Norton 66254461173 Flap Disc 80 Grit Type 29 4-1/2 Inch

Product Description

The NORTON 66254461173 is a Type 29 zirconia alumina flap disc engineered for aggressive material removal and blending on steel surfaces. Part of the R860 series, it features a fiberglass-backed construction with cloth abrasive flaps bonded in an overlapping pattern to deliver consistent stock removal and a smooth finish in a single operation. The 80-grit medium-grade abrasive cuts efficiently on mild and stainless steels while resisting loading. Rated at 13,300 RPM, this disc is built to handle the demands of continuous grinding and weld blending in fabrication and maintenance environments.

This flap disc is suited for angle grinder applications in metal fabrication shops, structural steel work, and general maintenance welding operations. The Type 29 conical profile positions the abrasive surface at an angle to the workpiece, making it effective for aggressive edge work, weld seam removal, and surface preparation on flat and curved stock. The threaded arbor hole accepts standard 5/8-11 spindle fittings common to 4-1/2 inch angle grinders. It is typically used by ironworkers, pipefitters, and fabricators who need a disc that transitions smoothly from cutting to blending without a tool change.

Key Features

• Type 29 conical profile for aggressive contact angle on flat and contoured surfaces
• 80-grit zirconia alumina abrasive delivers medium-grade stock removal on steel
• Fiberglass backing provides rigidity and support under load
• 13,300 RPM max speed rating for use with standard 4-1/2 inch angle grinders
• 5/8-11 threaded arbor hole fits common angle grinder spindles without an adapter
• R860 series cloth flap construction resists loading during extended grinding passes

Compatibility

Designed for use with 4-1/2 inch angle grinders equipped with a 5/8-11 threaded spindle. Abrasive material is rated for application on steels per manufacturer specifications.

Installation Notes

Installation should be performed by a qualified operator familiar with angle grinder safety practices. Disconnect power and verify the grinder is fully de-energized before mounting or removing the disc. Confirm the grinder spindle speed does not exceed the 13,300 RPM maximum rating marked on the disc before operation. Inspect the disc for cracks or damage before each use and never operate a damaged abrasive disc.