Dewalt DW8313 Type 29 Zirconia Flap Disc 4.5in 80 Grit

Product Description

The DEWALT DW8313 is a Type 29 zirconia alumina flap disc designed for aggressive grinding and blending on metal surfaces. The conical T29 profile increases the contact angle between the disc and the workpiece, making it well suited for work on flat surfaces and moderate contours. At 80 grit, it removes material efficiently while leaving a finish suitable for follow-up with a finer abrasive. The 4.5-inch diameter disc mounts via a 5/8 inches-11 threaded hub and is sold individually. Fabricators, welders, pipefitters, and ironworkers reach for this disc when they need consistent cut rate and long abrasive life from a standard angle grinder.

This flap disc is intended for use on carbon steel, stainless steel, and other ferrous metals in fabrication shops, structural steel work, and field welding applications. The 80-grit zirconia construction handles weld seam blending, surface prep before coating, and light stock removal. It fits standard 4.5-inch angle grinders with a 5/8 inches-11 arbor, which covers the majority of professional-grade grinders used in trades and fabrication environments.

Key Features

• Type 29 conical flap disc profile for increased contact angle on flat surfaces
• 80 grit zirconia alumina abrasive for aggressive stock removal with a blendable finish
• 4.5-inch diameter with 5/8 inches-11 threaded hub fits most professional angle grinders
• Zirconia grain self-sharpens during use, extending disc life compared to aluminum oxide
• Suitable for weld blending, surface preparation, and light grinding on ferrous metals

Compatibility

Designed as an OEM-style replacement and standard fitment flap disc for 4.5-inch angle grinders equipped with a 5/8 inches-11 threaded spindle.

Installation Notes

Installation and disc changes must be performed with the grinder unplugged or the battery pack removed. Confirm the grinder spindle speed rating meets or exceeds the maximum RPM marked on the disc before mounting. Use the correct flange and locking nut for the 5/8 inches-11 arbor and tighten securely before operation. Inspect the disc for damage before each use and discard any disc that shows cracking, delamination, or missing flaps.

Technical Specifications

• Disc Diameter: 4.5 inches
• Arbor Size: 5/8 inches-11
• Grit: 80
• Disc Type: Type 29 (T29)
• Abrasive Material: Zirconia Alumina
• Weight: 0.37 pounds
• UPC: 028877310497

Standard Information

• Brand: DEWALT
• Manufacturer Part Number: DW8313