040205 - Miller TT-9-12 12-Inch Extension Tongs for MSW/LMSW Spot Welders

Miller TT-9-12 Standard Tongs (12-Inch Reach)

The Miller 040205 TT-9-12 Tongs are a specialized accessory designed to expand the operational capabilities of Miller's portable resistance spot welding machines. Engineered for the MSW and LMSW series (including MSW-41, MSW-41T, LMSW-52, and LMSW-52T), these tongs replace the standard shorter arms to provide a 12-inch (305 mm) throat depth. This extension is critical for fabrication tasks requiring welds located further inward from the edge of sheet metal panels, ductwork, or enclosures.

Constructed from a premium copper alloy, these tongs are designed to withstand the high thermal and electrical stresses inherent in resistance welding. The material ensures minimal resistance loss, delivering maximum current to the weld point for consistent nugget formation. The structural rigidity of the arms prevents deflection under the clamping pressure applied by the spot welder's lever mechanism, ensuring that the electrode tips remain perfectly aligned during the weld cycle. Proper alignment is essential for preventing tip skid and ensuring uniform pressure distribution.

This set includes both the upper and lower tongs, sold as a pair to maintain the correct machine geometry. Installation is straightforward, allowing operators to swap between different tong lengths (such as 6-inch, 12-inch, or 18-inch) depending on the specific requirements of the job. These are standard-type tongs, suitable for general-purpose flat sheet metal welding. Users should ensure they are using the appropriate tips (standard or flat) compatible with the tong threading to achieve optimal results.