Tweco WS500GC 500A High-Conductivity Work Clamp

Don't Let a Bad Ground Ruin Your Weld

We’ve all been there: you strike an arc, and it sputters, wanders, or cuts out completely. You check your settings, check your wire, and finally, you look down at your ground clamp only to see it smoking hot or barely hanging on. A poor ground is the number one cause of welding frustration, and the Tweco WS500GC 500 Amp Copper Ground Clamp is the ultimate cure. This isn't a cheap, stamped-steel clamp that you pick up at a hardware store; this is a heavy-duty, professional-grade work clamp built by Tweco, a brand synonymous with quality in the welding industry.

The first thing you'll notice about the WS500GC is the weight and the build quality. It is cast from a high-copper alloy, which means it conducts electricity far better than steel clamps. Better conductivity means less resistance, and less resistance means the clamp stays cooler, even when you are pushing 500 amps. The jaws are designed to bite down hard. Thanks to a powerful spring, this clamp grabs onto your workpiece and doesn't let go, ensuring that your voltage stays constant and your arc stays smooth. Whether you are welding on a bench or out in the field, knowing your ground is secure lets you focus entirely on the puddle.

One of the best features for the daily user is the cable connection. Tweco uses a ball-point screw design that is vastly superior to a standard lug or direct screw. When you tighten it down on your 3/0 or 4/0 cable, the ball point presses firmly without grinding and snapping the copper strands of your expensive welding lead. This means your cable lasts longer and maintains a better connection over time. The clamp opens up to 2 inches, giving you plenty of room to attach to tables, beams, or parts.

Upgrade your setup with the Tweco WS500GC. It’s an investment in consistency. Stop fighting your equipment and start welding with the confidence that your circuit is solid from the machine to the arc and back again. Perfect for stick, MIG, and flux-cored welding where high heat and high amps are the name of the game.