Monday, March 25, 2013

Not Fragile

Hey y'all.

  This bike is made for Colby Weber.

It's got some interesting lug work on it.
Y'all say you're into pics of metal work, so here's some highlights.
The head tube lugs on this bike are made by me, so this is how I do it.

First off, I braze the tubes together at their correct angles and finish them, just like any other joint.

Next I cut them apart and put the head tube portion into the lathe to bore them out to the right diameter for the tube that will fit inside. Boring the tubes out once they've been brazed allows for a lighter lug.
There is a certain amount of distortion that happens when you weld things together and a thicker wall minimizes that distortion. Once it's all brazed up, you can get rid of the excess and make sure the lug has nice round sockets.

 I cut out a rough window in the head tube to access the inside of the lug.

Next I chuck the top tube part in the lathe and cut out the back wall of the tube.

With the same half in the lathe, the top tube portion is bored out to fit what will end up being the top tube. 

Roughly cutting out and shaping the lug.

 Skip ahead :

A couple lugs ready to be brazed.

All brazed up.

Colby is going to be riding this thing up and down the canyons of the Wasatch Front.
Look out.

I'm certainly not the first one to use a half tone fade, but it always looks cool.

 Here's those lugs.


A little of the old and new.
Old school Cinelli style bridge reinforcements with a PF30 bb shell.

Not the usual lug lines.

Thanks, Colby.

Mom, you probably won't like this one.