21160 - ESAB .030/.035 Knurled Drive Roll for Flux Cored Wire

Technical Overview of ESAB 21160 Serrated Drive Roll

The ESAB 21160 is a precision-engineered drive roll component designed specifically for the feeding of tubular welding wires, including flux-cored and metal-cored varieties. This unit features a dual-groove configuration, allowing it to accommodate two distinct wire diameters: .030 inches (0.8mm) and .035 inches (0.9mm). The ability to switch between these common sizes makes it a versatile component for industrial fabrication environments where wire size changes may occur based on material thickness and welding procedure specifications.

Unlike standard V-groove rolls used for solid wires, this drive roll utilizes a serrated or knurled surface texture. This design is critical for cored wires, which are structurally softer and more prone to deformation than solid wires. A smooth V-groove requires higher tension to achieve traction, which can crush the tubular wire, leading to flaking of the flux core or deformation of the wire shape (ovalization). Such deformation increases friction within the gun liner and contact tip, causing erratic feeding and arc instability. The serrated teeth of the ESAB 21160 bite gently into the wire surface, providing positive traction with significantly less down-pressure, thereby preserving the wire's structural integrity.

Manufactured from hardened steel, this OEM ESAB part is built to withstand the rigorous demands of continuous industrial welding. It ensures concentric rotation and precise alignment with the wire guide and liner, minimizing wear on downstream components. Proper selection of drive rolls is a fundamental aspect of welding machine maintenance and setup; using the ESAB 21160 ensures that your equipment operates within its optimal parameters for flux-cored applications.

Key Technical Specifications:

• Part Number: 21160
• Wire Compatibility: Flux-Cored and Metal-Cored (Tubular)
• Diameter Capacity: .030" (0.8mm) and .035" (0.9mm)
• Surface Profile: Serrated / Knurled
• Material: Hardened Steel