T-A035CH - Bernard AccuLock S .035 Contact Tip (10-Pack) for MDX-250

Advanced Contact Tip Technology for Industrial MIG Welding

The Bernard T-A035CH AccuLock S Contact Tip represents a significant evolution in MIG welding consumable design, engineered to address common failure points in industrial environments. Specifically calibrated for .035-inch (0.9 mm) wire, this contact tip is a core component of the AccuLock S system, which is standard on Miller MDX-250 MIG guns and compatible with Bernard BTB semi-automatic guns. The defining engineering feature of this series is the "buried" design; approximately 60% of the contact tip resides within the gas diffuser. This architecture shields the tip from the intense radiant heat of the welding arc while maximizing exposure to the shielding gas flow, resulting in substantially cooler operating temperatures and extended consumable life.

Beyond thermal management, the T-A035CH focuses on mechanical precision and electrical efficiency. The tip features a long tail that concentrically aligns with the diffuser before the threads engage, ensuring perfect centering of the wire. This alignment is critical for maintaining a stable arc and reducing keyholing. The mating surfaces are tapered, creating a large contact area that ensures optimal electrical conductivity and locks the tip firmly in place to prevent loosening due to vibration. Furthermore, the coarse thread pitch is designed to speed up replacement and virtually eliminate the risk of cross-threading, a common issue that can damage gun necks in fast-paced production settings.

Operational reliability is further enhanced by the tip's tolerance for liner trim errors. The internal geometry is designed to feed wire smoothly even if the liner is not trimmed to the exact specification, reducing the frequency of burn-backs and erratic feeding. Manufactured from high-grade copper, these tips are built to withstand the rigors of heavy industrial welding applications, providing consistent performance and reducing downtime associated with frequent consumable changes.