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Tool Talk Discussion Forum

Old Miller Welder

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William Kahler

04-09-2008 13:15:38




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Was looking to see if anyone here can help me with a old welder that i found in a clean out this week. It says it is a Miller Thunderbolt 225 then it has a number 706 A4 on it. Was referred to this site from guy on another forum. It is OLD and i am not sure if it is going to safe to use it has a 30AMP plug on the end that needs replaced and was going to check on maybe trying to find a old Manuel for it?? Any help is great and much appreciated!!

Bill

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DEAN ZINGRE

04-13-2008 13:23:16




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 Re: Old Miller Welder in reply to William Kahler, 04-09-2008 13:15:38  
WILLIAM - I HAVE ONE OF THOSE MILLERS! HAVE USED IT FOR YEARS. GREAT LITTLE MACHINE. I USE MINE ON D.C. 100% OF THE TIME. NEVER HAD A PROBLEM.



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William Kahler

04-10-2008 04:03:00




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 Re: Old Miller Welder in reply to William Kahler, 04-09-2008 13:15:38  
I got my owners Manuel and am going to try and work on it here later. I might end up giving it to a buddy of mine that will us it a lot more then me seeing as i might weld once every few years if that. So i figured me would probable be able to put it to better us then me letting it sit in the shop with dust collecting on it. I am a electrician so running the wire and determining that is not a big deal to me just the cost is grander for the larger #6 wire. Thanks for all the insight it has been a great help!

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old art

04-09-2008 21:04:49




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 Re: Old Miller Welder in reply to William Kahler, 04-09-2008 13:15:38  
goto miller welders .com and the findyour way around there is a place to enter the modle # & serial # and you can print out the manual i did jurt that last mounth on a engine welder good luck old art



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Joe Breshears

04-09-2008 19:30:43




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 Re: Old Miller Welder in reply to William Kahler, 04-09-2008 13:15:38  
If that welder works, it'll be a grand old welder. Should it hum but not make an arc then it would likely have burnt diodes, which go when someone works the machine too hot and hard, as in constantly welding thick material with high amperage as in a commercial job. Replacing diodes is not brain surgury and is worth it for what it costs. A wiring diagram will help you understand it. The basic electricity lesson your machine will give you is invaluable.Your older machine is better than lighter newer ones with electronic placards to burn out when you weld hot. Install it with the 50 amp service if practicable because you will sooner or later want to weld things thick enough to require more amperage then the 30 amp service will provide. The amount of electricity you consume is determined by how high you set the machine, not the size of the breaker. I have revived some old Lincolns I got as salvage, and they weld like mad. Enjoy, Joe

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john908

04-09-2008 17:55:16




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 Re: Old Miller Welder in reply to William Kahler, 04-09-2008 13:15:38  
If you don't use your welder a lot,maybe you could mount the 50amp receptacle next to the service panel and do your welding there.Less then a foot of wire would keep the cost down.



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Stan in Oly, WA

04-09-2008 15:33:19




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 Re: Old Miller Welder in reply to William Kahler, 04-09-2008 13:15:38  
Hi Bill,

Some stick welders will run successfully on a 30 amp breaker, and some won't. Most can be made to work if they're run at low amperage settings, used in short welding intervals, and given lots of time to cool down after each interval. Conversely, I suppose, even a machine that normally didn't trip a 30 amp breaker could be made to do so if it were run hot and long.

Most single phase welders will work without any electrical supply related problems on a 50 amp breaker that is supplied by number 6 copper wires.

All the best, Stan

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Don Anderson

04-09-2008 14:06:34




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 Re: Old Miller Welder in reply to William Kahler, 04-09-2008 13:15:38  
For a manual go to millerwelds.com and you can print out a manual for no cost.



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cowman1

04-09-2008 14:04:49




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 Get Hold of Re: Old Miller Welder in reply to William Kahler, 04-09-2008 13:15:38  

Get Hold of Miller they will supply you with a book just give them the model. May be able to get it off the net too. That cant be to old (78up) machine The front handle is the newer of this type.



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Billy Joe

04-09-2008 13:18:58




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 Re: Old Miller Welder in reply to William Kahler, 04-09-2008 13:15:38  
If that's the one with the crank handle on top to adj amps, I've owned one and was quite satisfied with it's performance.

I thing the 30 amp service might be a bit light.

And I always used mine with AC specific rod with very respectable results.



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William Kahler

04-09-2008 13:36:28




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 Re: Old Miller Welder in reply to Billy Joe, 04-09-2008 13:18:58  
This one has the crank on the front that runs up a little metal strip to the voltage that you want to us. What size service would you suggest? What is the difference when you us a larger service?



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TimV

04-09-2008 18:03:56




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 Re: Old Miller Welder in reply to William Kahler, 04-09-2008 13:36:28  
William: 50 amp is a very popular size for this size of welder. Going larger than 30 amp will allow you to weld at higher amperages and for longer periods without tripping the breaker.



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