Re: [CR] Campy 1010B Dropout question... adj bolt diameter size and thread pitch?

In-Reply-To: <000f01c3938a$23406ae0$cbb71b18@cinci.rr.com>
References: <000f01c3938a$23406ae0$cbb71b18@cinci.rr.com>
Date: Thu, 16 Oct 2003 00:04:04 -0400
To: "Steve Neago" <questor@cinci.rr.com>, "classicrendezvous" <classicrendezvous@bikelist.org>
From: "Sheldon Brown" <CaptBike@sheldonbrown.com>
Subject: Re: [CR] Campy 1010B Dropout question... adj bolt diameter size and thread pitch?

Quoth Steve Neago:
>I have to re-tap a Campy 1010B dropout derailleur hanger soon and am
>trying to find the correct tap specs.
>
>I need to know what is the appropriate diameter in millimeters for
>the adjusting bolt and its thread pitch. I will be using a Campy SR
>derailleur.

The adjusting bolts are 3 mm x 0.5. Derailer hanger is 10 mm x 26 tpi, but 10 mm x 1 mm is so close as to be interchangeable for such a short thread run (that's a 25.4 mm pitch, vs 26 even.)

This is _not_ a standard metric thread, and you won't find such a tap in a hardware store, but better bike shops can supply them. We stock the Park one, see: http://sheldonbrown.com/harris/tools-h-z.html#tap

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