Sometimes its possible to motorize these types of grinders...
We have a big ol' grinder (No.32 maybe? It's giant) rigged to a 1/2 hp farm utility motor. It had to be run through two sets of reduction chain and sprockets to get the speed low enough though. The motor dates back to the 50's, the grinder is older as well. It's served the family well for well over 30 years since first assembled. It's done two beefs, several porks and a number of deer every year. No one misses the hand crank.