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Have you seen the construction of this machine?
Drum Sander - Thickness Sander Making Video & PDF Dimensions
I updated my Drum Sander. This drum sander now has a motorized slide. No need to use your hands anymore to push and pull. Sanding any woods easly. You can download the gears template (PDF). Print it 100% scale. I used for print the chrome browser.
Making Video :
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PDF Download : Drum Sander Motorized Feed Mechanizm
With this simple knife sharpening tool, you can sharpen your knives to razor sharpness. It is very easy to make and only takes a few minutes.

When you watch this video, you can learn to make a center marking tool. The center finder is a useful tool for woodworking. You can mark a cylinder or square.