Norton 66261137456 Fiber Disc 50 Grit 7 in Zirconia Alumina

Product Description

The NORTON 66261137456 is a 7-inch coarse-grade fiber disc engineered for aggressive stock removal on metal, weld seams, and hard surfaces. Built on a resinoid-bonded fiber backing, it uses zirconia alumina abrasive at 50 grit to cut fast and run cool under load. The threaded arbor hole accepts a 5/8-11 spindle thread and is designed for use with the Norton AVOS Speed-Lok back-up pad system. Rated to 8600 RPM, it suits right-angle grinders used by metal fabricators, pipefitters, and industrial maintenance technicians who need consistent cut rate over extended use.

This disc is suited for heavy grinding and blending applications in metal fabrication shops, structural steel work, and pipe preparation. The 50-grit zirconia alumina grain is a strong choice for initial weld cleanup, rust removal, and surface conditioning before coating or inspection. The fiber backing provides the rigidity needed to maintain flat contact across weld beads and irregular surfaces. It is sold individually and is appropriate for both production floor and field service use.

Key Features

• 7-inch disc diameter for broad contact area on flat and curved metal surfaces
• 50 grit coarse zirconia alumina abrasive delivers aggressive cut rate
• Resinoid bond holds grain firmly under high-speed grinding loads
• Threaded arbor hole with 5/8-11 thread for secure spindle attachment
• Rated to 8600 RPM for use with standard right-angle grinders
• Compatible with Norton AVOS Speed-Lok back-up pad system

Compatibility

Designed for use with the Norton AVOS Speed-Lok back-up pad. Requires a grinder or angle grinder with a 5/8-11 threaded spindle and a maximum no-load speed at or below 8600 RPM.

Installation Notes

Mounting and disc changes must be performed with the grinder unplugged or the circuit locked out per OSHA lockout/tagout procedures. Inspect the disc for cracks or damage before each use and do not exceed the rated 8600 RPM. Wear appropriate PPE including a face shield, gloves, and hearing protection during operation. Ensure the back-up pad is properly seated and the threaded arbor connection is secure before grinding.