CGW 39472 4-1/2" X 5/8"-11 Type 29 40-Grit XL A3 Aluminum Oxide Flap Disc

The CGW 39472 flap disc combines a 4-1/2 inch diameter with a 5/8-11 inch threaded arbor, designed for aggressive material removal on a variety of substrates. Built on a polyester backing, it uses premium Aluminum Oxide grain to deliver consistent cutting performance across ferrous and non-ferrous metals, as well as plastics and wood. The Type 29 configuration is suited for angled grinding tasks, enabling efficient material removal while maintaining control over the workpiece surface.

The disc is labeled XL, indicating extended life compared to standard sizes, and is formulated for high-temperature grinding conditions typical of metalworking and fabrication environments. With a 40-grit profile, it provides a balance between material removal rate and a finer finish compared with coarser grits. The stated RPM rating of 13,300 helps users verify compatibility with their grinders and avoid overspeed conditions that could impact performance or safety. Each package contains ten discs, suitable for sustained use in demanding shop settings.

Practical considerations include selecting the appropriate Type 29 flap disc for angled grinding and confirming the 5/8-11 arbor fits compatible tool spindles. The combination of Aluminum Oxide on a durable backing supports long-term wear in metalworking tasks, while its applicability to non-metal materials can broaden its use in mixed-material projects. For best results, check grinding parameters and workpiece material to optimize material removal rates and finish quality while observing standard PPE and machine safety practices.

Features:

• Premium Aluminum Oxide grain on a polyester backing
• 4-1/2" diameter with 5/8-11" arbor
• Type 29 flap disc for angled grinding
• 40-grit provides balanced material removal and finish
• XL construction for extended grinding life
• Suitable for ferrous and non-ferrous metals, plastics, and wood