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  1. #1
    Join Date
    Nov 2011
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    147

    Default all copper 300A welding ground clamp

    Anyone have a good place to buy an ALL copper 300A ground clamp?

    Checked eBay, Amazon some LWS and cannot find one. Plenty of brass or partial copper cast clamps


    Trying to replace the stock clamp on 252.

    Thanks

    Eric

  2. #2
    Join Date
    Nov 2003
    Posts
    3,054

    Smile

    Quote Originally Posted by ericher69 View Post
    Anyone have a good place to buy an ALL copper 300A ground clamp?

    Checked eBay, Amazon some LWS and cannot find one. Plenty of brass or partial copper cast clamps


    Trying to replace the stock clamp on 252.

    Thanks

    Eric

    Think this is probably what you are looking for

    Tweco® Copper Ground Clamp - 300 Amp GC 300

    Genuine Tweco® Professional Copper Ground Clamp with Ball-Point Cable Connection

    Features
    Copper cast upper and lower jaws
    Insulated Spring
    Heavy Duty Spring providing the clamping force to the work surface

    Specifications Material Composition Copper Casting
    Amperage Capacity 300
    Jaw Opening Depth 4"
    Applications Light Duty Metal Fabrication
    Overall Length 8.5"
    Type Of Cable Connection Ball-Point thru 3/0
    Style Of Ground Device Clamp
    Jaw Opening 1.5" Process(es) SMAW, SAW, GMAW, FCAW, GTAW, and PAW

    Can be ordered from just about any LWS or over the internet.. from $30.00-$50.00

    here is one place

    http://store.cyberweld.com/grounclam400.html

    Last edited by H80N; 02-07-2014 at 06:05 AM.
    .

    *******************************************
    The more you know, The better you know, How little you know......

    “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

    Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

    My Blue Stuff:
    Dynasty 350DX Tigrunner
    Dynasty 200DX
    Millermatic 350P w/25ft Alumapro & 30A
    Millermatic 200

    TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam..

  3. #3
    Join Date
    Nov 2011
    Posts
    147

    Default all copper 300A welding ground clamp

    H80N

    Thanks!

    Looked at a Tweco at TSC and was brass?

    I'll give my LWS a call also

  4. #4
    Join Date
    Apr 2010
    Posts
    262

    Default

    I thought I saw something in TWECO literature about "high copper". Not all copper.
    Miller stuff:
    Dialarc 250 (1974 vintage)
    Syncrowave 250
    Spot welder (Dayton badged)

  5. #5
    Join Date
    Nov 2003
    Posts
    3,054

    Smile

    .

    *******************************************
    The more you know, The better you know, How little you know......

    “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

    Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

    My Blue Stuff:
    Dynasty 350DX Tigrunner
    Dynasty 200DX
    Millermatic 350P w/25ft Alumapro & 30A
    Millermatic 200

    TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam..

  6. #6
    Join Date
    Dec 2011
    Posts
    388

    Default

    Haha, unspecified "copper alloy" sounds like salesman-speak to me. All the brass ones are "copper alloy". I think they are good ground clamps but the copper alloy is a salesman doubletalk.---Meltedmetal

  7. #7
    Join Date
    Apr 2010
    Posts
    262

    Default

    High Copper alloy could even be Silicon Bronze, which isn't much better conductor than steel. Very high Copper content but it sucks. Some brasses are a lot better.
    Miller stuff:
    Dialarc 250 (1974 vintage)
    Syncrowave 250
    Spot welder (Dayton badged)

  8. #8
    Join Date
    Nov 2003
    Posts
    3,054

    Default

    Pure copper is not easily cast and has undesirable mechanical properties..
    (crack prone)

    so of course it would be alloyed with another metal like tin to produce a high copper alloy or bronze.. mechanically very tough and an excellent conductor
    They used to make cannons out of bronze...

    do not believe that they are a brass which is typically a copper/zinc alloy with some other metals as well..

    Here is some background

    http://www.keytometals.com/Article64.htm

    my guess is that TWECO chose a suitable alloy from a mechanical and conductivity standpoint... they have been in business for a long time and their clamps perform very well...
    I have several of them and like them a lot..

    Would I buy them again..??................. YUP ... in a Heartbeat...

    Last edited by H80N; 02-07-2014 at 03:13 PM.
    .

    *******************************************
    The more you know, The better you know, How little you know......

    “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

    Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

    My Blue Stuff:
    Dynasty 350DX Tigrunner
    Dynasty 200DX
    Millermatic 350P w/25ft Alumapro & 30A
    Millermatic 200

    TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam..

  9. #9
    Join Date
    Dec 2011
    Posts
    388

    Default

    I'm not dissing Tweco products, I think they are fine. What I'm saying is that not everything a salesman or sales team comes up with is really 100% relative. We have cast some copper in the past as anode hooks and I know it presents some challenges but I'm sure that if Tweco wanted 100% copper ground clamps they or someone else would make them. There are likely many good reasons that they use the alloy that they use but the copper reference imho is just salesmanship and doesn't really mean what the customer may be led to believe. You may infer that I don't always trust salesmen.---Meltedmetal

  10. #10
    Join Date
    Nov 2003
    Posts
    3,054

    Default

    Quote Originally Posted by Meltedmetal View Post
    I'm not dissing Tweco products, I think they are fine. What I'm saying is that not everything a salesman or sales team comes up with is really 100% relative. We have cast some copper in the past as anode hooks and I know it presents some challenges but I'm sure that if Tweco wanted 100% copper ground clamps they or someone else would make them. There are likely many good reasons that they use the alloy that they use but the copper reference imho is just salesmanship and doesn't really mean what the customer may be led to believe. You may infer that I don't always trust salesmen.---Meltedmetal
    No Argument...

    sales people always seem feel a need to exagerate... even if what they already have is excellent..
    go figure..
    Last edited by H80N; 02-07-2014 at 07:58 PM.
    .

    *******************************************
    The more you know, The better you know, How little you know......

    “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

    Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

    My Blue Stuff:
    Dynasty 350DX Tigrunner
    Dynasty 200DX
    Millermatic 350P w/25ft Alumapro & 30A
    Millermatic 200

    TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam..

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