999322 - ESAB 3/64" U-Groove Drive Roll Kit (1.5" OD)

Precision Wire Feeding for Aluminum Applications

The ESAB Feed Roll Kit 1-1/2 U 3/64 (Part Number: 999322) is a specialized component engineered to optimize the performance of ESAB wire feeding systems when working with soft alloys. In the realm of Gas Metal Arc Welding (GMAW), particularly with aluminum, the interface between the drive system and the consumable wire is the most critical factor in maintaining arc stability. This kit features drive rolls with a 1-1/2 inch outer diameter, specifically machined with a U-Groove profile to accommodate 3/64-inch (1.2mm) welding wire.

The Importance of U-Groove Geometry

Unlike standard V-groove rolls designed for hard steel wires, U-groove rolls are essential for aluminum and other soft materials. A V-groove tends to bite into the wire to generate traction, which can deform aluminum wire, changing its cross-sectional shape from round to oval. This deformation increases friction inside the gun liner and contact tip, leading to erratic feeding, burn-back, and arc instability. The ESAB 999322 kit utilizes a smooth U-shaped channel that cradles the wire, providing sufficient traction through surface area contact rather than biting pressure. This ensures the wire remains round and feeds smoothly through the entire torch assembly.

Genuine ESAB Engineering

Using genuine OEM parts like the 999322 kit ensures perfect concentricity and balance within the wire feeder mechanism. Poorly machined aftermarket rolls can introduce vibration or inconsistent feed speeds, which directly translate to defects in the weld bead. This kit is manufactured to tight tolerances, ensuring that the alignment between the wire guide, the rolls, and the gun receiver is precise. For industrial environments where downtime must be minimized, relying on authentic ESAB components guarantees that your equipment operates within its specified parameters, delivering high-quality welds shift after shift.

Application and Compatibility

This feed roll kit is designed for specific ESAB wire feeders requiring 1-1/2 inch diameter rolls. It is the standard configuration for welders transitioning to or maintaining setups for 3/64" aluminum wire. Proper installation involves ensuring the rolls are keyed correctly to the drive shaft and that the tension arm is adjusted to the minimum pressure required to feed the wire without slipping, further protecting the soft aluminum from deformation.