / Remodeler / Editor

Rob Robillard is “The Concord Carpenter” Rob is a builder, general contractor, carpenter, woodworker, and editor of Concord Carpenter and ToolBoxBuzz As a General Contractor and carpenter, Rob owns and operates Concord Carpenter LLC. A full-service remodeling and construction company. Rob is a recognized leader in home building best practices and a source for how-to information for building professionals. On this website, Rob covers all aspects of home construction, building science, home improvement, woodworking, remodeling, and some of the best product and tool reviews. Rob is in charge of our Tool and Product Review series - Concord Carpenter Videos where we post all of our tool reviews and video tutorials. Rob approaches remodeling and building construction with a pragmatic and problem-solving approach. He enjoys using his knowledge and experience to help and educate building professionals as well as DIYers on best practices in the construction and remodeling industry. He's a strong advocate for "raising the bar" in the construction trades and promoting the trades to youth. #BeAMentor #Green2Great Craftsmanship, quality, and pride guide his journey on this channel The Concord Carpenter's motto: "Well done is better than well said!" : Read more about Rob

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