Norton 77696090170 Flap Disc 36 Grit Type 27 3 Inch

Product Description

The NORTON 77696090170 is a Type 27 coated flap disc engineered for aggressive material removal in grinding and blending applications. Built with zirconia alumina abrasive at 36 grit coarse grade, it delivers fast cutting action on welds, mill scale, and heavy stock. The fiberglass backing provides structural rigidity under load, and the disc is rated to 30,000 RPM for use with compatible Quick-Change Type R angle grinders. At 3 inches in diameter, this disc suits tight-clearance work and smaller-tool setups. Metalworking tradespeople, fabricators, and maintenance technicians are the primary users.

This flap disc is suited for use on ferrous and non-ferrous metals in both light fabrication and heavy industrial environments. The 36 grit rating makes it appropriate for weld seam grinding, edge chamfering, and surface preparation prior to coating or inspection. The Quick-Change Type R attachment allows fast disc swaps without a wrench, reducing downtime during production or field work. The compact 3-inch diameter fits angle grinders commonly used in confined spaces such as pipe joints, structural steel connections, and HVAC ductwork fabrication.

Key Features

• Zirconia alumina abrasive provides aggressive, self-sharpening cutting action on metals
• 36 grit coarse grade rated for heavy stock removal and weld grinding
• Type 27 flat profile suitable for surface and edge grinding
• Fiberglass backing adds rigidity and supports consistent flap contact under pressure
• Quick-Change Type R attachment for tool-free disc changes
• Rated to 30,000 RPM for compatibility with high-speed small-diameter grinders

Compatibility

Designed for use with Quick-Change Type R angle grinders accepting 3-inch Type 27 flap discs rated to 30,000 RPM or higher.

Installation Notes

Installation and disc changes should be performed with the grinder powered off and unplugged or battery removed. Verify the grinder RPM rating meets or exceeds the disc maximum of 30,000 RPM before mounting. Inspect the disc for damage before each use and discard any disc showing cracks, missing flaps, or backing delamination. Always use appropriate eye protection, a face shield, and gloves when operating abrasive grinding equipment.