DIY Mulifunctional Beltsander - Discsander Knife Sharpening

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yes it is a long Video but half way into i got more and more ideas.... and don't judge me on my knife sharpening skills ;)
The grinder is actully a polishing machine (rotation 900-2500)
It was importent for me that its possible to change the belts fast and easy.
One problem are the diffrent belts, they have allways a littlebit tolerance in length! That why i came up with spanning system and its also self tighten :)
The hole Video took way longer as I thought but I'm very happy with the final result.
I had a lot of fun to build that Beltsander and I hope you get inspired for your own projects :)
If you liked it, I would be happy about a thumb up or a sub.