Originally Posted by
Road Fan
Yes, I would want shearing action at the interface between the BB cup-turned-chaser and the BB shell, and if it could lift the crud away from the cutting area, that would be great!
Bingo! I have seen a home made cup/chaser that had the cutting edge made from the cup's "skirt" and not across the threads. This will both allow a deeper cutting form and also tent to push the crud ahead of the cup and not have ther crus re crammed back into the threads as much. Funny how memory is activated and when it's not.Andy