Norton 666233-57278 Resin Fiber Disc 50 Grit 5x7/8 Inches

Product Description

The NORTON 666233-57278 is a resin fiber disc engineered for heavy stock removal in demanding grinding and blending applications. Built on the Merit FX370 fiber backing, this disc uses aluminum oxide abrasive grain bonded with a durable resin system to deliver consistent cut rate and long service life. At 50 grit, it is suited for aggressive material removal on welds, castings, and fabricated steel components. The disc measures 5 inches in diameter with a 7/8-inch arbor hole and is sold by the box. It is typically installed and used by metalworkers, fabricators, and maintenance technicians working with angle grinders in production or field environments.

This disc is designed for use on angle grinders in both shop and field settings. The 50-grit aluminum oxide abrasive performs well on ferrous metals, including mild steel and cast iron, where heavy stock removal or surface conditioning is the primary task. It is well suited to weld grinding, scale removal, and edge blending on fabricated assemblies. The FX370 fiber backing provides the stiffness needed to maintain disc geometry under load during extended grinding passes.

Key Features

• 50-grit aluminum oxide abrasive for aggressive stock removal
• Merit FX370 fiber backing for rigidity and durability under load
• Resin bond construction resists heat buildup during continuous use
• 5-inch diameter with 7/8-inch arbor hole fits standard angle grinders
• Economically priced for high-volume grinding and blending tasks

Compatibility

Designed as an OEM-style replacement or direct-fit disc for standard 5-inch angle grinders accepting a 7/8-inch arbor.

Installation Notes

Resin fiber discs must be mounted on a matching backup pad rated for the disc diameter before use on an angle grinder. Verify the grinder RPM rating meets or exceeds the disc maximum RPM before operation. Always power down and disconnect or de-energize the grinder before changing discs. Operators should wear appropriate PPE including face shield and gloves in accordance with applicable ANSI grinding safety standards.

Technical Specifications

• Abrasive Material: Aluminum Oxide
• Backing: FX370 Resin Fiber
• Grit: 50
• Disc Diameter: 5 inches
• Arbor Hole: 7/8 inches
• Weight: 1.65 pounds
• Unit of Measure: Box
• Minimum Order Quantity: 1

Standard Information

• Brand: NORTON
• Manufacturer Part Number: 666233-57278