Building A Uni From Scratch

I hope this helps:

http://tinyurl.com/5zlho

🙂

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Krashin'Kenny - Crash Tested

If you ain't crashing, you ain't going fast enough!!!!!!!!!!!

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Soo, sounds like ovalized the tubes will be the hardest thing for me to
do since my school doesn't have a press. I'm hoping I can keep the tubes
circular at the top then start ovalizing the tubes when they get closer
to the bearing holder. I'll have to do it by hand with a hammer and
forge 🙁 I do love hitting red-hot metal but that sounds like a of
careful work.

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Gobd
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this guy I new made a wood uni

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CRAZY legs - "I need some skills"

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Gobd said:

*Soo, sounds like ovalized the tubes will be the hardest thing for me
to do since my school doesn't have a press. I'm hoping I can keep the
tubes circular at the top then start ovalizing the tubes when they get
closer to the bearing holder. I'll have to do it by hand with a hammer
and forge 🙁 I do love hitting red-hot metal but that sounds like a of
careful work. *

The results aren't as nice, but you could ovalize the tubes near the
bearing holders using a large vice. Only the lower 6 inches of the
tubes will have to be ovalized. Place the tubes horizontal in the vice
with a piece of steel plate about 10 inches long on each side of the
tubing to keep the vice jaws from denting the tubes. You may be able to
ovalize the tubes without using any heat by compressing it in the vice,
depending on the wall thickness.
If you cannot accomplish this without the use of heat, using a torch to
heat the tubing and a vice to compress it will yield much more accurate
result than banging on it with a hammer. Leave the frame legs longer
than you need them while going through the ovalizing procedure so that
you can cut them to length from both the bottom or top to achieve
uniformity in the taper. This will make it easier to keep them
symetrical

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Krashin'Kenny - Crash Tested

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For frame fabrication TIG is really the only way to go. MIG *can* be
used, but TIG will yeild far better results.

Ovalizing the tubing isn't always neccessary. Using 1/2" round tubing
you can make a plenty nice Hunter-esque frame.

Have you considered machining the frame instead? TIG welding is very
difficult, and unless you already know how, you probably won't be up toi
welding up your frame by the end of the school year. You will need to
make a welding jig, used to hold everything. You then tack everything
together, check squareness, and then do the actual final welds.

I am machining a frame from aluminum right now, and it takes a long time
to machine, but it works. It's far easier to learn to do simple milling
operations than it is to learn to TIG weld.

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gerblefranklin - Trials Unicyclist

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