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Italian threaded BBs(6 posts)

Italian threaded BBsmass_biker
Oct 14, 2002 6:22 AM
Building up an old Italian (lugged steel, natch) frame for a fixie and I am confronted with an Italian threaded BB. Anything I should know about this as I slap parts onto it?

Many thanks

MB
dont thread it the wrong way?ColnagoFE
Oct 14, 2002 6:36 AM
Other than that, you might have more chance of the BB coming loose so keep on top of making sure it's tightened correctly.
right hand threads only...C-40
Oct 14, 2002 7:47 AM
The BB threads are right hand on both sides.
right hand threads only...useless triviaPicshooter
Oct 14, 2002 1:05 PM
I was told the reason for right hand only was that the builder started the tap on the left side and ran it all the way through the bottom bracket.
re: Italian threaded BBsDaveG
Oct 14, 2002 8:28 AM
I built up my first Italian threaded BB this spring and can pass on the lessons of my mistakes. First, the right cup is not reverse threaded as others already pointed out. This means that it is much more prone to loosening. Recommend you wrap the threads with a couple of turns of plumbers Teflon tape and then torque it down to spec. When I finally decided to use a torque wrench (after the right cup loosened on me) I was amazed at how much force was required to get to the spec'ed torque (~600 inch/lbs for a Campy BB). Doing it by "feel" turned out to be way too loose.
if i remember correctly....Alexx
Oct 14, 2002 2:00 PM
Italian threading uses a slightly larger diameter than english threading (or was it the other way around??). If so, you can usually take a stripped english BB, and have it threaded to Italian threads, saving the frame. If you strip the italian threads, the frame is toast. I hope I got that correct.