3M 7100224421 Flexible Diamond Qrs Cloth Disc 7x1 in M300

Product Description

The 3M 7100224421 is a flexible diamond abrasive cloth disc engineered for heavy-duty grinding and finishing on hard-to-machine materials including stone, glass, ceramic, metal, carbide, and composites. Measuring 7 inches in diameter with a 1-inch thickness profile, this disc uses micron-graded diamond abrasive particles secured with a metal-plated bond for consistent cut retention and long service life. The M300 designation indicates diamond grit grade, balancing aggressive material removal with a refined surface finish. A QRS (hook and loop) backing system allows fast disc changes without tools, reducing downtime in production or field applications. This disc is used by fabricators, machinists, tile setters, and surface finishing professionals who need a reliable abrasive solution for demanding substrates.

This disc is suited for grinding and finishing operations on hard surfaces where conventional abrasives wear quickly or fail to produce an acceptable finish. Typical applications include edge grinding on glass and stone slabs, surface preparation on ceramic and carbide components, and blending operations on composite materials. The flexible cloth backing conforms to slightly contoured or flat work surfaces, making it practical across a range of material removal and finishing tasks in shop and field environments.

Key Features

• Metal-plated bond anchors micron-graded diamond abrasive securely to prevent premature shedding
• M300 diamond grit grade delivers improved finish quality without sacrificing cut rate
• Flexible cloth backing conforms to flat and mildly contoured work surfaces
• QRS hook-and-loop attachment system enables fast, tool-free disc changes
• Heavy-duty construction rated for demanding applications on stone, glass, ceramic, metal, carbide, and composites
• Sold individually, minimum order quantity of one

Compatibility

Designed for use with QRS (hook and loop) compatible random orbital and disc grinding tools. Suitable for material removal and finishing on stone, glass, ceramic, metal, carbide, and composite substrates.

Installation Notes

This disc is installed and removed by a licensed or experienced fabrication or grinding professional familiar with abrasive tooling. Ensure the tool is powered off and unplugged before mounting or removing the disc. Align the hook-and-loop backing squarely with the tool pad before pressing firmly to seat the disc. Always wear appropriate personal protective equipment including eye protection and gloves when operating grinding tools, and verify tool speed ratings are compatible with the disc before use.

Technical Specifications

• Diameter: 7 inches
• Thickness: 1 inch
• Grit Grade: M300
• Abrasive Type: Micron-graded diamond
• Bond Type: Metal-plated
• Backing Type: QRS hook and loop cloth
• Unit of Measure: Each
• UPC: 00051115197604

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100224421