CGW 42365 4-1/2" X 7/8" Type 29 80-Grit XL Z3 Zirconia Flap Disc

CGW 42365 is a 4-1/2 inch diameter flap disc designed for aggressive stock removal on steel and similar metals. This Type 29 disc pairs a durable zirconia alumina grain with a poly/cotton backing, delivering a balance of material removal and surface finish. The zirconia concentration enhances cut rate, while the backing provides both strength and a workable finish under continued use. An active grinding aid is incorporated to help keep temperatures reasonable and allows for lighter pressure during grinding, which can reduce heat buildup on the workpiece and prolong disc life in demanding applications.

The 80-grit configuration is intended for heavy-duty material removal rather than finishing, making this disc suitable for tasks such as deburring, edge blending, and rapid stock removal on ferrous metals. With a 7/8 inch arbor and the 4-1/2 inch diameter, it is compatible with standard angle grinders that accept Type 29, right-face grinding wheels. Its design supports aggressive use, but users should apply appropriate feed-rate and pressure to optimize performance and prolong disc life. The specification notes a maximum operating speed of 13,300 RPM, which should be observed to ensure safety and maintain disc integrity during use.

For practical use, consider pairing with compatible guards and mounting hardware on compatible grinders, and inspect the disc for wear or damage before each use. The packaging indicates the product is sold as individual discs or in box quantities, which can influence stocking and replenishment decisions in maintenance environments. Always follow manufacturer safety data and local shop practices when selecting and applying flap discs.

Features:

• Premium Zirconia Alumina grain on poly/cotton backing
• High stock removal with cool cutting aid
• XL design for extended life in heavy-duty use
• Type 29 flare for aggressive grinding on steel
• 4-1/2" diameter, 7/8" arbor
• 80 grit for aggressive material removal
• Active grinding aid reduces heat buildup