Dewalt DW8310 Zirconia Type 29 Flap Disc 4.5 in 120 Grit

Product Description

The DEWALT DW8310 is a Type 29 zirconia flap disc designed for aggressive material removal and surface blending on angle grinders. The conical T29 profile keeps more abrasive surface in contact with the workpiece compared to a flat T27 disc, improving stock removal rates on curved or irregular surfaces. At 120 grit, this disc is suited for fine to medium finishing passes, light deburring, and surface preparation before coating or inspection. It measures 4.5 inches in diameter with a 0.875-inch arbor hole, fitting standard 4.5-inch angle grinders. Fabricators, pipefitters, welders, and general metalworkers install these discs during prep and finish stages of steel, stainless, and alloy workpieces.

This flap disc is used in light industrial, fabrication shop, and field service applications where a consistent scratch pattern and controlled material removal are required. The 120-grit zirconia abrasive handles finish grinding and blending on welds, edges, and flat stock. It is well suited for work on mild steel, stainless steel, and similar ferrous alloys. The 0.875-inch arbor fits the standard spindle found on most 4.5-inch angle grinders used in trade and shop environments.

Key Features

• Type 29 conical profile for increased contact angle on curved and flat surfaces
• 120-grit zirconia abrasive for finish grinding and surface blending
• 4.5-inch diameter with 0.875-inch arbor hole fits most standard angle grinders
• Zirconia grain self-sharpens during use, extending disc service life
• Lightweight at 0.18 pounds for reduced operator fatigue during extended use

Compatibility

Designed as an OEM-style replacement or consumable flap disc for 4.5-inch angle grinders equipped with a 0.875-inch arbor spindle.

Installation Notes

Flap discs are installed and replaced by metalworkers, welders, and fabricators using standard angle grinder tooling. Always power down and unplug or battery-isolate the grinder before mounting or removing a disc. Verify the grinder's maximum RPM rating meets or exceeds the disc's rated RPM before use, and confirm the arbor size matches before tightening. Follow ANSI B7.1 safe use standards for abrasive wheels when operating angle grinders with flap discs.

Technical Specifications

• Disc Type: Type 29 (Conical)
• Abrasive Material: Zirconia
• Grit: 120
• Diameter: 4.5 inches
• Arbor Size: 0.875 inches
• Weight: 0.18 pounds
• UPC: 028877310466

Standard Information

• Brand: DEWALT
• Manufacturer Part Number: DW8310