Well, looks like I'll be going back to bread! I already go through 1 every 2 years or so just with normal grinding, no need to add additional stress to the unit...That picture brings back memories....
I blew the gear case out of Bride's KA mixer putting ice in it.... Now I use the heels of bread.... Near as I can tell, the ice froze into a "meat screw stopper" and twisted the gear case housing apart.... It was a phenolic gear case housing... the replacement was cast aluminum.... Now you know why they can put them on sale... fill them with cheap parts....
I'm glad I could learn from your mistake!