all copper 300A welding ground clamp

[ericher69]

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

[H80N]

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

[ericher69]

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

[USMCPOP]

I thought I saw something in TWECO literature about "high copper". Not all copper.

[H80N]

Here is the Lit...

http://victortechnologies.com/tweco/products/detailProduct.html?prodID=92051130

[Meltedmetal]

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

[USMCPOP]

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.

[H80N]

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...

[Meltedmetal]

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

[H80N]

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..

[Stubs]

Aronson wrote a lot about grounds. He had a very useful weld on mercury conductor for his positioners. Contact area makes more impact than conductor material.

I have an old vice grip with copper pipe jaw and sweated on cable in addition to standard clamp.

[griff01]

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

An all (100%) copper clamp would be a good conductor but it wouldn't be much of a clamp.

Griff

[H80N]

FWIW... I have used bronze tools, wrenches, pliers, hammers.. etc..

while working on radars where nonmagnetic tools were required because the magnetic field from the magnetron would rip steel tools from your hands...

the bronze tools are plenty tough..