Tweco GC-500 Copper Ground Clamp 500A

Reliable Grounding for Professional Welders

Every experienced welder knows that a bad ground is the root cause of many welding problems, from sputtering arcs and wandering puddles to hard starting and poor penetration. The Tweco GC-500 Ground Clamp is the industry standard for solving these issues. Built for serious fabrication, this 500-amp work clamp is constructed from a rugged copper alloy that does more than just grip your metal—it ensures the electricity flows exactly where it needs to go. Unlike cheap steel clamps that heat up and steal your voltage, the GC-500 acts as a highly conductive bridge, keeping your arc smooth and your machine performing at its best.

The design of the GC-500 focuses on usability and durability in the shop. The heavy-duty spring provides a bite you can trust, digging through shop grime and oxide layers to establish a solid connection instantly. The 2-inch jaw capacity is generous enough to clamp onto worktables, large pipe sections, or heavy plate without slipping. One of the standout features is the ball-point cable connection. If you've ever struggled with a ground clamp that gets hot at the cable lug or constantly works itself loose, you will appreciate this design. It secures your 3/0 or 4/0 cable firmly without crushing the strands, ensuring that the connection stays cool and tight shift after shift.

Whether you are running high-amperage flux-cored wire or precision TIG welding, a stable ground is non-negotiable. The Tweco GC-500 gives you that stability. It is designed to withstand the rough handling of a busy fabrication floor, resisting spatter adhesion and mechanical damage. By investing in a high-quality copper ground clamp like the GC-500, you are effectively eliminating one of the most common variables in welding troubleshooting. Stop fighting your arc and start welding with confidence, knowing your ground is secure, cool, and conductive.