11101304 - Tweco 11T-45 Contact Tip 0.045 (Pack of 25)

Precision Tweco 11 Series Contact Tips for 0.045" Wire

The Tweco 11T-45 (Part Number 1110-1304) is a standard copper contact tip designed specifically for use with 0.045-inch (1.2mm) welding wire. As part of the widely used 11 Series, these contact tips are engineered to fit Tweco #1 and Mini-MIG guns, as well as various other MIG torches that utilize the 11 Series consumable platform. This package contains 25 individual contact tips, providing a substantial supply for fabrication shops, automotive repair centers, and hobbyists who demand consistent performance and minimal downtime.

Manufactured from a high-quality copper alloy, the 11T-45 tip offers excellent electrical conductivity and thermal transfer properties. The tip features a standard 1/4"-28 UNF thread, ensuring a tight and secure fit into the gas diffuser, which is critical for preventing gas leaks and maintaining electrical continuity. The overall length of the tip is 1.0 inch (25.4mm) with an outside diameter of 0.250 inches (6.35mm), making it a compact solution ideal for light-to-medium duty welding applications where maneuverability is key.

The internal bore is precision-drilled to a nominal diameter of 0.054 inches, providing the optimal clearance for 0.045-inch solid or flux-cored wires. This tolerance is crucial; it allows the wire to feed smoothly without snagging while maintaining sufficient contact with the tip wall to transfer the welding current effectively. Proper contact is essential for arc stability and preventing issues such as micro-arcing within the tip, which can lead to premature failure and burnback.

Regular replacement of contact tips is a necessary part of MIG welding maintenance. Over time, the bore of the tip can become oval-shaped due to the friction of the feeding wire and the heat of the arc, leading to an unstable wandering arc. By stocking the Tweco 11T-45 in a 25-pack, operators can ensure they always have a fresh tip on hand to maintain weld quality. These tips are compatible with a broad range of welding machines that utilize Tweco-style back ends and front-end consumables, making them a versatile addition to any welder's inventory.