CGW 42312 4-1/2" X 5/8"-11 Type 27 40-Grit Z3 Zirconia Flap Disc

The CGW 42312 flap disc is a 4-1/2 inch, 5/8-11 hub with Type 27 configuration designed for aggressive grinding on steel surfaces. Constructed with premium zirconia alumina grain on a poly/cotton backing, this disc blends durability with a smoother finish while delivering high stock removal thanks to its zirconia concentration. An active grinding aid is included to promote cooler cutting when operated with light to moderate pressure, which can help reduce heat buildup during extended grinding sessions.

This disc is intended for heavy-duty, high-demand applications where fast material removal is a priority. The combination of zirconia grit and a durable backing supports efficient material removal across a range of steel grades, making it suitable for aggressive prep work, deburring, and contouring tasks. The Type 27 profile is optimized for angle grinder use on flat or slightly contoured surfaces, enabling effective grinding and finishing in a single pass where appropriate. Users should monitor pressure and wheel wear to maximize the benefit of the grinding aid and keep the tool and workpiece safe.

Compatibility and packaging details indicate a 4.5" diameter with a 5/8"-11 arbor, a common setup for many angle grinders. The product is packaged as individual discs, with each box containing ten units, which supports quick stocking and replenishment in maintenance or fabrication environments. Routine inspection for grain wear and backing integrity is recommended to maintain consistent performance and surface finish during use.

Features:

• Premium zirconia alumina grain on poly/cotton backing
• Durable and finish-oriented backing for balanced performance
• High stock removal with zirconia concentration
• Fastest stock removal in the marketplace for steel applications
• Active grinding aid for cool cutting under light pressure
• Aggressive use and heavy-duty performance
• Type 27, 4-1/2" diameter, 5/8-11" arbor, 40 grit