This is a rotary sander for sanding bowls on a lathe, you can buy these in a store but they can be very expensive, so this is an economic version to make at home.
Equipment:
Wood lathe
Lathe chuck (or some other way to hold the timber)
Drill
Drill bits
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| Materials |
Materials:
1 - Metal or wood bar (140 x 25mm)
1 - Block of timber (60 x 60 x 35mm)
1 - Piece of dense foam (60 x 60)
1 - Bolt (40 x 8mm)
1 - Nut to fit bolt
4 - Washers to fit bolt
2 - ABEC bearings
Loop Velcro
Contact glue
Mount the timber in the lathe chuck (or other holding method); turn to a round shape 50mm in diameter. Drill an 8mm hole in the centre of the piece; this will be to fit the bolt.
Turn a tapped hole starting 23mm in diameter in the end of the timber that and tappers down in to the 8mm hole. The tapper is so the outer ring of the bearing will be pressed against the timber making it unable to move, while the inside ring will spin freely. Test the fit of the bearing.
3.
Turn the piece so the opposite end is ready to be turned. Turn a hole that is about 20mm deep and 23mm in diameter. Now tapper the end of the 23mm hole down to the 8mm hole. Test the fit of the bearing and the bolt. The bolt needs to be far enough thought to fit the bolt and handle.
4.
Drill a 9mm hole through one end of the handle, for my handle I used a piece of steel bar with three sides. File all of the rough edges smooth.
5.
After parts are ready to assemble they need to be assembled, the parts are assembled by threading the bolt through one washer and on to the bearing, this is put through the timber block in the deepest hole, the second bearing and another washer go on the other side of the timber block, now the handle is threaded on, now two washers and the nut tighten the lot together.
6.
Read and understand the instructions and safety advice on your contact glue before using. Spread an even layer of contact glue on the face of the timber block and on the foam layer press together, leave until dry. Depending on the brand of glue this may vary.
7.
Spread an even layer of contact glue to the other side of the foam and the back of the back of the Velcro press together until dry.
8.
Once dry you can add a chosen grit of paper and try it out on a bowl.
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