Grain Mills..... Best one, Why? | Homebrew Talk - Beer ...
For longevity, a Corona mill would probably be best. Wear is almost nonexistent. The rollers in roller mills may be hardened steel, (various types may be available), but they are more prone to wear because they are knurled, as opposed to grooved. If you can find a grooved roller mill, and have the change to spare, buy that. If not, buy a Corona.