CGW 42372 4-1/2" X 5/8"-11 Type 29 40-Grit XL Z3 Zirconia Flap Disc

CGW 42372 is a 4-1/2 inch diameter zirconia flap disc designed for aggressive stock removal on steel and similar materials. The disc uses premium zirconia alumina grains bonded to a durable poly/cotton backing, combining flexible support with robust grain for efficient material removal and a quality finish. The 40-grit formulation emphasizes rapid material removal while maintaining controllable abrasion, making it suitable for heavy-duty grinding tasks in fabrication, maintenance, and repair environments. A notable feature is the active grinding aid, which helps keep cutting temperatures lower under light pressure, contributing to reduced heat buildup during extended grinding sessions.

This Type 29 flap disc is built for continuous use in demanding grinding applications. The zirconia grain composition provides enhanced wear resistance and higher stock removal rates compared to standard alumina blends, which helps teams complete grinding work more quickly while managing tool wear. The disc is intended for aggressive use and heavy-duty applications, aligning with shop floor needs where durable performance and consistent disc life are important. Practical considerations include the need to apply steady, light pressure to maximize the benefits of the grinding aid and to monitor heat generation during extended use to prevent glazing or loading of the abrasive surface.

Compatibility and packaging details indicate the disc is sized for 4-1/2" wheels with a 5/8"-11 threaded arbor, Type 29 configuration, and 40 grit. For ordering and inventory planning, the package size is listed as Each with a Box Quantity of 10. This combination supports standard grinder tools used in metal fabrication, metal finishing, and maintenance environments where high stock removal and a durable finish are required.

Features:

• Premium Zirconia Alumina grain on poly/cotton backing for durability and finish
• High stock removal due to zirconia concentration
• Fastest stock removal in the marketplace for steel applications
• Recommended for aggressive use and heavy-duty grinding
• Active grinding aid for cool cutting with light pressure
• 4-1/2" diameter, 5/8-11" arbor, Type 29