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hp246 04-03-2011 08:49 AM

Welding Aluminum
 
I'm considering adding a Meco Midget for welding aluminum and working with sheet metal. Would like to hear from anyone using this little torch, especially for aluminum. I know a lot of people talk about the Henrob/Cobra/Dilllon, but I really don't need to cut with it, and its about 3 times the cost of the Meco.

TubeTek 04-03-2011 09:19 AM

I can't say anything one way or the other about the midget, but we've got a couple sets of standard size Meco torches that have held up very well over 25 years of use.

Regardless of the torch you use, gas welding of aluminum is lots easier if you use hydrogen as the fuel source rather than any of the other gases. The lower flame temp and lower heat content of hydrogen matches the characteristics of aluminum better and makes the job much easier. There's aso a flux you paint on the joints to get rid of the aluminum oxide when gas welding aluminum.

I certainly can't do it myself, but I know a guy who can gas weld aluminum using hydrogen and the flux, and his results are as pretty as any aluminum sheet tig work you'll ever see.

bentwings 04-07-2011 01:26 AM

You also need the proper glass lenses. The new ones are orange. The old ones were blue. You will not be successful without these.

oldred 04-07-2011 07:41 AM

Quote:

Originally Posted by bentwings
You also need the proper glass lenses. The new ones are orange. The old ones were blue. You will not be successful without these.


Bent, the blue ones come two ways the real Cobalt blue lens and some cheaper ones that are simply a blue shade and although the Cobalt are ridiculously expensive they are worth it. I have not tried the Orange, do they work as good as the blue?

bentwings 04-07-2011 04:03 PM

I was told the blue Cobalt ones are not available and the orange ones are the replacement. I'm going to a big metal seminar for 4 days at the end of the month and there will be aluminum gas welding. I guess I'll find out for sure.

oldred 04-07-2011 04:55 PM

Interesting since my lens is showing it's age (just like me anymore :pain: ) and will require replacement soon, actually should have been replaced a long time ago. When this post came up I did a quick search and the Cobalt lens seems to be around $49.99 with some places asking as much as $79.99.

hp246 04-07-2011 05:09 PM

Quote:

Originally Posted by bentwings
I was told the blue Cobalt ones are not available and the orange ones are the replacement. I'm going to a big metal seminar for 4 days at the end of the month and there will be aluminum gas welding. I guess I'll find out for sure.

Would be interested to hear what equipment they are using. Thanks for the tip on the lens. Will check it out.


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