Norton 66623304856 Deburring Disc 4 in Extra Coarse

Product Description

The NORTON 66623304856 is a rigid deburring disc designed for aggressive material removal on metal workpieces during grinding, finishing, and deburring operations. Constructed from a dual-abrasive blend of aluminum oxide and ceramic, this disc delivers fast cutting action suited to extra coarse stock removal. The 4-inch diameter disc mounts via a 1/2-inch arbor connection and operates at up to 8000 RPM, making it compatible with standard angle grinders and disc grinders used in fabrication and maintenance work. With a density rating of 7 and a rigid construction, it maintains consistent contact across flat surfaces. Metalworking professionals and fabricators use this disc to clean up weld seams, remove burrs, and prep surfaces prior to inspection or coating.

This deburring disc is suited for use in metal fabrication shops, maintenance and repair facilities, and light industrial environments. Its extra coarse grade makes it most effective on ferrous and non-ferrous metals where rapid material removal is needed before finer finishing steps. The rigid disc format is preferred when working on flat or near-flat surfaces where consistent abrasive contact improves efficiency. Licensed tradespeople and skilled fabricators in HVAC, plumbing, and general mechanical work commonly use discs of this type during pipe prep, panel work, and structural component fabrication.

Key Features

• Dual abrasive construction combining aluminum oxide and ceramic for fast, aggressive cutting
• Extra coarse grade suited for rapid burr removal and weld seam cleanup
• Rigid disc body maintains consistent surface contact on flat workpieces
• Arbor mount with 1/2-inch center hole fits standard disc grinder spindles
• Rated to 8000 RPM for use with common angle and disc grinders
• Density rating of 7 provides firm abrasive structure during heavy-duty passes

Compatibility

Designed as an OEM-style replacement deburring disc for use with standard 4-inch disc grinders and angle grinders equipped with a 1/2-inch arbor spindle.

Installation Notes

Installation and disc changes should be performed by a qualified operator following all applicable ANSI B7.1 safety standards for abrasive disc use. Always power down and disconnect the grinder from its power source before mounting or removing the disc. Inspect the disc for cracks or damage before each use and never exceed the rated maximum RPM of 8000. Ensure the arbor nut is tightened securely and the guard is in place before starting the tool.