Bicycle frame building class day one

April 12, 2010 · 4 comments

I started a frame building course at United Bicycle Institute where they teach how to design and fabricate a bicycle using chromoly tubing and brazing . Today I learned how to braze a water bottle boss, miter a tube for a lug, and lug brazing.

The photo shows my first attempt at a lug braze. I cut it in half to look at how well the silver flowed between the joints. Lug brazing is a skill that takes practice. As you can see, I need practice.

The prep work on the lugs and mitering the tube to fit takes a lot of filing and fitting.

I’ll try to post a picture a day of what I made so you can see my progress. At the end of two weeks I’m supposed to end up with a finished frame that I can build up and ride. This is a whole lot of fun.

{ 4 comments… read them below or add one }

1 pdxebiker April 12, 2010 at 7:59 pm

It’s a dream of mine to take this class – please do post photos, if only so I can live vicariously through your experience!

2 Dan April 12, 2010 at 8:29 pm

Will do @pdxebiker. I have dreamed of taking this class too but the distance was a barrier. Now that they are in Portland, it’s a snap. The facility is really nice.

3 Dan Rasay April 13, 2010 at 12:15 am

Too bad you can’t shoot video too…

Do you have a setup to do brazing in your shop?

4 Dan April 13, 2010 at 6:03 am

Yes, I’m all set up to braze. I did some fillet brazing on the Chop Mountain Bike project. It was the first time so some instruction will get my skills closer to where they need to be. It’s not an easy thing to do.

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