14H-40 - Tweco Style 14H-40 Heavy Duty MIG Contact Tip .040 - 25 Pack

Heavy-Duty Precision for High-Amperage MIG Welding

The GEN14H-040 is a premium quality, heavy-duty contact tip designed to serve as a direct replacement for the Tweco 14H-40. Engineered for industrial environments, this contact tip is machined from superior copper alloy tubing, ensuring excellent electrical conductivity and thermal transfer. It is specifically sized for .040-inch (1.0 mm) welding wire, a gauge often utilized in structural and fabrication applications requiring a balance between deposition rate and control. The "H" designation indicates a heavy-duty wall thickness, providing greater mass to withstand the heat generated during welding operations up to 400 amperes.

Dimensional accuracy is critical in automated and manual welding processes. These contact tips feature an inside diameter (ID) tolerance held strictly to +/- .003 inches. This precision ensures a stable electrical contact point with the passing wire, minimizing micro-arcing inside the tip which can lead to premature failure or burn-back. The interior surface is machined smooth to reduce friction, promoting consistent wire feeding and reducing the load on wire feeder motors. The threaded base design allows for a secure mechanical connection to standard gas diffusers, such as the 52 and 52FN models, maximizing current transfer efficiency from the gun to the wire.

Identification in a busy shop environment is simplified as each tip is clearly stamped with its part number and wire diameter. This reduces the risk of installing the wrong tip size, which can cause erratic arcs or wire jamming. Sold in a convenient pack of 25, these tips provide a cost-effective solution for maintaining inventory of essential consumables for Tweco No. 2, No. 3, and No. 4 style MIG guns, as well as other compatible systems utilizing 14-series consumables.