33818 - Miller 033818 Aluminum Bus Bar for Dialarc 250

Get Your Dialarc 250 Back in Action

If you are troubleshooting a Miller Dialarc 250 and have discovered a burnt, pitted, or broken connection inside the case, the Miller 033818 Aluminum Bus Bar might be exactly what you need. Welding machines vibrate, heat up, and cool down constantly; over years of service, these physical stresses can cause internal connections to loosen. Once a connection is loose, electricity arcs across the gap, eating away at the metal bus bar until the connection fails completely. This 10.38-inch aluminum bar is the factory-correct replacement to fix that specific link in your machine's power chain.

Don't try to fabricate a replacement out of random scrap metal or copper strap. The Dialarc 250 was designed with specific spacing and material properties in mind. Mixing metals (like copper and aluminum) without the right washers can lead to galvanic corrosion, and using a bar of the wrong size can cause shorts against the case or other components. This genuine Miller part drops right into place, connecting your transformer or rectifier assembly exactly as the engineers intended. It’s a quick fix that restores the full current-carrying capacity of your welder.

Installation Tips: When installing this new bus bar, take a moment to inspect the bolts and nuts you are using. If they are rusty or heat-damaged, replace them as well. Use a wire brush or abrasive pad to clean the contact points on the machine side until they are bright and shiny. A clean, tight connection is the secret to a repair that lasts another 20 years. Whether you are doing a full refurbishment on an old shop workhorse or just fixing a sudden breakdown, this bus bar is a small part that plays a huge role in your arc stability.