CGW 42352 4-1/2" X 5/8"-11 Type 27 40-Grit XL Z3 Zirconia Flap Disc

The CGW 42352 is a 4-1/2 inch diameter zirconia flap disc designed for aggressive material removal on steel. It uses premium zirconia alumina grain on a poly/cotton backing, which provides a durable abrasive surface and a prepared finish while maintaining flexibility for contouring work. The zirconia concentration is selected to deliver higher stock removal rates, making it suitable for heavy-duty grinding tasks where efficiency matters. An active grinding aid is included to promote cooler cutting with light pressure, helping to manage heat buildup and extend disc life under demanding use.

This Type 27 flap disc features a 5/8-11 arbor and a 40-grit size to balance material removal with a smoother finish on flat or slightly curved workpieces. The Xtra-long (XL) construction is intended to provide extended life in continuous-use scenarios, which is beneficial for shops performing repetitive grinding on ferrous metals. The disc is intended for use on right-angle grinders and should be paired with appropriate safety practices, including PPE and grinding parameters suitable for the material being worked.

Practical considerations include ensuring correct mounting to a compatible grinder, verifying RPM compatibility (the disc is rated for up to 13,300 RPM), and selecting the appropriate size and grit for the job at hand. This product is sold in box quantities of 10 per package, with each disc sized for 4-1/2 inches diameter, and 5/8-11 mounting threading to fit standard grinders. Users should maintain proper inspection routines and replace discs when wear or damage is evident to maintain performance and safety.

Features:

• Premium Zirconia Alumina grain on poly/cotton backing
• High stock removal for steel applications
• Type 27 flap disc with 40 grit for aggressive material removal
• Active grinding aid for cooler cutting with light pressure
• XL construction designed for heavy-duty use
• 4-1/2" diameter with 5/8-11" arbor