92051217 - Tweco WS500GC 500A High-Conductivity Work Clamp

High-Performance Industrial Grounding Solution

The Tweco WS500GC (Part Number 9205-1217) is a premium-grade 500 Amp ground clamp designed to meet the rigorous demands of heavy industrial welding. As a critical component in the welding circuit, the ground clamp—often referred to as the work clamp—plays a vital role in maintaining arc stability and weld quality. The WS500GC is engineered with a high-copper alloy body, distinguishing it from lower-grade steel or stamped metal clamps. This material selection significantly enhances electrical conductivity (IACS rating), reducing resistance at the contact point and minimizing heat generation during prolonged welding operations at high amperages.

Mechanically, the WS500GC features a robust tong-style design with a heavy-duty spring mechanism. This spring exerts substantial pressure on the jaws, ensuring a bite that penetrates surface oxides or minor contaminants to establish a solid electrical connection. The jaw opening extends to approximately 2 inches, providing versatility for clamping onto various workpiece thicknesses, from sheet metal to heavy structural beams. The clamp is rated for 500 Amps at a 60% duty cycle, making it suitable for high-output MIG, TIG, and Stick welding processes found in shipyards, fabrication shops, and construction sites.

A standout feature of the Tweco WS-series is the ball-point cable connection system. Unlike standard set screws that can shear off fine copper cable strands when tightened, the ball-point design applies pressure evenly, preserving the integrity of the welding cable while maximizing the contact surface area for current transfer. This clamp is optimized for use with 3/0 and 4/0 welding cables, ensuring that the entire secondary circuit is capable of handling heavy current loads without bottlenecks. The ergonomic design of the handles allows for easy one-handed operation, providing sufficient leverage to open the strong spring without excessive operator fatigue.

In summary, the Tweco WS500GC represents a convergence of durable mechanical engineering and efficient electrical design. It addresses common failure points in welding circuits—such as overheating clamps and frayed cable connections—providing a reliable, long-lasting solution for professional welders requiring consistent performance.