Homemade minced beef

I recently acquired an excellent toy from a thrift store. It's a second-hand powerful meat grinder. It costed me only $8, but brought unlimited joy to our home. By and by, I'm learning how to handle this brute.

1. Like any motor-driven devices, it probably will last long when it runs in pulses instead of grinding non-stop. 
2. In addition, the meat grinder seems to do well with lean meat, but easily gets jammed with meat that has mixed tendons and fat. Well, that's a good thing, since I bought it primarily to make lean ground meat.
3. The grinder works best when the meat is rather dry, not watery. 
4. Cutting the meat into 1" pieces helps increase the efficiency and prevent jamming. 

Fresh lean beef, trimmed of all fat, and dry (this is in the best condition for mincing):

Meat grinder:

Resultant lean beef: