[CR]one last bite at crankarm pedal hole rethreading


Date: Tue, 8 Nov 2005 08:28:28 -0800 (PST)
From: Riccardo Bulissimo <rbulissimo-bike@yahoo.com>
To: classicrendezvous@bikelist.org
In-Reply-To: <MONKEYFOODmBMUKUVyA00005687@monkeyfood.nt.phred.org>
Subject: [CR]one last bite at crankarm pedal hole rethreading

Once more, the digest lag has ensured I can't offer much more to maTeo's question about pedal hole thread repair other than this. ( I have used the helicoil set mentioned on by another poster many times and with 100% success) here is another spin on it's usage, since some members seem unfamiliar with this "retap and insert" system:

I have made several tandem cranksets (which in the "crossover" mode required right hand arms threaded left and vice-versa) by using the helicoils to accomplish this reversal. Just be careful when using the oversize tap to go the "wrong" direction on the arm. My old taps have a nice reamer portion to start with, so it isn't too hard to do. I agree with the suggestion to start from the backside in all situations dealing with cleaning up/rethreading crank arms. I saw a tandem crankset on ebay a long while ago which was made this way; I wondered if it was one I had made along time ago.

Riccardo Bulissimo

Hypercaffinated in

Verdi, Nv

Hey, M! where's my saddle, boy?