Tweco 300A Copper Flat Tong Ground Clamp

Reliable Earth Connection for Stable Arcs

Every welder knows that a good weld starts with a good ground. If your earth clamp is worn out, overheating, or making poor contact, you are going to struggle with arc instability, sputtering, and inconsistent bead profiles. The Tweco 300Amp Copper Ground Clamp is built to solve these problems and provide a rock-solid foundation for your welding circuit. Whether you are fabricating structural steel, repairing heavy equipment, or working on general shop projects, this clamp delivers the current transfer you need to keep your focus on the puddle, not on troubleshooting your machine settings.

Built for the Shop Floor
This clamp isn't a flimsy stamped-steel accessory; it features solid copper cast jaws. Copper is the gold standard for ground clamps because it conducts electricity far better than steel, meaning the clamp stays cooler and your voltage drop is minimized. The "Flat Tong" style is a favorite among fabricators working with plate steel and flat bar. The wide, flat jaws slide easily onto the edge of your workpiece or welding table and bite down hard, thanks to a powerful heavy-duty spring. This ensures that once you clamp it on, it stays put, providing a consistent electrical path that helps prevent arc blow.

Easy Installation and Maintenance
Setting up this ground clamp is straightforward. It utilizes a ball-point screw to secure your welding cable. This is a huge advantage when you need to replace a clamp in the field or swap cables between machines. You simply strip your cable, insert it, and tighten the screw. The ball-point tip ensures the cable strands are compressed firmly without being cut, creating a high-quality connection that won't wiggle loose. The spring is also insulated, which adds a layer of safety and longevity to the tool by ensuring the current flows through the copper jaws where it belongs, rather than heating up the spring. Upgrade your lead set with this professional-grade clamp and experience the difference a solid ground makes.