Norton 77696097539 Flap Disc 4-1/2 in Type 27 Aluminum Oxide

Product Description

The NORTON 77696097539 is a Type 27 non-woven flap disc designed for aggressive surface conditioning, blending, and finishing on metal and similar materials. At 4-1/2 inches in diameter with a 7/8 inch arbor hole, this disc mounts directly to standard angle grinders. The coarse-grade aluminum oxide abrasive delivers fast stock removal on ferrous and non-ferrous metals. A fiberglass backing plate supports the disc under load, maintaining shape and stability at speeds up to 13,300 RPM. The Type 27 flat profile suits flat and contoured surface work. This disc is sold as a single unit and is a standard tool for fabricators, welders, and metalworkers in shop and field environments.

This flap disc is suited for residential and light industrial metalworking applications including weld blending, rust removal, and surface preparation prior to coating or finishing. The non-woven aluminum oxide construction makes it appropriate for use on structural steel, pipe, sheet metal, and similar substrates. It is a practical single-pack option for technicians and tradespeople who need a reliable coarse-grade disc for angle grinder work without committing to bulk quantities.

Key Features

• Type 27 flat profile for flat and contoured surface grinding and blending
• Coarse-grade aluminum oxide non-woven abrasive for fast stock removal
• Fiberglass backing plate provides structural support under grinding load
• 4-1/2 inch diameter with 7/8 inch arbor hole fits standard angle grinders
• Rated to 13,300 RPM maximum operating speed
• Single-unit packaging for flexible procurement

Compatibility

Designed as an OEM-style replacement or direct-use flap disc for standard 4-1/2 inch angle grinders accepting a 7/8 inch arbor attachment.

Installation Notes

Installation and disc changes should be performed by qualified personnel with the grinder unplugged or the power source fully de-energized. Verify the grinder's rated RPM meets or exceeds the disc's 13,300 RPM maximum before mounting. Inspect the disc for damage before each use and never operate a cracked or delaminated disc. Follow ANSI B7.1 and tool manufacturer guidelines for proper disc mounting, guard positioning, and personal protective equipment.