Norton 69957398017 Fiber Disc 9.125 in 50 Grit Ceramic

Product Description

The NORTON 69957398017 is a ceramic alumina fiber disc designed for aggressive material removal on metal, weld seams, and other hard surfaces. Part of the R980 series, this coarse-grade disc pairs a resinoid bond with a fiber backing to deliver consistent cut rate and durability under sustained pressure. At 50 grit, it removes stock quickly without loading, making it a go-to choice for fabricators and metal finishing professionals. The disc measures 9.125 inches in diameter with a 7/8-inch arbor hole and is rated to 6,600 RPM for use on angle grinders and disc grinders. Orange disc color aids identification on busy shop floors.

This disc is suited for grinding, blending, and deburring operations in metal fabrication, structural steel work, and weld preparation environments. The 9.125-inch diameter targets larger-format grinders used in production and heavy trade applications. Ceramic alumina abrasive provides a self-sharpening cutting action that maintains performance longer than conventional aluminum oxide discs, reducing disc changes during extended runs. Coarse 50 grit makes this disc appropriate for initial stock removal and weld bead leveling rather than finish or blending work.

Key Features

• Ceramic alumina abrasive for self-sharpening, high-cut-rate performance
• 50 grit coarse grade suited for aggressive stock removal and weld leveling
• Fiber backing provides rigidity and support under grinder pressure
• Resinoid bond resists heat buildup during sustained grinding
• 7/8-inch arbor hole fits standard disc grinder arbors
• 6,600 RPM maximum speed rating

Compatibility

Designed for use on angle grinders and disc grinders accepting 9.125-inch fiber discs with a 7/8-inch arbor hole attachment. Verify tool RPM rating meets or exceeds the 6,600 RPM maximum before mounting.

Installation Notes

Installation should be performed by a qualified operator familiar with abrasive disc safety and angle grinder operation. Always power down and disconnect the grinder before mounting or removing a disc. Confirm the grinder spindle speed does not exceed the 6,600 RPM maximum rating marked on the disc. Inspect the disc for cracks or damage before each use and discard any disc that shows signs of delamination or compromise. Follow ANSI B7.1 safe use requirements for bonded abrasives.