Dewalt DW8321 Flap Disc 36 Grit 7 Inch Type 29

Product Description

The DEWALT DW8321 is a Type 29 zirconia alumina flap disc designed for aggressive material removal on steel and stainless steel surfaces. At 7 inches in diameter with a 7/8-inch arbor hole, it fits standard angle grinders and runs at a maximum of 8,700 RPM. The 36-grit extra coarse abrasive cuts fast and handles heavy stock removal, weld blending, and surface preparation. A fiberglass backing plate keeps the disc stable under load and resists flex during use. This disc is a practical choice for fabrication shops, maintenance crews, and trade professionals who need reliable abrasive performance on ferrous metals.

The DW8321 is suited for use on carbon steel, stainless steel, and similar ferrous materials in both shop and field applications. The Type 29 conical shape presents the abrasive at an angle to the workpiece, which increases surface contact and cutting efficiency compared to a flat Type 27 disc. It is commonly used for weld grinding, rust removal, and edge blending on structural steel, pipe, and plate. The fiberglass-backed construction handles the heat and mechanical stress typical of sustained grinding work.

Key Features

• Type 29 conical profile increases contact area for faster stock removal
• 36-grit extra coarse zirconia alumina abrasive for aggressive grinding
• 7-inch diameter with 7/8-inch arbor hole fits standard angle grinders
• 8,700 RPM maximum rated speed
• Fiberglass backing resists heat and mechanical flex under load
• Rated for steel and stainless steel applications

Compatibility

Designed for use with standard 7-inch angle grinders accepting a 7/8-inch arbor hole attachment.

Installation Notes

Installation should be performed by qualified personnel following grinder manufacturer guidelines and applicable ANSI B7.1 safety standards for abrasive wheels. Confirm the grinder's rated RPM meets or exceeds the disc's 8,700 RPM maximum before mounting. Always inspect the disc for damage before use and ensure the guard is in place. Power down and disconnect the grinder before mounting or removing the disc.