Bernard 403-20-1.4 Tough Lock Contact Tip 1.4 Mm Copper

Product Description

The BERNARD 403-20-1.4 is a heavy-duty copper contact tip designed for MIG welding applications where consistent electrical conductivity and arc stability are critical. Built to the TOUGH LOCK standard, it features a 1.4 mm bore diameter sized for smooth wire feeding and reliable arc starts. The copper construction provides effective heat dissipation, making it suited to high-amperage, high-cycle welding environments. Licensed welding professionals and industrial fabricators install this tip as a consumable replacement on compatible Bernard MIG guns. Its precision bore and secure diffuser connection help reduce wire burn-back and minimize unplanned downtime on the job.

This contact tip is intended for heavy-duty manufacturing, structural steel fabrication, and other demanding MIG welding applications. It fits into the TOUGH LOCK system, which is engineered to maintain a firm, low-resistance connection between the tip and gas diffuser throughout extended weld cycles. Typical use cases include high-deposition wire processes where tip wear and burn-back are common failure points. Professional welders running Bernard MIG guns in production or field fabrication environments will find this tip appropriate for continuous-duty workloads.

Key Features

• 1.4 mm bore diameter for precise wire guidance and consistent arc initiation
• Heavy-duty copper construction for superior heat dissipation and extended service life
• TOUGH LOCK design provides a secure, low-resistance connection to the gas diffuser
• Reduces wire burn-back and arc instability in high-amperage welding cycles
• Designed as a consumable replacement for use in demanding industrial fabrication settings

Compatibility

Designed as an OEM-style replacement contact tip for Bernard MIG guns equipped with the TOUGH LOCK consumable system, used with 1.4 mm welding wire.

Installation Notes

Contact tips are installed and replaced by qualified welding professionals as part of routine MIG gun consumable maintenance. Always power down the welding system and allow the gun neck to cool before removing or installing contact tips. Use the appropriate tip wrench to avoid cross-threading or over-torquing the tip into the diffuser. Inspect the gas diffuser and retaining head for wear at each tip change to maintain full system performance.

Technical Specifications

• Wire Bore Diameter: 1.4 mm
• Material: Copper
• Duty Rating: Heavy-Duty
• Tip System: TOUGH LOCK

Standard Information

• Brand: BERNARD
• Manufacturer Part Number: 403-20-1.4