Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Ahhh ,I remember it well. that grinder flywheel was one of the hardest things to put a groove in...dulled a carbide bit instantly , it had a very hard shell on the outer edge of the casting , but once you got past that it was pretty soft. to actually "Grind" a coffee bean takes a fair amount of brute strength ,they don't like to be ground