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Tool Talk Discussion Forum

miller ac/dc thunderbolt

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easom

05-02-2007 07:19:56




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Seller wants $300. It is older one in very good cond. 460 volts, 24 amps, single phase with cart and 20' leads. I want to learn to stick weld. Is this a good price? Opinions?




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IA Roy

05-03-2007 19:35:22




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 Re: miller ac/dc thunderbolt in reply to easom, 05-02-2007 07:19:56  
460 or 480 volt is also 3 phase, so converting to 240 single phase is quite questionable.



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easom

05-02-2007 11:44:12




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 Re: miller ac/dc thunderbolt in reply to easom, 05-02-2007 07:19:56  
As usual,thanks for all the good advice...the idea about taking a class at community college sounds very good.. I'll also check out miller's website on converting to 230 volts...



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T_Bone

05-03-2007 04:31:32




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 Re: miller ac/dc thunderbolt in reply to easom, 05-02-2007 11:44:12  
Hi Easom,

My book shows the 460v model only is available in 460v.

There is a 230/400v model available and a 115/230v model.

I bought my son this machine new at $425 a couple years ago at my local Miller dealer. Nothing to right home about as I would compare it too a DC opperated AC buzz box. Good enough for home shop use but it sure isn't a stable arc machine of higher quality.

I agree, take a Vo-tech welding class as then you won't pick-up any self taught bad habbits you will need to get rid of latter on. Some of those bad habbits are very tuff to get rid of if your wanting to be a good rod burner.

T_Bone

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Stan in Oly, WA

05-02-2007 10:10:44




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 Re: miller ac/dc thunderbolt in reply to easom, 05-02-2007 07:19:56  
Hi easom,

There's no better way to learn to weld than to take a class at the local community college, voc-tech, or high school. You'll be a more discriminating shopper after you use a variety of equipment, and you'll buy yourself time to let a better deal come along.

Stick is my favorite welding process for a number of good reasons, but that puts me in the minority these days. You may want to give yourself the chance to use GMAW (MIG/wire feed), which is the overwhelming choice of new welders before you decide what to buy. You might even find yourself in the select company of those few who find that GTAW (TIG) best suits their tastes and needs.

All the best, Stan

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Tim B from MA

05-02-2007 09:28:13




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 Re: miller ac/dc thunderbolt in reply to easom, 05-02-2007 07:19:56  
I also would bet that the machine can easily be converted to 230 volts.

As for price, I believe those machines go new on the order of 400 to 450+ depending on size - one model is like 200 amps, the other about 230.

Do a search for on-line welding suppliers for new price comparisions, and look at the Miller web site RE: converting to 230 volts.



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IH2444

05-02-2007 07:24:21




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 Re: miller ac/dc thunderbolt in reply to easom, 05-02-2007 07:19:56  
Not a bad price, but do you have 460 volts available ? That is commercial voltage.



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easom

05-02-2007 07:33:33




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 Re: miller ac/dc thunderbolt in reply to IH2444, 05-02-2007 07:24:21  
As soon as I sent the post I realized that I didn't have 460 volt service. thanks so much for the reply, though. this is a great forum..I read it all the time.
If I find one at 220 volts, what is a good price? I want "dc" because I've been told it makes it easier to weld thin metals.



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IH2444

05-02-2007 09:54:59




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 Re: miller ac/dc thunderbolt in reply to easom, 05-02-2007 07:33:33  
The elcheapo AC/DC units go for $350-400. So a good heavy unit like that one would be a reasonable buy at $300. I think the Lincoln tombstone AC/DC welders are going for close to $400.
the Stickmate for a bit more...
But I think the stickmate is less current and duty cycle than the Thunderbolt.
If it will work on 220-240 then get it would be my recommendation. Of course at 220 it would draw at least double the current. A 60 amp 220v corcuit should work for it.

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mjbrown

05-02-2007 07:30:56




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 Re: miller ac/dc thunderbolt in reply to IH2444, 05-02-2007 07:24:21  
It may be that there is a set up inside that machine that allows a couple of tabs to be changed to make it a 240v machine, I have an old Gold Star that has that arrangement.



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