[CR]Cottered Pin Threads.....

(Example: Framebuilding:Brazing Technique)

Date: Tue, 23 Oct 2007 11:54:29 -0700
From: "Rich Pinder" <rpinder@usc.edu>
To: classic <classicrendezvous@bikelist.org>
Subject: [CR]Cottered Pin Threads.....

The Durax crank on my Bertin is missing the nut on one of the cotter pins. So I went to my local hardware store, and had no luck finding a mate. I then saw a pin-set for sale on Ebay - but when it came, the pin was not correct diameter, and the nut wouldnt fit the original.

Does anyone know what threads (size or type?) we're talking about for this nut ?? Would early french items be what we call 'metric' today, or are other types involved ??

The pin is 40mm long, and the thread diameter seems about 7mm diameter at the threads.

The crank is pictured on a couple shots here: http://www-hsc.usc.edu/~rpinder/Bertin.html

thx,

Rich 'CotterNutLess' Pinder
Van Nuys, CA