92051350 - Tweco GC-500 Copper Ground Clamp 500A

Technical Overview of the Tweco GC-500 Ground Clamp

The Tweco GC-500 Ground Clamp (SKU: 9205-1350) is a premium-grade work clamp engineered for high-amperage welding applications. Manufactured from a specialized copper alloy, this clamp is designed to deliver maximum electrical conductivity, ensuring that the welding circuit remains efficient and stable even under heavy loads. With a current rating of 500 Amps at a 60% duty cycle, the GC-500 is suitable for demanding industrial environments where consistent performance is critical. The unit features a substantial jaw opening of approximately 2 inches (51 mm), allowing it to attach securely to a wide range of workpieces, from thick plates to structural beams.

A key technical feature of the GC-500 is its ball-point cable connection system. Unlike standard set screws that can fray wire strands or loosen over time due to thermal cycling, the ball-point design applies uniform pressure to the cable strands, maximizing the contact area and maintaining a low-resistance connection. This clamp accommodates welding cables ranging from 3/0 to 4/0 size. The mechanical design utilizes a heavy-duty spring mechanism that exerts significant clamping force. This pressure is essential not only for mechanical retention but also for penetrating surface contaminants such as light rust, mill scale, or paint, thereby establishing a solid electrical ground immediately upon contact.

The physical construction of the clamp prioritizes heat dissipation. The high copper content facilitates rapid thermal transfer, preventing the clamp from overheating during prolonged welding sessions. This thermal management extends the lifespan of both the clamp and the connected welding cable. The Tweco GC-500 is compatible with various welding processes, including MIG (GMAW), TIG (GTAW), Stick (SMAW), and Flux-Cored (FCAW) welding, making it a versatile component for any professional welding setup requiring reliable grounding up to 500 amps.