9.07.2011

I go where I'm thread.

Somehow, I think I knew this day would come. I do not believe it was by chance that I purchased a die handle and a 1" 24tpi die off of ebay a few months ago. I used them today to extend threads on my new fork for the Rockfish F-1 BMX.  The fork had 1.5" of threads already cut, but I had to extend them another 1.75" to make it compatible with my head tube. Park Tool's article on thread cutting was really helpful.

Fork prior to cutting more threads. I threaded down into the black painted area.
My awesome die handle.
1" steerer x 24tpi

Thread shavings. Clear these by spinning 1/8 turn backward every 1/2 turn.
First pass, super oiled up. Copious amounts of lube required.
First pass.
Second pass.
Third pass, all clean and all done!
All in all, it probably took me an hour of work and a lot of arm strength. I had to make several passes with the die set at slightly different diameters. During the first pass, the die is set quite open. The die is closed a little with each following pass to cut the threads a little at a time. I used almost all of my chain lube in the process.

The title of this post is a play on a lyric in a Silver Jews song - Pet Politics.

6 comments:

  1. Very cool. I'm impressed and jealous. Things like this are my next step. I want to start acquiring the proper tools to do things like this, as well as frame straightening, and bottom bracket work, etc... I hope to build my own bike from scratch one day too. There is a great place near me here in Birdsboro, Pa called Cedarboro Bikes. This guy has built his own frame building tools even. I don't know if I'll ever get to to learn from him, but I hope so.

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  2. Thanks Matteo. This is definitely advanced mechanics in my book. I'm pretty stoked it went so well. I might be aligning my rear dropouts on the ROckfish sometime soon - I could either take it into work and use the "proper" tool or devise a simple tool to do it myself... I think I need to keep up the DIY spirit.

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  3. Lookin' sexy there, Tommy!

    Brady
    Behind Bars - Motorcycles and Life

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  4. Thanks Brady. My new lingerie does wonders.

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  5. Very impressive stuff. The picture titled - 1" steerer x 24tpi could hang in an art gallery. -Will

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  6. Cool tool. I don't have one of these...

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