Northern Industrial Tools makes a fantastic 32 meat grinder. It is my preffere meat grinder on the market.

You can get a grinder attachment if you have a mixer. Otherwise try the Weston 82-0102-W Electric Meat Grinder.

The basic parts are: 1) a hopper or funnel at the top of the grinder through which the meat passes through, 2) a horizontal screw conveyor that moves the meat towards 3) sharp blades that grind and cut the meat and 4) plates that the meat extrudes through.

To grind meat into small pieces

This will vary depending on your brand of meat grinder. But you can check out this site: http://www.food-equipment.com/