Norton 66254499894 Flap Disc 36 Grit Type 27 4.5 Inch

Product Description

The NORTON 66254499894 is a Type 27 ceramic alumina flap disc rated for up to 13,000 RPM, designed for heavy-duty grinding and surface work on ferrous and exotic metals. At 4.5 inches in diameter with a 5/8-11 threaded arbor hole, it mounts directly to standard right-angle grinders without an adapter. The disc carries a 36-grit extra-coarse ceramic alumina abrasive on Y-weight polyester cloth flaps bonded to a fiberglass backing plate. Ceramic alumina cuts cooler and fractures to expose fresh abrasive, extending disc life compared to conventional aluminum oxide. This disc is part of the NORTON R980P series and suits grinding, blending, edge deburring, and rapid stock removal.

The 66254499894 is suited for fabrication shops, welding operations, pipe yards, and maintenance facilities working with steel, stainless steel, titanium, and Inconel. The Type 27 flat-center profile keeps the abrasive surface flush to the workpiece, making it effective for surface grinding and blending on flat stock and structural shapes. It is a standard choice for fabricators, ironworkers, and pipefitters who need consistent, aggressive material removal with a single disc setup. Minimum order quantity is 10 units; each package contains 1 disc.

Key Features

• Ceramic alumina abrasive fractures during use to expose fresh cutting edges, extending service life
• 36-grit extra-coarse grade delivers rapid stock removal and aggressive surface conditioning
• Type 27 flat-center profile optimized for surface grinding and blending on flat workpieces
• Y-weight polyester cloth backing provides high tear resistance under heavy load
• Fiberglass backing plate maintains dimensional stability at rated speeds
• 5/8-11 threaded arbor hole fits standard right-angle grinders directly
• Rated to 13,000 RPM for use on 4.5-inch grinders

Compatibility

Designed for use on standard right-angle grinders with a 5/8-11 threaded spindle accepting 4.5-inch Type 27 flap discs. Suitable for material removal on steel, stainless steel, titanium, and Inconel.

Installation Notes

Installation and disc changes must be performed with the grinder powered off and unplugged or battery removed. Thread the disc clockwise onto the 5/8-11 spindle and confirm it is fully seated against the grinder guard before operation. Always verify the grinder's rated RPM meets or does not exceed the disc's 13,000 RPM maximum before mounting. Inspect the disc for visible damage before each use and follow ANSI B7.1 and applicable OSHA standards for abrasive wheel safety.