• Brand: Unimig
• Part Number:
  U51003 (V Groove 0.6–0.8mm wire)
  U51002 (V Groove 0.8–0.9mm wire)
  U51004 (F Groove 0.8-0.9mm)
• Groove Type: V Groove (machined for solid steel MIG wire applications)
  Compatible Wire Diameters: 0.6 mm – 0.8 mm, 0.8 mm – 0.9 mm (refer to specific part number)
• Material Construction:
  Precision-machined hardened tool steel with ground surface finish for superior wear resistance and high-torque drive retention under load
• Application Type:
  Designed specifically for feeding solid MIG wires including mild steel and stainless steel; suitable for workshop and light industrial applications requiring precise wire delivery
• Groove Type:
  Knurled / F-Groove (serrated groove machined specifically for flux-cored and self-shielded MIG wire feed applications)
  Compatible Wire Diameter: 0.8 mm – 0.9 mm
• Material Construction:
  ​Precision-machined hardened tool steel with knurled surface texture for high-traction, low-pressure feed engagement; engineered to reduce deformation of soft-cased wire during operation
• Application Type:
  Optimised for feeding flux-cored (FCAW) or gasless self-shielded MIG wire; recommended for fabrication, structural welding, or outdoor conditions where shielding gas is not used
• Drive System Compatibility:
  Compatible with UNIMIG VIPER MULTI 135 Synergic MIG Welder
  Fits OEM wire feed housing with push-feed mechanism
  Designed for single-drive motor systems with top pressure roller engagement
• Roller Dimensions:
• Outer Diameter: 25 mm
• Bore (Inner Diameter): 9 mm
• Width: ~10 mm (typical)
• Groove Profile: V-shaped with precision depth to minimise wire slippage and enhance axial alignment
• Mount Type:
  Smooth bore with keyed slot engagement for secure rotation in drive mechanism
• Feed Mechanism:
  Engineered for use with top-mounted pressure arms applying downward force onto the wire; V groove ensures consistent axial grip and reduced lateral wire movement
• Installation Method:
  Quick-swap tool-free installation compatible with VIPER MULTI 135 feeder cassette system; dual-sided drive surface allows roller reversal for extended service life

Features:

• Optimised for Solid Wire Feeding: This V groove drive roller is engineered specifically for solid MIG wire types such as mild steel and stainless steel. Its precision-machined groove ensures accurate alignment and smooth feeding of wire between 0.6mm to 0.8mm diameter.
• Tool Steel Durability: Crafted from high-grade hardened tool steel, this roller offers long-lasting wear resistance, even under constant, high-speed operation. The surface is ground to fine tolerances to minimise wear and ensure optimal traction with minimal slip.
• Precision Groove Profile: The V-shaped groove delivers maximum contact surface with solid wire while maintaining consistent tension. This promotes arc stability and reduces the risk of wire wandering or arc flicker during operation.
• Dual-Sided Drive Capability: Designed with reversible dual drive slots, this roller offers extended usability — once one side wears down, simply flip it over to use the other side before replacement is needed.
• Easy Maintenance & Installation: Designed for the UNIMIG VIPER MULTI 135 wire feed system, this roller installs quickly and securely without the need for tools, enabling efficient setup and changeover.
• Reliable Welding Performance: Accurate wire feeding plays a critical role in weld quality. This roller enhances arc control, reduces feeding errors, and supports cleaner weld starts and finishes for consistent, professional results.