92051150 - Tweco GC-500 Senior Copper Work Clamp 500A

High-Conductivity 500A Grounding Solution

The Tweco GC-500 Copper Ground Clamp (SKU: 9205-1150) is a premier grounding device engineered for manual arc welding processes requiring up to 500 amperes. Manufactured from a specialized copper alloy, this clamp is designed to optimize electrical conductivity while providing the mechanical durability needed in harsh industrial environments. The material composition ensures low electrical resistance at the contact interface, which is critical for maintaining consistent voltage at the arc and preventing the overheating of the grounding component itself during high-amperage operations.

Technically, the GC-500 utilizes a "Senior" style form factor, featuring a substantial 2-inch (51 mm) jaw opening and a jaw depth of 1-3/4 inches. This geometry allows the clamp to securely attach to a diverse range of workpiece configurations, including large diameter pipes, structural beams, and thick plates. The clamping force is generated by a heavy-duty spring that exerts continuous pressure, ensuring a stable, low-resistance contact patch that minimizes the risk of arc blow and voltage fluctuations. The unit is designed to facilitate efficient heat dissipation, prolonging the service life of the clamp under duty cycles typical of medium to heavy fabrication.

For cable termination, the GC-500 employs a ball-point cable connection system. This mechanism accepts welding cables ranging from smaller gauges up to 4/0 size. The ball-point screw applies direct pressure to the cable strands, creating a solid mechanical and electrical bond without the need for crimped lugs. With an overall length of 10 inches, the clamp provides sufficient leverage for easy operation while remaining compact enough for versatile positioning. This component is an essential accessory for ensuring the integrity of the welding circuit in professional applications.