Bosch 125 mm Aluminium Oxide Flap Disc

A flap disc is a versatile abrasive tool used in various metalworking and woodworking applications for grinding, blending, finishing, and polishing tasks. Comprising multiple overlapping abrasive flaps adhered to a central backing plate, flap discs are designed to replace traditional grinding wheels and sanding discs due to their enhanced efficiency and performance.

The construction of a flap disc typically consists of abrasive grains, such as aluminum oxide, zirconia alumina, or ceramic, bonded to a sturdy backing material like fiberglass, plastic, or metal. The abrasive flaps are angled and arranged around the central hub, allowing for smooth and consistent material removal.

One of the key advantages of flap discs is their ability to conform to irregular surfaces and contours, making them ideal for applications requiring precision and control. The flexible nature of the flaps reduces gouging and enhances surface contact, resulting in smoother finishes and reduced operator fatigue.

Flap discs come in various sizes, grits, and configurations to suit different tasks and materials. Coarser grits are suitable for heavy material removal and grinding, while finer grits excel in blending welds, surface preparation, and achieving polished finishes.

Common applications for flap discs include metal fabrication, welding, automotive repair, woodworking, and construction. They are used for removing weld splatter, smoothing rough surfaces, deburring sharp edges, shaping and refining metal and woodworkpieces, and preparing surfaces for painting or coating.