CGW 41772 4-1/2" X 5/8"-11 Type 29 40-Grit XL ZPC Zirconia Flap Disc

CGW 41772 is a 4-1/2 inch diameter, 5/8-11 arbor Type 29 zirconia flap disc designed for steel finishing and material removal. The disc uses zirconia grain paired with a durable poly/cotton backing, which provides both rigidity and a finish-friendly surface. The 40-grit zirconia abrasive is intended for aggressive stock removal while still delivering a smoother finish typical of dense flap configurations, making it suitable for deburring, blending, and rust or scale removal on ferrous metals. The Type 29 shape adheres to angled grinding dynamics, helping to maintain contact with the workpiece and improve control during grinding operations. The XL designation indicates an extended coverage flap design, which can contribute to longer life between changes under demanding applications.

Understanding the construction helps explain its performance characteristics: zirconia grains are known for heat resistance and durable cutting action, and the poly/cotton backing supports consistent grinding pressure and helps resist tearing under heavy use. This combination is appropriate for steel-focused tasks where aggressive material removal is required but a controlled finish is still important. The product is supplied in boxed quantities of 10 discs, and each disc is designed to fit 5/8-11 spindles commonly found on many right-angle grinders used in fabrication, automotive, and maintenance environments.

For compatibility, verify your tool’s arbor size matches 5/8-11 and that the grinder’s RPM is appropriate for a 40-grit zirconia flap disc, as operating at or beyond nominal speeds can affect disc life and performance. This item is categorized for facility maintenance and is intended for steel applications, with reliable access to finishing options where high material removal rates and finishing control are needed in a single step.

Features:

• Zirconia grain with poly/cotton backing for durability and finish strength
• Designed for steel applications
• 4.5" diameter with 5/8-11" arbor
• Type 29 configuration for optimal grinding on angled surfaces
• 40 grit for balanced material removal and surface finish
• XL construction for extended disc life
• Maximum RPM 13300 rated for compatible machines