92501114 - Tweco RG-140 Rotary Ground Device 400A

High-Performance Rotary Grounding for Industrial Fabrication

The Tweco RG-140 Roto-Ground Clamp (SKU: 92501114) is a specialized grounding device engineered to solve one of the most persistent challenges in pipe and vessel fabrication: cable management during rotation. In automated or semi-automated welding environments where workpieces—such as pipes, tanks, or pressure vessels—are mounted on turning rolls or positioners, standard ground clamps often fail. As the workpiece rotates, a static ground cable will inevitably wrap around the object, leading to cable stress, insulation damage, and potential safety hazards. The RG-140 eliminates this issue entirely by providing a highly conductive, rotating contact point that spins freely with the workpiece while maintaining a solid electrical connection to the power source.

Constructed from high-grade copper alloy, the RG-140 is designed for superior electrical conductivity and thermal management. It is rated for 400 Amps of continuous welding current, making it suitable for a wide range of industrial processes including MIG (GMAW), TIG (GTAW), and Stick (SMAW) welding. The device features a robust internal mechanism that ensures consistent contact pressure, minimizing voltage drop and preventing arc blow or unstable arcs that can result from poor grounding. This consistency is critical in high-quality code welding where arc stability directly impacts the integrity of the weld deposit.

The unit is designed for easy installation and maintenance. It can be attached to various shaft sizes found on standard positioning equipment. By utilizing the Tweco Roto-Ground, fabrication shops can significantly reduce downtime associated with untangling cables and replacing damaged leads. Furthermore, it protects the welding machine's internal components by ensuring the path of least resistance is always through the ground lead, rather than through the bearings of the positioner or other sensitive equipment. The RG-140 represents a standard of reliability in the heavy fabrication industry, combining Tweco's legacy of durability with practical engineering for rotary applications.