CGW 42311 4-1/2" X 5/8"-11 Type 27 36-Grit Z3 Zirconia Flap Disc

The CGW 42311 4-1/2" x 5/8-11 Type 27 36-Grit Z3 Zirconia Flap Disc is designed for aggressive material removal on steel with a focus on efficiency and durability. The disc uses premium zirconia alumina grain bonded to a poly/cotton backing, combining robust grinding capability with a finish that helps manage drum or wheel wear. The zirconia concentration is selected to support higher stock removal rates, making it suitable for heavy-duty applications where faster material removal is desired without excessive heat buildup.

Key construction features include the Z3 zirconia formulation and a Type 27 profile, which is optimized for flat grinding angles and access to contours on flat or slightly curved surfaces. The backing material provides a balance between rigidity and flexibility, contributing to stable grinding behavior and a consistent finish under demanding use. The part is built for steel-focused work, with an active grinding aid designed to promote cooler cutting under light pressure, helping to reduce heat-related wear and prolong disc life when used as directed.

This flap disc is sized for 4.5 inches in diameter with a 5/8-11 arbor, enabling compatibility with compatible angle grinders and standard mounting systems. The product is sold per each, with a typical package of 10 discs in a box, making it suitable for frequent use in busy maintenance or fabrication environments where regular disc changes are common. When selecting this disc, users should consider the aggressive stock-removal profile and plan for appropriate feed pressure to leverage the cooling aid while maintaining control over the grind for a consistent result.

Features:

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