62361 - PFERD POLIFAN SG A-COOL Flap Disc, 4-1/2" x 7/8", 40 Grit, Type 27, Aluminum Oxide

High-Performance Grinding for Thermally Sensitive Metals

The PFERD POLIFAN SG A-COOL Flap Disc (SKU: 62361) is a specialized abrasive tool engineered to address the specific challenges of grinding materials with poor thermal conductivity. Part of the Performance Line SG, this disc is designed for industrial applications requiring high economic efficiency and superior surface integrity. It features a 4-1/2 inch diameter with a standard 7/8 inch arbor, making it compatible with most industrial angle grinders. The abrasive material is a premium Aluminum Oxide blend enhanced with active grinding additives (A-COOL) that significantly lower the temperature in the grinding zone. This is particularly critical when working with stainless steel (INOX), where excess heat can cause oxidation, discoloration, and micro-structural changes.

A primary technical advantage of this disc is its resistance to loading. Soft, non-ferrous metals such as aluminum are notorious for clogging standard abrasives, a phenomenon known as loading, which glazes over the grit and renders the tool ineffective. The PFERD A-COOL SG incorporates a specialized top-sized coating that prevents soft metal adhesion. This ensures that the 40 grit abrasive remains exposed and active, maintaining a high stock removal rate throughout the life of the disc. The Type 27 flat profile provides the operator with optimal leverage for surface grinding and edge work.

Furthermore, the disc is constructed on a consumable fiberglass backing. Unlike plastic backings that can melt and transfer residue onto the workpiece under high thermal stress, the fiberglass backing wears down uniformly with the abrasive cloth. This feature prevents smearing and scratching, ensuring that the workpiece remains uncontaminated. By combining aggressive cutting capability with cool grinding properties and anti-loading technology, the PFERD POLIFAN SG A-COOL stands out as a robust solution for fabricating aluminum and stainless steel components.