19165 - ESAB ST-23A Replacement Insulator and Wire Guide

Restore Precision to Your ST-23A MIG Gun

The ESAB 19165 Insulator Wire Guide is a critical replacement component designed specifically for the legendary ST-23A MIG welding gun. For professional fabricators and industrial welders who rely on the durability of the ST-23A platform, maintaining the internal components of the torch is essential for consistent performance. This specific part serves a dual purpose: it acts as an electrical insulator to prevent short-circuiting within the gun head, and it functions as a guide to ensure the welding wire feeds smoothly towards the contact tip.

Over time, the intense heat and harsh environment of industrial welding can degrade internal torch components. An insulator that has become cracked, charred, or worn can lead to erratic arc starts, unstable welding parameters, or even dangerous electrical shorts that damage the nozzle or the workpiece. Furthermore, if the wire guide portion of this component wears a groove, it can cause increased friction on the wire, leading to feeding issues such as birdnesting or stuttering at the arc. Replacing the 19165 Insulator Wire Guide is a simple yet effective maintenance step that restores the mechanical and electrical integrity of your welding gun.

Key Features and Benefits

This genuine-style replacement part is manufactured to precise tolerances to ensure a perfect fit within the ST-23A handle and head assembly. Its heat-resistant composite material is engineered to withstand the thermal cycling inherent in high-amperage welding applications. By ensuring the wire is centered and the electrical path is isolated, this insulator helps produce high-quality welds with minimal downtime.

• Exact Fitment: Designed exclusively for the ST-23A model, ensuring hassle-free installation.


• Electrical Safety: Provides a robust barrier against unwanted arcing and shorts.


• Smooth Feeding: Reduces drag on the welding wire for a consistent burn-off rate.


• Durability: Constructed from materials capable of enduring high heat and spatter exposure.

Whether you are refurbishing an older L-Tec/ESAB unit or performing routine maintenance on your shop's daily drivers, the ESAB 19165 is the correct part to keep your equipment running at peak efficiency. Don't let a small, worn-out component compromise your weld quality; invest in the proper replacement parts to keep your ST-23A performing like new.