If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.
I have an older version of that one but it won't open past 1 inch, so I ruled it out.
I'll get the type from Cyberweld.
I don't see any at my LWS.
ligito: If you wish to replace it, consider a good 200 amp brass, or steel. Something not too cumbersome, as you'll be handling it a lot.
Welding ground clamps don't open very far, as their spring pressure and design insures an effective "bite" on the material. I wouldn't be changing out for "cheapo battery charger" clamps though, consider a 12V battery compared to a 23.5 V MIG machine with a 150 amp output.
Those are good clamps. However I think it would be a little overkill for that size of a welder. On those clamps, it takes two hands to open them. I just look around before try to open it, to make sure no one sees me straining and struggling to put the clamp on the work piece.
Don't waste a lot of time fussing over the size of the work lead (ground) clamp, or even the spring pressure - I am sure for the size of the machine it will do fine...
The secret to having any work lead (ground) clamp to work effectively, is to have it attached to a CLEAN surface.
If you weld for any amount, and cannot hold your bare hand on the work lead clamp, then you have poor contact, and are losing welding energy that is being converted to heat.
Now, if you are looking for a cheap alternative to your current work lead clamp, look around for an old set of Vice Grips that have lost some of the "bite" in the jaws - Weld a bolt on the back of the pliers, attach to your welder, and you are done.
Just remember, you still need to have the area CLEAN where you attach it.
I have complained time after time on this site that Miller makes the best welder in the world with the cheapest, cheesyist ground clamp they can possibly use. If you use the ground supplied with any of their welders, you will experience overheating and even melting of the lead. Miller grounds are crap! Every time I buy a new Miller machine I automatically figure in the cost of replacing the ground.
If I have to weld on 2 inch tubing and the end of the tube is not accessible, I would need it to open more than 2 inches, to clamp around the tube.
Size the clamp to suit the largest work you're going to do?
No, you can clamp a pair of vise grip #11's (especially if they have a small piece of angle iron tacked to one jaw), a c-clamp, anything that will fasten snugly to the tube. Then clamp your ground to that.
Some days you eat the bear. And some days the bear eats you.