Re: Meat MixerI bought one on e-bay a while back. The have allot of them on sale there. Mine holds 25 lbs. It is no trouble to turn by hand when filled to capacity. Sometimes, it is good to turn it backwards a spin or two. I would not motorize the small 20 to 25 lb unit. They also make a 80 lb model which has gear reductions on it for ease of turning.
I have used a large motorized one that holds either 100 or 150 lbs., I don't remember which, and I would guess that it was turning about 50 to 60 revolutions per minute.