56Y45 - ESAB 56Y45 Short Back Cap for HW-12 Heliarc TIG Torch

Compact Precision for Heavy-Duty Welding

The ESAB 56Y45 Short Back Cap is a critical component designed specifically for the HW-12 series of TIG torches. In the world of industrial welding, the HW-12 (often associated with the legendary Heliarc brand) is known for its heavy-duty, water-cooled performance. However, standard back caps can often extend the length of the torch significantly, making it difficult to maneuver in tight quarters or complex pipe assemblies. This short back cap solves that problem by reducing the overall profile of the torch head, allowing the operator to access difficult-to-reach joints without compromising the performance of the torch.

Manufactured to ESAB's exacting standards, this back cap is constructed from high-temperature resistant materials that can withstand the intense radiant heat generated during high-amperage TIG welding. The cap features a brass threaded insert that ensures a smooth, secure fit into the torch body, preventing cross-threading and ensuring longevity. Integral to its design is the sealing O-ring, which provides a gas-tight seal to prevent atmospheric contamination of the shielding gas and ensures that the shielding gas flows correctly through the nozzle. A compromised back cap can lead to gas leaks, porosity in the weld, and unstable arcs, making this replacement part essential for maintaining weld quality.

Using the correct back cap is also vital for the mechanical stability of the tungsten electrode. The 56Y45 applies the necessary pressure to the collet, locking the tungsten in place at the desired stick-out length. Because it is a "short" cap, it is typically used with shorter tungsten electrodes, requiring the welder to cut their tungsten down to size. This trade-off is well worth it for the gained accessibility in confined spaces, such as inside corners, narrow pipe gaps, or automotive exhaust fabrication. Whether you are performing maintenance, repair, or production welding, having a 56Y45 in your kit ensures you are ready for any spatial challenge.

At Josef Gas, we understand that the reliability of your equipment depends on the quality of every small component. This genuine ESAB part ensures compatibility and performance, helping you maintain the high standards required in professional welding environments.