CGW 42162 4" X 5/8" Type 29 40-Grit XL Z3 Zirconia Flap Disc

CGW 42162 is a 4-inch diameter, 5/8-inch-11 arbor Type 29 zirconia flap disc designed for aggressive stock removal on steel and related metals. It combines premium zirconia alumina grain with a durable poly/cotton backing, delivering both long service life and a favorable finish. The zirconia concentration provides efficient material removal, while the active grinding aid supports cooler cutting action under light to moderate pressure, helping reduce heat buildup during heavy-duty grinding tasks.

This flap disc features a Type 29 profile, which is commonly used for grinding at flatter angles to the workpiece, promoting a more aggressive cut with improved accessibility in contoured areas. The 40-grit specification indicates a coarser abrasive texture suitable for rapid material removal on rough surfaces or heavily scaled metal, making it well-suited for deburring, weld blending, and initial contouring where stock removal is prioritized over a fine finish. The product is manufactured for high RPM operation, with a rated speed of 15,300 RPM, enabling efficient processing in compatible grinding setups.

When selecting this disc, ensure compatibility with 4-inch wheels and the 5/8-11 arbor size on standard angle grinders or compatible tools. Each package contains ten discs, allowing for multiple uses across a project or job site. Proper mounting and control of feed pressure are important to maximize the grinding efficiency and to minimize heat and edge loading, particularly when working on steel materials. Verification under your own process parameters and equipment is recommended to confirm suitability for specific applications.

Features:

• Premium Zirconia Alumina grain on a poly/cotton backing for durability and finish
• High stock removal with zirconia concentration
• Fastest stock removal in marketplace for steel applications
• Active grinding aid for cool cutting under light pressure
• Type 29 configuration for a smooth grind on contoured surfaces
• 4" diameter, 5/8-11 arbor