CGW 42325 4-1/2" X 7/8" Type 29 80-Grit Z3 Zirconia Flap Disc

The CGW 42325 is a 4-1/2 inch diameter, 7/8 inch arbor Type 29 zirconia flap disc designed for aggressive stock removal on steel surfaces. It combines premium zirconia alumina grain with a poly/cotton backing, delivering a balance of durability and finishing capability while maintaining efficient material removal. The zirconia concentration contributes to rapid grinding, which is notable for demanding metalworking tasks where higher stock removal rates are needed.

This flap disc features an 80-grit formulation, which provides a coarse finish suitable for heavy-duty deburring, blending, and rapid material removal. An active grinding aid is included to help maintain cooler cutting action under light pressure, potentially reducing heat buildup during extended grinding sessions. The disc is labeled for a 4.5" diameter with a 7/8" arbor, and is listed with a maximum RPM of 13,300, aligning with standard safety practices for high-speed grinding tools when used with compatible machines.

Practical use of this disc centers on metal fabrication and maintenance applications where aggressive removal is required but a consistent finish is still achievable. When selecting a flap disc, verify compatibility with your grinder’s arbor size and the machine’s RPM to ensure safe operation. The packaging specifies individual discs with a box quantity of 10, suitable for stocking and repeat use in busy workshop environments. This product data does not specify additional certifications or country of origin, so users should consult the manufacturer or supplier for any compliance details beyond the technical specifications provided.

Features:

• Premium zirconia alumina grain on a poly/cotton backing for durability and finish
• High stock removal with cool cutting due to active grinding aid
• Fastest stock removal in the marketplace for steel applications
• Type 29 flap disc for versatile grinding angles
• Optimized 80-grit configuration for aggressive yet controllable material removal
• 4-1/2" diameter, 7/8" arbor/shank, suited for standard grinders