The simplest bicycle framebuilding jig I could come up with...

Step 9: That's it!

Go build a jig.
Like I said earlier, I'm licensing this design with the Creative Commons Attribution / Sharealike license. Do whatever you want with the design. If you want to machine and sell parts kits for it, go for it. Just give me and these instructions credit. And if we run into each other, you could buy me a beer or maybe hook me up with some 29" tires.

Have fun.

-Marc

Comments

[bikerusl]

Thanks, that's so awesome. I helped make a fork fixture using your guide as inspiration. It was so much better than the old jig (mode from MDF and scrap steel) I tacked up 3 forks in about an hour and usually it would have taken that long for 1.

[nameofdane]

How does the jig react to the heat from welding or brazing? Any problems with distortion or with splatter damaging the jig? Excuse me if this was addressed in the 'able, but its been a while since I read through the whole thing.

Thanks for putting this together, I look forward to putting one together.

[drwelby]

Well, you should only tack in the jig so it's not going to get all that hot or exposed to damage. Plus it has a lot of mass and surface area to keep it cool.

On a technical level, as an extrusion the aluminum will distort in more unpredictable ways than mic 6 aluminum tooling plate when it is heated. But if you're that concerned about accuracy., you shouldn't be making this jig.

[Spency]

Could this setup be used for a track bike? I'm just starting and I was curious. If this current setup can't be used to make a track frame how would you alter it?

[drwelby]

It will work fine for track frames.

[qsc]

Marc, Great instructable! Thinking about running out to the local machine shop supply store today and grab a bunch of stock to build one. I do have a few questions though. 1. do you weld or braze your frames in this jig? 2. If so how do you get access to the "backside" of the frame in this jig or do you spot braze and then finish braze elsewhere?

[drwelby]

1. Both 2. You only tack in the jig, then remove the frame, check the alignment, and finish your braze/welding in a Park stand.