Quite a graphic thread here...
I'm with Joedoh. I use a Metabo 4.5" paddle grinder, with the quick change nut. E-z disc changes. It runs smooth, and is well balanced. WORTH EVERY PENNY!
https://www.amazon.com/Metabo-WP9-11...6PF37WQYPWD3MP
I've used lots of cut off wheels, and NEVER had one explode. Use them with respect, don't let them bind. And, use a quality one. I use the Metabo slicer, and ceramic flap discs from Lehigh Valley abbrasives.
https://www.lehighvalleyabrasives.co...0-met655997000
https://www.lehighvalleyabrasives.co...0cp-fd4-5-40cf