Miller EG500 500A Steel Ground Welding Clamp

The Miller EG500 is a 500-amp-rated steel ground clamp built for professional welding environments where ground connection quality directly affects arc stability and weld quality. With a 2-inch jaw opening, it seats cleanly on flat plate, angle iron, channel stock, and welding table surfaces — the surfaces where you actually need a ground, not just theoretically. The all-steel body is the key spec here: it doesn't crack under thermal cycling, the jaw spring doesn't fatigue after a few hundred uses, and the contact surfaces stay flat enough to maintain low electrical resistance over time. That matters more than most welders realize until a flimsy clamp starts intermittent-grounding mid-bead.

Setup is exactly as it should be — clamp it to your work or table, attach your ground lead, weld. No break-in, no adjustments. The 1.1-pound weight and 6-inch length are denser than you'd expect for the size, a direct result of the all-steel build. That's a trade-off: the clamp will outlast cheap aluminum alternatives by years, but it's not the right choice if you're on foot constantly moving between fixtures. For a fixed shop station or a truck-based welding rig, the EG500 is the kind of component you buy once and forget about — which is exactly what a ground clamp should be.