3M 7100310792 Fiber Disc 36 Grit 9-1/8 Inches Ceramic

Product Description

The 3M 7100310792 is a coated abrasive fiber disc engineered for aggressive material removal on metal, weld seams, and hard surfaces. It measures 9-1/8 inches in diameter with a 7/8 inch arbor hole for direct mounting to compatible angle grinders and disc grinders. The abrasive grain is 3M Precision Shaped Ceramic, a structured ceramic mineral that fractures along predictable planes to expose fresh cutting edges throughout the disc life. At 36 grit, this disc is suited to heavy stock removal, weld grinding, and surface leveling. A resinoid bond holds the grain to a fiber backing, and the disc is rated to a maximum of 6,650 RPM.

This fiber disc is used in industrial fabrication, structural steel work, shipbuilding, pipeline, and general metalworking applications where consistent cut rate and long disc life are priorities. The 9-1/8 inch diameter is a common size for large-diameter angle grinders and right-angle grinders used in commercial and industrial settings. The purple-colored grain identifies the Precision Shaped Ceramic Series 1187C formulation. Licensed metalworkers, welders, pipefitters, and fabricators are the primary installers and users of this product.

Key Features

• Precision Shaped Ceramic abrasive grain for consistent cut rate and extended disc life
• 36 grit for heavy stock removal and aggressive weld grinding
• 9-1/8 inch disc diameter with 7/8 inch arbor hole attachment
• Resinoid bond on fiber backing for durability under high-pressure grinding
• Rated to 6,650 RPM maximum operating speed
• Series 1187C purple grain identification for easy field recognition

Compatibility

Designed for use with large-diameter angle grinders and disc grinders that accept a 9-1/8 inch fiber disc with a 7/8 inch arbor hole attachment.

Installation Notes

Installation and use should be performed by trained personnel following ANSI B7.1 and applicable safety standards for abrasive wheel products. Confirm the grinder guard is in place and the tool RPM rating meets or exceeds the disc maximum of 6,650 RPM before mounting. Inspect the disc for damage before each use and do not use a disc that shows cracks, tears, or delamination. Always wear appropriate PPE including eye protection and gloves when operating grinding equipment.