000068B - Miller 000068B M-Series .035 Contact Tip (100 Pack)

Precision Current Transfer for M-Series MIG Guns

The contact tip is the final point of electrical transfer in the MIG welding circuit, making it one of the most critical components for arc stability. The Miller 000068B .035 Contact Tip (100 Pack) is engineered to deliver superior electrical conductivity and wear resistance for professional welders. Manufactured to strict tolerances, these tips are designed to accommodate .035-inch (0.9 mm) welding wire with optimal clearance, ensuring smooth wire feeding while maintaining the constant electrical contact necessary for a crisp, consistent arc.

Technical Specifications and Performance

Constructed from a high-grade copper alloy, Miller 000068 tips are built to withstand the intense heat of the welding arc without softening or deforming prematurely. The bore geometry is critical; if the bore is too tight, it causes drag and feeding issues, while a bore that is too loose results in micro-arcing inside the tip. Micro-arcing degrades the contact surface, leading to voltage fluctuations and an erratic arc. Miller's precision manufacturing ensures the perfect balance, providing reliable current transfer that helps maintain a stable voltage and reduces spatter.

Optimized for Miller and Hobart Systems

These contact tips are the standard replacement part for a wide range of MIG guns, specifically:

• Miller M-Series: M-100, M-150, M-25, and M-40 guns.
• Hobart H-Series: H-9, H-10, and other H-series models.

The threaded base ensures a secure mechanical and electrical connection to the gas diffuser, minimizing resistance and heat buildup at the joint. This is particularly important during long welds where thermal expansion can loosen inferior components.

Maintenance and Troubleshooting

In a production environment, contact tips are a consumable item that requires regular monitoring. As the wire passes through the tip, mechanical wear eventually elongates the bore into an oval shape ("keyholing"), which compromises the electrical connection. Having the 000068B bulk pack on hand allows operators to replace tips immediately upon detecting arc instability, rather than trying to extend the life of a failed component. This proactive maintenance approach results in higher quality welds, less rework, and improved overall productivity. This bulk pack is an essential inventory item for any shop running Millermatic or Hobart Handler power sources.