CGW 30142 4-1/2" X 5/8"-11 Type 27 40-Grit Z3 Zirconia Flap Disc

CGW 30142 is a 4-1/2 inch diameter, 5/8-11 threaded arbor Type 27 zirconia flap disc designed for aggressive material removal on steel. This flap wheel-style attachment uses premium zirconia alumina grain on a durable poly/cotton backing, combining high stock removal with a finish that remains workable under heavy use. The zirconia concentration is intended to sustain abrasive performance across extended grinding, while the active grinding aid helps maintain cool cutting action under light pressure, reducing heat buildup during longer grinding sessions.

The Type 27 profile provides a depressed center for grinding at slightly angled surfaces, making it suitable for contouring welds, edges, and flat areas where access is reasonable but not perfectly perpendicular. Its 40-grit size offers a balance between material removal rate and a smoother final surface relative to coarser grits. The disc is manufactured to a standard 4-1/2" diameter with a 5/8"-11 arbor, and is packaged in a way that supports multiple-use rotations, typical for shop floors performing frequent maintenance and fabrication tasks.

For best results, use with compatible grinders capable of 13300 RPM to match the disc’s performance envelope. Verify that your tool and workpiece can handle the grinding forces associated with aggressive zirconia abrasives, and follow standard safety practices, including appropriate PPE and clamping/workholding procedures. This product is listed with a box quantity of 10 discs per order, which supports bulk maintenance operations where multiple discs are required for ongoing projects.

Features:

• Premium Zirconia Alumina grain on a poly/cotton backing for durability and finish
• High stock removal with zirconia concentration
• Fastest stock removal in the marketplace for steel applications
• Recommended for aggressive use and heavy-duty grinding
• Active grinding aid for cool cutting with light pressure
• 4-1/2" diameter with 5/8-11" arbor; Type 27, 40-grit