11401303 - Tweco 14T-40 Contact Tip for 0.040" Wire (25-Pack)

Technical Specification: Tweco 14T-40 Contact Tip

The Tweco 1140-1303 (Model 14T-40) is a standard-duty contact tip specifically engineered for Gas Metal Arc Welding (GMAW) applications utilizing 0.040-inch (1.0 mm) wire electrodes. As a fundamental component of the MIG gun front-end assembly, this contact tip plays a pivotal role in the transfer of welding current to the electrode wire. It is manufactured from a premium copper alloy, selected for its superior electrical conductivity and thermal dissipation properties. This material composition helps to mitigate the effects of resistive heating at the contact point, thereby extending the service life of the tip and maintaining a stable arc characteristic throughout the welding process.

Part of the widely utilized Tweco 14 Series, this contact tip features a standardized 1/4"-28 UNF threaded base. This thread specification ensures compatibility with a broad range of gas diffusers, including the Tweco 52, 52FN, and 54 series, providing a secure mechanical and electrical interface. The tip's internal bore is precision-drilled to tight tolerances to accommodate the 0.040" wire diameter. This precision is critical; a bore that is too tight can cause wire feeding issues and bird-nesting, while a bore that is too loose can result in intermittent electrical contact and micro-arcing inside the tip. The 14T-40 strikes the optimal balance, ensuring smooth wire feedability while maximizing the contact area for current transfer.

The 1140-1303 is designed to fit Tweco #2, #3, and #4 MIG guns, as well as numerous third-party guns that adhere to the Tweco-style consumable platform. This cross-compatibility makes it an essential inventory item for fabrication shops utilizing mixed equipment fleets. The tips are supplied in a package of 25, a quantity designed to support continuous production environments where minimizing downtime for consumable replenishment is a key operational metric. By maintaining a fresh contact tip, operators can ensure consistent voltage parameters and reduce the incidence of weld defects associated with worn or ovalized tip bores.

In industrial settings, the contact tip is often the first point of failure in the welding circuit due to its proximity to the arc and the mechanical wear of the feeding wire. The Tweco 14T-40 is engineered to withstand these harsh conditions, offering a reliable solution for general fabrication, structural steel, and manufacturing applications. Its robust design and precise manufacturing standards ensure that it meets the rigorous demands of professional welding operations.