I have successfully rethreaded Raleigh BBs to 24 tpi and then faced them down to 68mm shell width - it needs a little bit of care but with the rethreading its more that the threads get realigned than a lot of metal gets taken away.
Hilary Stone, Bristol, England
MARK wrote:
> First off, I apologize for the lack of a heading on my original post about
> my 26 TPI Super Course mixte. The email got stalled in cyberspace on my fir
> st click of the send button, and for some reason the heading didn't survive
> to the next send.
>
> Thanks to all who responded. One lister had a shop successfully re-tap t
> o 24 TPI.
> I could and have used a crank-appropriate spindle with the original cups
> , but the shell was not well machined and therefore would not adjust as
> well as I like. Since I only have only standard English threading in my
> Campy tool case, I can't even face the shell, so that is why I was asking a
> bout the re-tapping idea. I guess I could go with the Phil 26 TPI rin
> gs, and certainly a non-Phil cartridge would be cheaper. I was trying to
> get out of the situation on the cheap. I guess I'll
> have to mull this over a bit. I had only researched this topic thru the
> CR archives. A wider search offered many opinions, including old reliab
> le Sheldon Brown, who says it's OK if you use a quality guided tap-set, whi
> ch I fortunately happen to have.
>
> Mark Hoffman
> New Britain, CT
> USA