Richard,
When you specify metric threads, that second number (in this case, the "x 1mm") indicates how much the fastener advances every full revolution of the head (so the Stronglight extractor advances 1mm per turn). If you're buying/using a thread dressing file for metric threads, you'll need to get one and use the size/end for 1mm threads (pretty standard).
A 1mm metric thread would correspond to 25.4 threads per inch in SAE parlance. You'll even see this number bandied about in some thread specifications, even though instances where thread systems are mixed and match this way turns my stomach a bit.
Scott Minneman San Francisco, CA, USA
-----Original Message----- From: r cielec [mailto:teaat4p@yahoo.com] Sent: Sunday, May 25, 2008 10:26 AM To: Classic Rendezvous Subject: [CR]Stronglight Crank-Extractor Thread Pitch ?
Ahoy !
Re: Older Stronglight Crank-Extractor Thread @ 23.35mm x 1mm
There are several thousand "Stronglight" positngs in the CR archives. So, while I am tediously scrolling, I am also asking the question here, please.
Is there an additional "thread pitch" value eg: 10 pitch, 8 pitch... ?
There is need to dress a buggered thread so, pitch may be of significance, I think.
Thank you.
Richard Cielec
Chicago, Illinois; U.S.A.