44.0350.0337 - Fronius Style Medium Back Cap L64 for TTG and TTW Series Torches

Precision Component for Fronius TIG Systems

The Fronius Medium Back Cap (L64), part number 44.0350.0337, is a critical consumable designed to maintain the performance and integrity of your Fronius TIG welding torch. Engineered to exact specifications, this back cap ensures a proper seal at the rear of the torch head, preventing gas leakage that could compromise weld quality through porosity or oxidation. It is specifically manufactured to fit a range of Fronius torch models, including the portable Accupocket 1600, as well as the TTG1200A, TTG2200A, TTW2500A, and TTW3000A series.

In TIG welding, the back cap serves two primary functions: it applies pressure to the collet to lock the tungsten electrode in place, and it seals the back of the torch to maintain the shielding gas shield. The "Medium" sizing (L64) of this cap is particularly popular among professional fabricators because it offers a strategic advantage. Unlike long caps that can be cumbersome in tight spaces, or short caps that require cutting tungsten electrodes down significantly, the medium cap allows for the use of reasonably long tungsten pieces while keeping the overall torch profile compact enough for most standard applications.

Constructed from durable, heat-resistant materials, this cap is built to withstand the thermal cycling and mechanical stress typical of industrial welding environments. The threaded connection is precision-machined to prevent cross-threading and ensure a secure fit every time. Whether you are operating a water-cooled TTW system for heavy-duty cycle work or a gas-cooled TTG torch for lighter fabrication, this component is essential for consistent arc stability and gas coverage. Maintaining a stock of spare back caps is recommended to prevent downtime caused by accidental drops or thread wear.

By choosing the correct back cap for your Fronius system, you ensure that your equipment operates at peak efficiency. This part is a direct replacement, ensuring that there is no guesswork involved in maintenance. It integrates seamlessly with the existing collet and torch body architecture of the specified Fronius models.