LMD3A-10 - Miller MDX Series .035-.045 Wire Liner, 10 ft Length

Miller AccuLock MDX MIG Gun Liner LMD3A-10

The Miller LMD3A-10 is a high-performance replacement MIG gun liner engineered specifically for the MDX Series of welding guns, including the MDX-100 and MDX-250 models. Designed to accommodate wire diameters ranging from 0.035 inches to 0.045 inches, this 10-foot liner is an essential component for maintaining the integrity of the wire feed system in industrial and fabrication environments. As part of the AccuLock™ MDX™ system, this liner ensures precise alignment between the wire, the liner, and the contact tip, minimizing the risk of micro-arcing and ensuring consistent electrical conductivity.

A key technical feature of the LMD3A-10 is the integration of Miller's E-Z Feed™ technology. This design utilizes a unique profile and specialized coating process that significantly reduces the friction coefficient inside the liner. By minimizing touch points during the wire transition, the liner diminishes gun chatter and reduces the drag force required by the drive rolls. This is particularly critical when feeding softer or more difficult wires, such as stainless steel or metal-cored wires, which are prone to buckling or erratic feeding in standard liners. The reduction in friction translates to a more stable arc and higher quality weld deposits.

Maintenance of the wire feed path is crucial for robotic and manual welding operations alike. Over time, liners accumulate dust, metal shavings, and lubricant residue, which can impede wire flow. Replacing the liner with a genuine Miller LMD3A-10 restores the gun to factory specifications. The liner is constructed from durable materials designed to withstand the mechanical stresses of bending and flexing common in shop environments. Its 10-foot length is pre-measured for standard MDX gun assemblies, though final trimming may be required during installation to ensure a perfect fit against the gas diffuser or power pin, preventing gaps where wire could deform.

This product is supplied as a single unit in a bagged package. It is compatible with standard MIG welding power sources that utilize the MDX gun platform. By ensuring smooth wire delivery, the LMD3A-10 contributes to overall equipment efficiency (OEE) by reducing unscheduled downtime associated with wire feed failures. It is an OEM part, guaranteeing material quality and dimensional accuracy that aftermarket alternatives may not provide.