Norton 77696090173 Flap Disc 80 Grit Type 27 3 Inch

Product Description

The NORTON 77696090173 is a Type 27 flap disc designed for grinding and blending applications on metal surfaces. It features an 80-grit zirconia alumina abrasive coating rated for medium-grade material removal. The fiberglass backing provides rigidity and heat resistance during aggressive stock removal. A Quick-Change Type R attachment makes disc swaps fast without additional hardware. Rated to 30,000 RPM, this disc suits high-speed angle grinders and die grinders used in fabrication, welding cleanup, and surface prep. It is installed and used by metal fabricators, pipefitters, ironworkers, and maintenance technicians who need consistent cut rate and disc longevity.

This flap disc is suited for grinding, deburring, and blending welds on carbon steel, stainless steel, and similar ferrous metals. The Type 27 flat profile is the standard choice for flat surface work and inside radius grinding. The 3-inch diameter targets tight access areas and smaller angle grinders or die grinders common in mechanical and fabrication shops. The Quick-Change Type R mount allows tool-free disc changes on compatible mandrels, reducing downtime during repetitive surface prep tasks.

Key Features

• 80-grit zirconia alumina abrasive for medium-grade stock removal and blending
• Type 27 flat profile optimized for flat surface grinding and weld blending
• Quick-Change Type R attachment for tool-free disc changes on compatible mandrels
• Fiberglass backing delivers rigidity and thermal stability under load
• 30,000 RPM maximum speed rating compatible with high-speed die grinders
• Compact 3-inch diameter suits confined work areas and smaller grinders

Compatibility

Designed for use with Quick-Change Type R mandrels on angle grinders and die grinders that accept 3-inch flap discs. Verify mandrel compatibility and maximum tool RPM before installation.

Installation Notes

Always confirm the grinder or die grinder maximum RPM meets or exceeds the disc rating before mounting. Disconnect the tool from its power source before changing discs. Inspect the disc for cracks or damage before each use and do not use a damaged disc. Follow ANSI B7.1 and applicable OSHA standards for abrasive wheel use, including proper guard installation and PPE.