Grinder. A cone instead of a barrel. Have you ever seen anything like this?
I installed a cone on the grinder instead of a barrel, and all my belt adjustment problems became a thing of the past. Not a bad solution for homemade belts.
A few things from my workshop arsenal
Sputnik Grinder: https://clck.ru/33p9MW
Dino Grinder for Angle Grinder: https://clck.ru/35JqRT
Udachny Grinder: https://clck.ru/32dsxQ
Udachny Pipe Bender: https://clck.ru/34mUx8
Dino Pipe Bender: https://clck.ru/34mUxr
Sputnik Muffle Furnace: https://clck.ru/34mV2J
Potbelly Stove: https://clck.ru/34mV48
Sputnik Sandblaster: https://clck.ru/34mV5k
And a helper, which is essential
Organic SA: https://clck.ru/338Rad