CGW 42342 4-1/2" X 7/8" Type 27 40-Grit XL Z3 Zirconia Flap Disc

The CGW 42342 4-1/2" x 7/8" Type 27 40-Grit XL Zirconia Flap Disc is designed for aggressive material removal on metal surfaces. It pairs premium zirconia alumina grain with a durable poly/cotton backing to deliver both robust stock removal and a respectable finish. The 40-grit construction is tuned for heavy-duty grinding tasks, and the XL configuration adds extra fling-back resistance and durability, helping maintain consistent performance under demanding use. An active grinding aid is included to promote cooler cutting and reduce heat buildup when used with light to moderate pressure, which can help minimize loading and extend wheel life in continuous grinding applications.

This flap disc is intended for steel-focused work where high material removal rates are a priority, making it suitable for heavy deburring, weld smoothing, and preparation work before finishing passes. While it is optimized for aggressive use, operators should apply appropriate pressure and monitor disc wear to avoid gouging or glazing; this helps maintain the disc’s efficiency and reduces the risk of surface imperfections on the workpiece. The Type 27 profile provides a flatter contact surface for aggressive grinding on flat and contoured metal parts, and the 4-1/2" diameter with a 7/8" arbor/shank size is compatible with standard right-angle grinders used in shop and job-site environments.

Each package contains individual discs, with a typical box quantity of 10, enabling efficient inventory management for ongoing metalworking tasks. No specific mounting adapters or compatibility beyond standard 7/8" arbors are listed, so users should verify their tool’s arbor fit and ensure appropriate guards and PPE are used for wheel changes and grinding operations.

Features:

• Premium Zirconia Alumina grain on poly/cotton backing for durability and finish
• 40-grit for high stock removal on steel
• Active grinding aid provides cool cutting with light pressure
• Fastest stock removal in the marketplace for steel applications
• Suitable for aggressive use and heavy-duty applications
• Type 27 flap disc with 4-1/2" diameter and 7/8" arbor