Originally Posted by
dddd
This all seems to raise the question as to what the cups for this setup look like.
I imagine the bearings sit deep in the cups, and that the cups could be Italian-threaded.
But somehow I'm having trouble imagining a normal-sized fixed-cup flange with wrench flats.
On the one I had--and presumably on the rest of them--it's a pair of unthreaded metal bowls with flanges like smaller versions of #64 or #66 cups for Ashtabula cranks, as below. They just pop into the BB shell and the rest of the bearing assembly gets installed normally. Not a bad setup, but one that is usually found on lower end Euro stuff; Chiorda, Crescent, Kalkoff, etc.
I was shocked when I saw it at first, taking apart a dirty, greasy BB only to discover pristine white-painted (frame color) threads in there that just
had to fit a standard part. Went and fetched a pair of Italian threaded cups out of the parts drawer and...bingo!