Author Topic: Welding Chainsaw Parts  (Read 4490 times)

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Offline Cut4fun .

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Re: Welding Chainsaw Parts
« Reply #30 on: November 20, 2012, 08:52:58 pm »
Nice  8). Wouldnt have figured it would have held in that lower area of handle. Good Job once again.

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Re: Welding Chainsaw Parts
« Reply #31 on: January 05, 2013, 11:09:19 pm »
This was a ad at the top of a forum I was reading on. What do you guys think?

http://aluminumrepair.com/land/index.asp?src=google&gclid=CLSXoLHt0rQCFYw-MgodRl4AhA
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Re: Welding Chainsaw Parts
« Reply #32 on: January 05, 2013, 11:26:16 pm »
I don't think a regular propane torch will melt that solder?
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Offline Cut4fun

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Re: Welding Chainsaw Parts
« Reply #33 on: January 05, 2013, 11:40:19 pm »
I don't think a regular propane torch will melt that solder?

Click on the 6min video in top right hand corner of the page.
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Re: Welding Chainsaw Parts
« Reply #34 on: January 05, 2013, 11:51:02 pm »
Well we all know that magnesium is flammable and hard to put out once started.   The argon gas on a Tig welder is what helps to prevent it from catching fire plus it prevents oxidation from the oxygen in the air.  If you get a piece of magnesium hot enough with a torch what is there to stop it from catching fire and how can it be stronger than welding with a Tig and argon gas if there is oxydation occuring in the weld.

 
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Re: Welding Chainsaw Parts
« Reply #35 on: January 06, 2013, 12:03:28 am »
They were using Mapp gas on the thin stuff. On the automotive cylinder head they had something big like a rose bud for a torch. They have the Mapp gas at most hardware stores as well as the torches. Mapp gas is in a yellow tank.

If you've ever seen a magnesium fire you will be very scared of it. I used to melt a lot of scrap aluminum in a foundry and occasionally would get a piece of magnesium in the pot. There would be a big flash (like a photo flash bulb) and it was gone.

This stuff has been talked about a lot in the model airplane glow engine forums and seems to work great on the die castings.
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Re: Welding Chainsaw Parts
« Reply #36 on: January 06, 2013, 12:08:19 pm »
Sorry guys I meant this for aluminum fixes only and realize I posted in the mag welding part now.   

There was a thread about welding on cylinders somewhere.
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Re: Welding Chainsaw Parts
« Reply #37 on: January 06, 2013, 01:02:36 pm »
Ok sorry I did not know you meant it for aluminium.

   I saw this demonstrated some years back at a swap at I was at one  time.   If I remember right the flame had to be at just the right distance and heat range to get it to work and flow real nice.   It would take some practice but I can see it working.   The other thing about aluminium is that you have to clean the surface real good because of oxidation.   The oxidation actually takes more heat to get through then the aluminium itself.   So you have to clean it well enough to get ride of the oxidation.   I use a stainless steel brush because once again a regular steel brush will contaminate the weld.   I think scotch brite works well too.  Hope this helps.
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Re: Welding Chainsaw Parts
« Reply #38 on: November 18, 2013, 08:18:34 pm »
I wanted to show a before and after of a weld job on a Poulan 3750 Tim Allen.   The area where the chain adjuster sits was broken out because the clutch cover got tightened down on it.   A lot of the welding was done from the back side.


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Re: Welding Chainsaw Parts
« Reply #39 on: November 18, 2013, 08:23:26 pm »
Here is a picture of the saw all back together and ready for cutting.

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