Sanding Saw




Introduction: Sanding Saw

For those of us who collect homemade sanding blocks or need to sand around corners and curves, may I present to you this homemade bow sander.

This bow sander is great for tight, curved places and works from both top and bottom.

Maybe your great grandchildren will look at yours someday and ask, “What was that thing for anyway?

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I would also apologise for my English as a non-native English speaker some terms are very difficult for me. Forward, Instructable!!

Step 1: Materials and Tools



    Step 2: Handle Saw Part 1 (A & B Pieces)

    Draw the contour of the handle saw on a piece of wood. I used Sycamore wood but you an use other type.

    I cut the straight zones with a Japanese Saw and the curved zones with a chisel, a file cut and and finally with a scraper.

    Step 3: Top of the Saw (wooden Rod)

    Since in this project I did not want to use glue, I though to join the pieces A and B with threads. For this I used a woodthreading in both sides of a wooden rod of beech wood (25x380mm or 1"x15")

    Mark the centre of the pieces (A and B) and drill it with a flat wood bit of 22mm in the A piece and 23mm in the B piece.

    Step 4: Wood Tapping

    Cut the wooden rod at a length of 15" or 380mm and before making the threads we cover it in linseed oil and wrap overnight with film in order to absorb the oil and make easier the threads. Apply also the linseed oil in the hole of the piece A.

    Then we make the threads with the Woodthreading:

    - 1 in piece A as per photograph.

    - 2 in both sides of the wooden rod.

    Step 5: Handle Saw Part 2

    For a smoother touch of our handle saw round the vertices. I use a spokeshave, a block plane, a gouge cut 3 straight and finally with a grid 280 sandpaper.

    For the inner part I use a Rasping Riffler File .

    Step 6: Wooden Nuts

    For the nuts I used oak wood.

    Use a compas to draw the nuts on the wood making a circle and marking a hexagon with it. Drill the centre with a bit of 22mm and make the thread. Then cut the sides of the hexagon with a saw.

    Since we need 2 nuts, we divide the piece into 2 equal nuts with the help of a gauge and a saw.

    Step 7: Assembly of the Sanding Belt

    Once all the pieces created, we have to locate the sanding belt.

    I leave a drawing with the place where I made the holes but if you have changed the sizes you will have to adapt to yours.

    Step 8: Leather Belt

    So that the paper sanding does not break

    For avoid breaks in the paper sanding while sanding, I created a leather belt. I sewed 2 little rods at both ends but if you prefer you can use contact glue or similar.

    Step 9: Wooden Finish and Final Assembly

    Finally, I apply linseed oil to all pieces and assemble what I have called "SAW SANDIG"



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      31 Discussions

      Love this!! Looks so much nicer to hold than the flat sanders I've been using. :)

      1 reply

      Nice execution. I really like it.

      If you can source it locally, Cloth backed sandpaper is available in rolls and widths that would mean you would not need the the leather strip. I think cloth backed sandpaper would be easier to tension too. Less moving parts.

      Using cloth backed sandpaper you could also simplify the way the paper is held. A simple handsaw cut at an angle would probably be enough.

      1 reply

      Yes, you're right, I've also proved it with cloth backed sandpaper and it's not necessary to use the leather strip. Good observation!!!

      This is a brilliant piece of work! Both clever, and beautifully designed. You got a great result, well done!

      1 reply


      Don't you think you should disclaim that you're using Amazon Affiliate links? Just for the sake of honesty. I really wish more people here included a disclaimer, which you are supposed to do...

      superb design & top class craftsmanship. Plan to make one soon

      1 reply

      Wow. This is such a clever idea. It's going to make a sanding work much more comfortable!

      1 reply

      What an inventive and great idea! I see innovative things like this and wack my head, wishing I'd thought of it. Good job!

      1 reply

      I'm happy that you like the idea, thank you very much for your words!!