Norton 69957398012 Ceramic Fiber Disc 7 Inch 50 Grit

Product Description

The NORTON 69957398012 is a 7-inch ceramic alumina fiber disc engineered for aggressive stock removal on metal, weld seams, and hard-to-grind alloys. Built on a rigid fiber backing with a resinoid bond, it accepts a standard 7/8-inch arbor hole and runs at up to 8,600 RPM. The 50-grit coarse cut rating makes it a go-to choice for deburring, blending, and surface conditioning where speed of cut matters more than fine finish. Licensed grinding and metalworking professionals reach for this disc when production rates demand consistent abrasive performance over many passes.

This disc is suited for angle grinder applications in fabrication shops, structural steel work, pipeline welding prep, and heavy manufacturing environments. The ceramic alumina grain self-sharpens as it wears, sustaining cut rate longer than conventional aluminum oxide grains. The orange fiber backing provides dimensional stability under the flex and heat generated during grinding. It is sold individually and is appropriate for both intermittent touch-up grinding and extended production runs where disc changeovers need to stay predictable.

Key Features

• Ceramic alumina abrasive grain for aggressive, self-sharpening cut on hard metals
• 50-grit coarse grade rated for fast stock removal and weld blending
• Rigid fiber backing with resinoid bond for stability at high RPM
• 7/8-inch arbor hole fits standard right-angle grinder spindles
• Maximum operating speed of 8,600 RPM
• Part of the R980 series, color-coded orange for quick grit identification

Compatibility

Designed as a direct-fit replacement fiber disc for 7-inch right-angle grinders and disc grinders that accept a 7/8-inch arbor hole attachment.

Installation Notes

Installation should be performed by qualified grinding or fabrication personnel following ANSI B7.1 safety standards for abrasive wheel mounting. Always power down and disconnect the grinder before mounting or removing a disc. Inspect the fiber disc for cracks, warps, or damage before each use and never exceed the rated maximum RPM printed on the disc or listed on the package. Use the correct flange and backing pad specified for fiber disc grinding to ensure proper support across the full disc face.