I have an industrial duty pedastal grinder that uses 12 inch pressure sensitive adhesive (PSA) discs. Historically, it's a real task unpeeling the used disc to apply a new one. I got mad this morning and took the oxy/fuel rosebud to the surface, for just 5 seconds, whilst the machine was spinning, but turned off. The disc popped off in one piece, something that's never happened before. To remove the old rubbery glue, I turn the machine on for a second, then cut the power and use the backside of a sharp wood chisel and spin the glue off toward the center. To seat the new disc on tight, I bought a wooden wallpaper seam roller and apply pressure while it's spinning. This probably sounds silly, but I've spent 20 minutes each dozens of times fighting the used disc off when it's cold.

A heat gun is how most folk do it but if you're careful a rosebud aught to do the trick. A sort of sharp piece of wood will remove the adhesive while the platten is warm too.

Frosty the Lucky.

When I saw PSA, I thought Public Service Announcment, not, Pressure Sensitive Adhesive. :blink:

Good tip Mike, thanks.

I hate fighting those suckers.... I have tried heat guns and paint stripper to get rid of the glue... mine is a 16" and it seems like every time I change it I invest an hour....

I'll defiantly try your method

Ive always just used an old worn out screwdriver and with the machine running I take a rest( steady my hand ) and use the screwdriver to face off the disc.
Sort of like using a wood lathe I guess ( although ive never operated a wood lathe )

Mike Tanner

I don't seem to have a problem peeling the disc off platter. I fold the disc back pretty much on itself and pull straight down. That leaves some adhesive on the platter, which comes off easily with mineral spirits on a rag while the machine is spinning.

Maybe it has to do with the quality of the disc itself. At Jelly Belly we had a 16", or 20" disc sander. We ended up using the 3M Blue Grit discs. Yes they were expensive, but they really lasted, and peeled off OK. Only had to clean the disc after several changes had been done. You could usually just start on one edge, and start pulling right back on itself. I was taking the center 10" and cutting them out for a friend who had a 10" sander. The guys in the shop rarely used the centers up before pulling the disc.