Norton 666233-57287 Aluminum Oxide Fiber Disc 80 Grit

Product Description

The NORTON 666233-57287 is an aluminum oxide fiber disc designed for aggressive material removal on metal, weld seams, and surface prep applications. Built on a rigid fiber backing, the disc mounts to a right-angle grinder with a compatible rubber or plastic backing pad. The aluminum oxide abrasive grain delivers consistent cut rate and controlled stock removal. At 80 grit, this disc sits in the medium-coarse range, making it well suited for blending welds, removing mill scale, and cleaning corroded surfaces before coating or fabrication work.

This disc is used primarily in metal fabrication shops, structural steel work, and general industrial maintenance. It fits standard 7-inch right-angle grinders and die grinders equipped with the appropriate backing pad. Typical applications include weld blending, rust removal, deburring, and surface conditioning on carbon steel, stainless steel, and cast iron. The 7/8-inch arbor hole provides a secure fit on standard grinder spindles. Discs are sold in a package of 25, making this a practical choice for shops that run high disc volumes and need a consistent supply on hand.

Key Features

• Aluminum oxide abrasive grain for consistent cut rate on ferrous metals
• 80 grit medium-coarse grade suited for weld blending and scale removal
• 7-inch diameter with 7/8-inch arbor hole fits standard right-angle grinder spindles
• Rigid fiber backing resists flexing under load for controlled stock removal
• Packaged in quantities of 25 for high-volume shop use

Compatibility

Designed as a replacement for NRT666233-57287. Fits standard 7-inch right-angle grinders using a compatible rubber or plastic backing pad with a 7/8-inch arbor.

Installation Notes

Installation and disc changes must be performed by qualified personnel following grinder manufacturer safety guidelines. Always power down and disconnect the grinder from its power source before mounting or removing a fiber disc. Inspect the backing pad for wear or damage before seating the disc, and confirm the disc is fully seated and secure before operation. Always verify the grinder RPM rating does not exceed the maximum rated speed of the disc.

Technical Specifications

• Abrasive Type: Aluminum Oxide
• Grit: 80
• Disc Diameter: 7 inches
• Arbor Hole Size: 7/8 inches
• Package Quantity: 25
• Unit of Measure: Each
• Minimum Order Quantity: 25

Standard Information

• Brand: NORTON
• Manufacturer Part Number: 666233-57287