I would guess that the belt likely would rip under the force of the serpentine belt tensioner, I need to use a breaker bar to remove my gm belt, where as every available belt sander comes with a knob, spring or low pressure pneumatic ram for that purpose, good idea if you could weaken the spring coil firstWhy couldn’t you use an automotive style belt tensioner...to, well, tension the sanding belt?
Any that I’m used to seeing are spring loaded and require one tool, usually a ratchet, to release the tension so the belt can be changed
And unless the actual bearing is bad you could steal a used one from a wrecking yard, likely for next to nothing.
Hello Janger, if I ever get around to doing this I will let you know how it works. I have never tried to descale with vinegar before.I'm using pickling vinegar which is 7%. I'd like to try 10%. Hruul if you give it a go I'd like to hear your impressions.