19761 - ESAB Serrated Drive Roll Kit .035-.045 for MigMaster

Technical Overview of the ESAB 19761 Feed Roll

The ESAB 19761 is a specialized feed roll component engineered for industrial wire feeding applications, specifically within ESAB's 2-roll drive systems. This component is critical for the precise delivery of tubular welding wires, such as flux-cored (FCAW) and metal-cored (MCAW) consumables. Unlike smooth V-groove rolls designed for solid wires, this roll features a serrated (knurled) surface texture. This mechanical design increases the coefficient of friction between the drive roll and the wire surface, allowing for positive feeding traction with lower compressive force. This is essential for tubular wires, which are more susceptible to deformation and crushing under high tension than solid wires.

The roll is machined with dual grooves to accommodate two distinct wire diameters: 0.035 inches (0.9 mm) and 0.045 inches (1.2 mm). This dual-configuration capability allows operators to switch between common wire sizes simply by reversing the roll, thereby reducing inventory requirements and downtime during setup changes. Manufactured from hardened steel, the 19761 feed roll is heat-treated to resist wear from the abrasive nature of serrated feeding and the continuous friction of the welding wire. It is designed to fit specific ESAB wire feeders, including the legacy MigMaster series, ensuring correct alignment with the wire guide and liner systems.

Proper selection of drive rolls is paramount for maintaining arc stability. Slippage in the feed system results in erratic wire feed speeds, leading to burn-backs or stubbing. Conversely, excessive pressure on cored wires can distort the wire shape into an oval, causing increased friction in the gun liner and contact tip. The ESAB 19761's serrated profile mitigates these issues by providing adequate grip at lower tension settings, preserving the structural integrity of the wire while ensuring consistent delivery to the weld pool.