CGW 30146 4-1/2" X 5/8"-11 Type 27 120-Grit Z3 Zirconia Flap Disc

CGW 30146 4-1/2" x 5/8"-11 Type 27 120-Grit Zirconia Flap Disc is designed for aggressive grinding on metal surfaces. The disc combines premium zirconia alumina grain with a durable poly/cotton backing to balance stock removal with a reasonable finish, suitable for heavy-duty applications where material removal is a priority. The zirconia concentration contributes to faster material removal compared with conventional aluminum oxide grits, helping to reduce grinding time on steel workpieces when used with appropriate grinding parameters. An active grinding aid is incorporated to aid cooling and reduce heat buildup under light to moderate pressure, which can help manage workpiece temperatures during extended use.

The Type 27 profile of this flap disc is intended for conical or slightly angled grinding, providing a broader contact area for efficient material removal on flat and contoured surfaces. This particular disc is sized for 4-1/2 inches in diameter with a 5/8-11 inch thread arbor, compatible with compatible angle grinders that accept standard Type 27 discs. The 120-grit specification positions it between aggressive stock removal and a smoother finish, making it appropriate for initial rough shaping or deburring of metal components. Each package contains ten discs, which supports inventory needs for maintenance, repair, and operations environments.

When selecting a flap disc, consider grinder RPM limitations and the disc’s maximum operating speed to ensure safe use. This CGW disc is specified with a 13,300 RPM rating, which should be matched to equipment capable of sustaining that speed. For best results, use with compatible grinder tools and follow standard safety practices, including eye and hand protection and secure workholding. The information provided describes the product’s construction and intended use without extrapolating beyond the documented data.

Features:

• Premium Zirconia Alumina grain on poly/cotton backing for durability and finish
• High stock removal with cool cutting action
• Active grinding aid for reduced heat buildup
• Fastest stock removal in steel applications (as stated by product data)
• Aggressive, heavy-duty performance
• 4-1/2" diameter, 5/8-11" arbor, Type 27