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PostPosted: Sat Jan 19, 2013 9:59 pm 
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big hucker
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I'm calling it a jig because it's really not a wheel truing stand. I've been wanting something to check the runout on my wheels. And, maybe tackle a wheel building project one day.

I had heard about Alumaweld rods and found some on sale at Eastwood for $5.00 shipped. I bought them and put them in my tool chest for some future project. Because of this, I decided to build my truing jig out of square tube aluminum.

Bought a piece of 1" square tube aluminum (36" long) at a home store for $11 and cut it to size.

Image

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I welded the 90 degree section and then flipped the jig to weld the 45 degree section.

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The Alumiweld rods are like brazing rods. You're supposed to be able to use a propane torch to heat up the work enough for the rods to flow into the joints. I couldn't get the tubing hot enough with the propane so I switched to a tank of map gas. Bad thing about map gas is you can cut through aluminum pretty darned quick if you don't know what you're doing. And, I don't... Most of these welds look sub-par. Reminds me of the first time I used a stick welder. Oh well, it is a learning experience, right?

Here's one of the better welds. I'm not showing a close up of the worst one. Some of them look pretty cold...

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I drilled a 23/64" hole and then used a jigsaw blade clamped in a vice grip to cut out the notches for the dropout.

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Here it is clamped up to my vice and setup with the dial indicator.

Image Image Image

Turns out the wall of the square tubing is too thin for the quick release to grab hold. I just added a washer to the mix and it clamps up nicely.

Also comes in handy when adding sealant to my tubeless tires.

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Not bad for a $11 truing jig (cost of the tubing).

Lessons learned: I'm not skilled at heating aluminum to the right temp for the alumaweld rods. And, I need to add some additional aluminum or maybe just epoxy the washer into place on the top of the jig.

All in all, I'm content with it. When I'm not using it I can toss it in the tool chest without taking up too much room and it will serve it's purpose nicely.

Alumiweld information here: Aluminum repair kits, repair any aluminum metal by welding with a Propane Torch - Alumiweld

The $5 packs of rods I bought from Eastwood don't appear to be on their website any longer.

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PostPosted: Sat Jan 19, 2013 10:27 pm 
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bad kitty!
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Nice work there Marp. :ugeek:

Another DIY wheel truing stand.


Magura :)


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PostPosted: Sat Jan 19, 2013 10:44 pm 
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pussy
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Nice work Marpilli.

My truing jig:
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PostPosted: Sun Jan 20, 2013 1:31 am 
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big hucker
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Thank you, both!

Magura wrote:
Nice work there Marp. :ugeek:

Another DIY wheel truing stand.


Magura :)


I've used it a few times for truing up a wheel. But, I decided if I ever undertake a wheel building project I'd want something like what you're showing (where it's supported on both sides).

Sti wrote:
Nice work Marpilli.

My truing jig:
Image


You certainly win for price and simplicity. ;)

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PostPosted: Sun Jan 20, 2013 10:40 pm 
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I tried that alumaweld thing a while ago... can't seem to get a good bond. Always felt like a cold solder and didn't "wet" the aluminum pieces properly. Should try again someday.

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PostPosted: Mon Jan 21, 2013 3:26 am 
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big hucker
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This was the first and only time I've used the rods. I had to heat the aluminum right up to it's melting point to get the alumaweld rods to flow. Anything less and they would stick and glob. At one point I burned through the 1" tubing and had to scrap the part and do it over. :)

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PostPosted: Mon Jan 21, 2013 9:50 am 
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bad kitty!
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Alumaweld and Technoweld, are both pretty much the same AFAIK.

I've used it a lot some 15 years ago.
It takes a good propane torch, and it takes the right size of torch.

For bigger items, some pre-heating is needed.

I've welded anything from bike frames, to Landrover engine blocks with that stuff.

When you use it, do you clean well first with a stainless steel brush?
Have you removed the anodizing?
Do you use a piece of stainless steel wire or the like, to scratch the surface below the molten material?

Magura :)

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PostPosted: Mon Feb 04, 2013 4:52 pm 
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big hucker
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Magura wrote:
When you use it, do you clean well first with a stainless steel brush?
Have you removed the anodizing?
Do you use a piece of stainless steel wire or the like, to scratch the surface below the molten material?


Just noticed your reply. Ooops...

I did clean the areas well using a small stainless steel brush.

I didn't think there was anodizing on the aluminum tubing. If there were, the brushing would have removed it. Yes?

I did not use any type of a wire to scratch the surface below while the alumaweld was molten. I hadn't thought of that. I'm guessing that's to work through any oxidation from the flame and better adhere the alumiweld to the aluminum?

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PostPosted: Mon Feb 04, 2013 6:08 pm 
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bad kitty!
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marpilli wrote:
Magura wrote:
I didn't think there was anodizing on the aluminum tubing. If there were, the brushing would have removed it. Yes?

I did not use any type of a wire to scratch the surface below while the alumaweld was molten. I hadn't thought of that. I'm guessing that's to work through any oxidation from the flame and better adhere the alumiweld to the aluminum?


The oxide builds up VERY fast again, after you remove it.
You would have to work in a vacuum to not have to deal with oxide.
So, the oxide is not from the flame, rather the opposite, as the flame keeps the oxygen away ;)

What scratching in the molten bath does, is that it allows the Alumaweld to get in contact with the base material, and thus get under the oxide layer. Once the base material is covered in molten Alumaweld, oxide can't build up.


Magura :)

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PostPosted: Mon Feb 04, 2013 7:47 pm 
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big hucker
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Makes perfect sense. As soon as I started reading your response I wanted to slap my hand to my forehead. Oxidation... Duh, oxygen...

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PostPosted: Mon Feb 04, 2013 8:12 pm 
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bad kitty!
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marpilli wrote:
Makes perfect sense. As soon as I started reading your response I wanted to slap my hand to my forehead. Oxidation... Duh, oxygen...


Conclusion: we need a facepalm smiley ;)


Magura :)

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PostPosted: Mon Feb 04, 2013 9:22 pm 
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stealth kitty
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Magura wrote:
marpilli wrote:
Makes perfect sense. As soon as I started reading your response I wanted to slap my hand to my forehead. Oxidation... Duh, oxygen...


Conclusion: we need a facepalm smiley ;)


Magura :)


Well you could add smileys --

From the admin control panel -> Click on posting tab -> select smilies on left -> scroll to bottom and look for "add multiple smileys" button.

:lol:

-S

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