Norton 77696097544 Flap Disc 4.5 in Type 27 Aluminum Oxide

Product Description

The NORTON 77696097544 is a Type 27 non-woven flap disc designed for aggressive surface conditioning and blending on metal, weld seams, and similar substrates. It measures 4.5 inches in diameter with a 5/8-11 arbor hole for direct mounting on standard angle grinders. The abrasive material is aluminum oxide in a coarse grade, suited for stock removal and surface prep tasks that demand a consistent, controllable cut. The fiberglass backing provides rigidity and dimensional stability during operation. Rated at 13,300 RPM, this disc is installed and used by metal fabricators, welders, pipefitters, and maintenance mechanics who need reliable material removal without switching tools.

This flap disc is well-suited for flat and depressed-center grinding applications in fabrication shops, field welding operations, and general metalworking environments. The Type 27 flat profile is preferred when working on flat surfaces or inside corners where a low grinding angle is needed. The non-woven aluminum oxide construction delivers consistent scratch patterns and surface finish throughout the life of the disc. It is sold individually and fits standard 4.5-inch angle grinders commonly found on commercial and industrial job sites.

Key Features

• Type 27 flat profile for low-angle grinding on flat surfaces and inside corners
• Aluminum oxide abrasive in coarse grade for aggressive stock removal and weld blending
• Non-woven abrasive construction delivers consistent cut and uniform scratch pattern
• Fiberglass backing provides structural rigidity and stability at operating speed
• 5/8-11 arbor hole fits standard angle grinder spindles without adapters
• 13,300 RPM max rating compatible with common 4.5-inch angle grinders

Compatibility

Designed for use with standard 4.5-inch angle grinders equipped with a 5/8-11 spindle thread, which is the industry-standard arbor size for this disc diameter class.

Installation Notes

Installation and operation should be performed by qualified personnel familiar with angle grinder safety practices. Always confirm the grinder's rated RPM meets or exceeds the disc's 13,300 RPM maximum before mounting. Power down and disconnect the grinder from its power source before installing or removing the disc. Wear appropriate PPE including a face shield, safety glasses, and gloves, and ensure the work area is clear of flammable materials when grinding metal.