EG300 - Lenco EG-300 Style 300A Steel Earth Clamp

Reliable Grounding for Professional Welding

The EG-300 Ground Clamp is an industry-standard solution for welders seeking a durable and reliable earth connection. Rated for 300 Amps, this clamp is engineered to handle the demands of general fabrication, maintenance, and repair work. Unlike lighter-duty clamps that may overheat or lose tension over time, the EG-300 features a robust steel construction designed to withstand the rigors of a busy workshop environment.

One of the standout features of this clamp is its 2-inch jaw opening. This generous capacity allows welders to attach the ground to a wide variety of surfaces, from thick steel plates and I-beams to pipe sections and welding tables. The versatility of the jaw design ensures that you can always find a secure grounding point, which is critical for maintaining a stable arc and achieving high-quality welds.

While the body is made of tough steel to resist deformation from drops and impacts, the electrical performance is not compromised. The clamp typically utilizes a woven copper shunt (strap) that bridges the hinge, ensuring that the welding current flows directly to the contact points without relying on the hinge pin or spring. This design minimizes resistance and heat buildup, prolonging the life of the clamp and ensuring consistent power delivery to your arc.

The heavy-duty spring mechanism provides excellent clamping pressure. A strong bite is essential for cutting through rust, scale, or paint to establish a solid electrical connection. Poor grounding is a common cause of welding issues, such as arc wandering, sputtering, and cold welds. By upgrading to a high-quality clamp like the EG-300, you eliminate these variables, allowing you to focus on your technique and the weld puddle.

Installation is straightforward, typically featuring a bolt and nut or lug connection point for your welding cable. This secure attachment method prevents the cable from pulling loose during operation. Whether you are setting up a new welding machine or replacing a worn-out clamp on your existing lead, the EG-300 offers the performance and longevity required for professional results.