Miller Electric

Welding Discussion Forums

Home » Resources » Communities » Welding Discussion Forums
 
Miller Welding Discussion Forums - Powered by vBulletin

Results 1 to 9 of 9
  1. #1
    Join Date
    Sep 2011
    Posts
    20

    Default thunderbolt AC/DC 225 copper or aluminum?

    looking at a used thunderbolt AC/DC, wondering if it is copper or aluminum? anyone know?

  2. #2
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,473

    Default

    Quote Originally Posted by 65-408 View Post
    looking at a used thunderbolt AC/DC, wondering if it is copper or aluminum? anyone know?

    Actually Copper and aluminum, whats the purpose of your question....

  3. #3
    Join Date
    Sep 2011
    Posts
    20

    Default

    Quote Originally Posted by cruizer View Post
    Actually Copper and aluminum, whats the purpose of your question....
    Unlike alot of people, I am generally not afraid of buying used equipment, especially something as robust and simple as a transformer based arc welder. I fact, I find that alot of times, the older equipment is built better than the new. I am wondering if this is the case here as well, when comparing the older thunderbolt design (ac/dc with the top handle) to the current thunderbolt XL. I know that aluminum will conduct the electricity just fine, but I believe copper is better for these machine. Just wondering what the Thunderbolt AC/DC's had inside? sounds like both copper and aluminum?

  4. #4
    Join Date
    Sep 2005
    Location
    Houston, TX
    Posts
    875

    Default

    Whether it is Aluminum or Copper or a combination, it is a tried and true machine. What bothers me more on newer machines is that the short leads are hard wired and not as easily or cheaply replaced.

  5. #5
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,473

    Default

    These units have not particularly changed over the last 40 years. originally the shunts were horizontal, then they went vertical, now they are back to horizontal.

    Unsure what all the hub bub is with Aluminum and copper anyways. Aluminum conducts WAAAAYYYY better than copper.

  6. #6
    Join Date
    Sep 2011
    Posts
    20

    Default

    Quote Originally Posted by cruizer View Post
    Unsure what all the hub bub is with Aluminum and copper anyways. Aluminum conducts WAAAAYYYY better than copper.
    Sorry, electrical resistance is lower in copper, so copper is a better conductor as far as the base metal goes. But you may be correct in that a final design using Aluminum may be better than Copper when you factor in wire gauge used, etc. for cost/weight reasons...

    So out of curiosity, what is copper and what is Al in my machine?

  7. #7
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,473

    Default

    Yes copper has a lower resistance, but Aluminum is a better conductor. different animals.

  8. #8
    Join Date
    Jul 2010
    Posts
    375

    Default

    I asked a Miller tech about this issue once and he said aluminum was actually better than copper in some respects for some components in a transformer welder (and not just cost). I can't remember why it was better...maybe different coefficients of expansion? or different increases in electrical resistivity for a given increase in temperature...? I forget...maybe a Miller tech will chime in here...

  9. #9
    Join Date
    Dec 2012
    Location
    Sweetwater, TX
    Posts
    201

    Default

    I prefer copper for the lower resistance, higher conductivity per same volume.

    Copper also makes a superior heat sink for high end flashlights.

    http://en.wikipedia.org/wiki/Electri...d_conductivity

    http://t.answers.com/answers/#!/entr...67894753557b/1

    http://www.geindustrial.com/publibra...pper%7Cgeneric

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Warning: Non-static method PhpQuickProfiler::getMicroTime() should not be called statically in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/pqp/classes/Console.php on line 77

Warning: Non-static method PhpQuickProfiler::getMicroTime() should not be called statically in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/pqp/classes/Console.php on line 77

Warning: Non-static method PhpQuickProfiler::getMicroTime() should not be called statically in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/pqp/classes/Console.php on line 77

Warning: Non-static method PhpQuickProfiler::getMicroTime() should not be called statically in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/pqp/classes/Console.php on line 77

Warning: Non-static method PhpQuickProfiler::getMicroTime() should not be called statically in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/pqp/classes/Console.php on line 77

Warning: Non-static method PhpQuickProfiler::getMicroTime() should not be called statically in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/pqp/classes/Console.php on line 77

Warning: Non-static method PhpQuickProfiler::getMicroTime() should not be called statically in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/pqp/classes/Console.php on line 77

Warning: Non-static method PhpQuickProfiler::getMicroTime() should not be called statically in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/pqp/classes/Console.php on line 77

Warning: Function split() is deprecated in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/footer.inc.php on line 62

Welding Projects

Special Offers: See the latest Miller deals and promotions.

Warning: Function split() is deprecated in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/footer.inc.php on line 137