MIG welder questions

I am about to buy a '93 Mack CH613 tractor with an aluminum dump trailer. The trailer will need relining soon. The seller estimates it will cost about $1,000 to have the welding done. He already has the sheet aluminum. I am considering buying a Lincoln SP-175 MIG welder to do the work instead of having it done. There are two versions, the SP-175T and the SP175+. Anyone have experience with this machine? Is the more expensive version worth it? (It has continuous voltage control, but adds about $80 to the price.) Both machines require a $45.00 kit to push the aluminum wire. I have MIG welded steel, but not aluminum. Is it all that hard to learn? Is there a better place to buy than:

The welder plus the consumables will be about the same money as having the welding done, but I get a new (tax deductible) toy! On the plus side, this seller will ship this machine for $7.50! I called to verify this, because it sounded too good to be true. I originally found this welder on Ebay, but this dealer is cheaper, and buying from the dealer guarantees the three year warrantee. Oh, and I already have a spare oxygen bottle that can be swapped for the bottle needed for the MIG. All opinions welcome. Thanks,

Ron Thompson On the Beautiful Florida Space Coast, right beside the Kennedy Space Center, USA

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Severe stupidity is self correcting, but mild stupidity is rampant in the land.

-Ron Thompson

Reply to
Ron Thompson
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"Ron Thompson" wrote: (clip) On the plus side, this seller will ship this machine for $7.50! I called to verify this, because it sounded too good to be true.(clip) ^^^^^^^^^^^^^^^ I bought a Lincoln 135 from Indiana Oxygen, and they shipped it free. Dealing with them was a pleasure. I don't know how their price would compare, but they usually have listings on e-bay with "buy it now" pricing. so it should be easy to check.

Reply to
Leo Lichtman

No.

That's worth it.

A different "hose package" (as we call it). Or just the core? Swapping just the core is a PITA, you should ask what includes the extra 45$. I doubt that you get a complete package for that prize. Also, the wire-driving rolls are different for Al. Are they included?

No, not that difficult. After you have found out the propper setup (volatge and feed) you are done. 1 hour of experimenting and you know it. Be aware, that the welds don't look very nice and that you will have troubles welding below 2 mm of thickness. Preheat the part where you start to weld.

That's always an argument :-)

HTH, Nick

Reply to
Nick Müller

Thanks, I saw their listing. They are higher than the place I linked to, even with the shipping.

Ron Thompson On the Beautiful Florida Space Coast, right beside the Kennedy Space Center, USA

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hobby pages are here:
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Severe stupidity is self correcting, but mild stupidity is rampant in the land.

-Ron Thompson

Reply to
Ron Thompson

I actually saw the Lincoln Electric 175 at Home Depot the other day for $599. Not sure what version it was, probably not the plus, but that still seemed like a great price. I have not seen that at all the Home Depots, but the one by my house has it. Also, I noticed that Sears carries Hobart on their website, not sure if you can get it from them in the store, but they seemed to have very competative prices to, to my surprise.

Reply to
sparty

Thanks, There is a cheaper Lincoln series made for the retail market. I think it is called "Pro MIG" and the dealer can't even get it. It is quite a bit cheaper for the same ratings. I was warned to stay clear of them for serious work.

Ron Thompson On the Beautiful Florida Space Coast, right beside the Kennedy Space Center, USA

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hobby pages are here:
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Severe stupidity is self correcting, but mild stupidity is rampant in the land.

-Ron Thompson

Reply to
Ron Thompson

Hi Ron,

IMO, I don't think this is a big enough machine to do what you what.

Rated: 130 amps, 20 volts, 30% duty cycle

It also looks like it has a 10 foot whip, which is a long ways to try pushing aluminum wire. Most people that do serious work use spool guns for aluminum.

Per the spec sheet from Lincoln, (see:

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for this info direct)it is only rated for 22 gauge to 3/16 inch for aluminum. If you preheat, you can get 3/16 to 1/4 inch, which I think is stretching it a bit. The 30% duty cycle will kill you trying to weld for any period of time other than short bursts.

If you are going to be welding on a large aluminum dump trailer, you better get something with some oomph! I would watch for a Millermatic 200 (or 210) with a spoolgun used. These are 200 amp machines with _60%_duty_cycle_at_the_full

200_amp_machine_output. Lincoln has similar machines, but I'm not familiar with their comparable model. I'm sure somebody else will know that :)

I bought mine new ~15 years ago. Figure about $1500 for the welder (this included the argon/CO2 mix, bottle and flow regulator) and another $1000 for the spool gun, new prices.

Just my 2 cents worth (shrug).

Reply to
Leon Fisk

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