Sunday, August 18, 2013

Chasing threads on bottom bracket

Now that I have my French thread taps for my Campagnolo 721 set, I thought I had better put them to use.

The France-sport has been waiting on this tool for quite a few months before reassembly, so it was my first frame to experience chasing threads on.

Careful preparation, included having a copy of Barnetts manual open on my computer and drawing the correct thread direction on the frame in sharpy.

Thread direction drawn in sharpy

Taps all the way in

Tailings 

tailings

Tailings
I followed the "cut and clear" procedure outlined in Barnetts. I also used much more Park cutting oil than I would have without the dire warnings in Barnetts.

All went well. When I finished I cleaned the threads and taps with white spirits using a toothbrush. I sprayed the Taps with WD40, and coated the threads with grease. Before greasing, I tried new BB cups and they threaded in nice and smoothly.

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