3M 7100099291 Ceramic Fiber Disc 36 Grit 4.5 in

Product Description

The 3M 7100099291 is a ceramic abrasive fiber disc designed for aggressive material removal on metal, weld seams, and other hard surfaces. Part of the 787C Series, this disc uses a resinoid bond and a fiber backing to withstand the heat and pressure typical of heavy grinding applications. At 36 grit, it falls in the very coarse range, making it well-suited for rapid stock removal rather than finishing work. The TN Quick-Change attachment system allows the disc to mount and dismount without tools, reducing downtime during high-volume grinding tasks. Licensed trades and fabricators rely on this disc for consistent, repeatable cut rates on demanding materials.

This disc is intended for use with a 3M TN Quick-Change backup pad on angle grinders and disc grinders rated for its maximum speed. It is appropriate for residential and commercial metalworking, fabrication shops, industrial maintenance, and job-site metal prep. Common applications include weld blending, surface conditioning, rust removal, and edge grinding on steel and similar ferrous metals. The 4.5-inch diameter fits standard compact angle grinders commonly found in HVAC, plumbing, and general trade toolkits.

Key Features

• Ceramic abrasive construction delivers fast, consistent stock removal on hard metals
• 36 grit very coarse grade optimized for aggressive material removal and weld blending
• TN Quick-Change attachment allows tool-free disc swaps on compatible backup pads
• Resinoid bond holds abrasive grain firmly under high-pressure grinding conditions
• Fiber backing provides rigidity and durability during heavy use
• Maximum rated speed of 13,300 RPM suits standard angle grinder applications

Compatibility

Designed for use with 3M TN Quick-Change backup pads. Fits angle grinders and disc grinders with a 5/8-11 center hole thread size and a maximum spindle speed at or above 13,300 RPM.

Installation Notes

Installation is performed by attaching the disc to a compatible 3M TN Quick-Change backup pad mounted on an angle grinder. Always confirm the grinder's rated RPM meets or exceeds the disc's 13,300 RPM maximum before use. Power down and disconnect the grinder from its power source before mounting or removing the disc. Wear appropriate PPE including eye protection and gloves, and inspect the disc for damage before each use.