67339 - PFERD POLIFAN-CURVE 4-1/2" Flap Disc 40 Grit Zirconia Large Radius

Ultimate Economic Efficiency in Fillet Weld Grinding

The PFERD POLIFAN-CURVE is a revolution in flap disc technology, specifically engineered for the demanding task of working on fillet welds. Part of PFERD's Special Line SGP, this tool represents the pinnacle of performance for professional fabricators who require both speed and precision. Unlike conventional flap discs that only utilize the bottom face of the abrasive, the POLIFAN-CURVE features a patented radial configuration. This unique design extends the abrasive flaps up and around the edge of the disc, creating a specialized curve that perfectly matches fillet weld geometries.

For industrial MRO and fabrication environments, this means significantly reduced processing time and consumable waste. The "Large Radius" profile of this 40-grit disc is optimized for precise grinding out of fillet welds, ensuring that the weld geometry is maintained without digging into the base material or damaging the workpiece. The abrasive composition is a high-performance blend of Zirconia and Aluminum Oxide, selected to provide aggressive stock removal rates on both Steel and Stainless Steel (INOX) while resisting glazing.

The structural integrity of the disc is supported by a consumable fiberglass backing. This backing wears down simultaneously with the abrasive, preventing the risk of melting, smearing, or scratching the workpiece—a common issue with plastic-backed alternatives. Furthermore, the radial shape allows for unmatched versatility. Operators can use the POLIFAN-CURVE as a standard flap disc for surface grinding, or employ it for complex underhand applications using the top surface of the disc. This multi-functionality reduces the need for tool changes and inventory diversity, making the PFERD 67339 an essential asset for high-throughput welding operations.