Dewalt DW8357 Type 27 Zirconia Flap Disc 4.5in 60 Grit

Product Description

The DEWALT DW8357 is a Type 27 zirconia alumina flap disc engineered for aggressive grinding and blending on metal surfaces. At 4.5 inches in diameter with a 5/8 inches-11 threaded hub, it mounts directly to standard angle grinders. The 60-grit zirconia abrasive delivers consistent stock removal and resists heat buildup during extended use, making it a practical choice for fabrication shops, structural steel work, and on-site pipe and weld prep. Installers and fabricators across plumbing, mechanical, and general construction trades rely on this disc for both material removal and surface conditioning in a single pass.

The DW8357 is suited for use on mild steel, stainless steel, and other ferrous metals in residential and commercial fabrication and service environments. Its Type 27 flat profile keeps the disc parallel to the workpiece, which is preferred for surface grinding and blending flush welds. It is sold individually and is appropriate for any trade professional using a 4.5-inch angle grinder with a 5/8 inches-11 spindle.

Key Features

• 4.5-inch diameter with 5/8 inches-11 threaded arbor for standard angle grinder compatibility
• 60-grit zirconia alumina abrasive for aggressive stock removal and long disc life
• Type 27 flat profile optimized for surface grinding and flush weld blending
• Zirconia grain self-sharpens during use, maintaining cut rate over time
• Suitable for ferrous metals including mild steel and stainless steel

Compatibility

Designed as a direct-mount replacement flap disc for standard 4.5-inch angle grinders equipped with a 5/8 inches-11 threaded spindle.

Installation Notes

Flap discs are installed and replaced by the operator — no licensed trade certification is required, but standard angle grinder safety practices apply. Always power down and unplug or battery-isolate the grinder before mounting or removing a disc. Confirm the grinder RPM rating meets or exceeds the disc RPM rating before use, and inspect the disc for damage before each use. Eye protection and appropriate PPE are required during operation.

Technical Specifications

• Disc Diameter: 4.5 inches
• Arbor Size: 5/8 inches-11
• Grit: 60
• Abrasive Material: Zirconia Alumina
• Disc Type: Type 27
• Unit of Measure: Each
• Minimum Order Quantity: 5
• UPC: 885911036054

Standard Information

• Brand: DEWALT
• Manufacturer Part Number: DW8357