2200118 - Bernard Tweco #4 Style Power Pin for BTB and T-Gun Series

Technical Overview of the Bernard 2200118 Power Pin

The Bernard 2200118 Power Pin is a critical component designed to interface Bernard MIG guns with wire feeders utilizing the Tweco #4 connection standard. This power pin is engineered specifically for the Bernard BTB (Best of the Best) MIG Gun platform, which consolidates the brand's Q-Gun, S-Gun, and T-Gun series into a single, modular system. Additionally, it maintains backward compatibility with the legacy T-Gun Series, ensuring that facilities with mixed equipment vintages can standardize their inventory on this single part number.

Technically, the power pin serves three primary functions: electrical current transfer, shielding gas delivery, and welding wire guidance. The 2200118 is machined from high-grade brass alloy, selected for its superior electrical conductivity and resistance to thermal deformation. This ensures that the high amperage required for industrial MIG welding is transferred from the feeder block to the gun cable with minimal voltage drop, preventing overheating at the connection point. The pin features precision-cut threads for secure attachment to the gun's rear strain relief or cable assembly, ensuring mechanical stability during operation.

The Tweco #4 profile is one of the most common connection standards in the North American welding industry, characterized by its specific diameter and locking groove location. This power pin includes pre-installed O-rings that seal against the feeder's receptacle walls, creating a gas-tight pathway for shielding gas to enter the liner and travel to the nozzle. The internal bore is sized to accommodate standard liners used in Bernard guns, allowing for smooth wire feeding without snagging or shaving. Proper installation of this power pin is essential for maintaining the duty cycle rating of the MIG gun and ensuring weld quality.