Using Extraction Levels To Rate Grinders — Scott Rao
There are meat grinders made entirely of stainless steel that weigh more than 40 pounds. Grinder plate size. Meat grinders are given a number — 5, 8, 12, 22, 32, 42, and up — that indicates the size of the grinder plate. The size of the grinder plate greatly affects the type of meat, the piece size, and the amount of meat that can be ground.