3M 7100113143 Cubitron Ii Hookit 947A Disc 6 Inch 40 Grit

Product Description

The 3M 7100113143 is a Cubitron II Hookit 947A coated abrasive cloth disc designed for aggressive material removal on demanding metals. Built on an X-weight polyester-cotton cloth backing, the disc uses 3M Precision Shaped Grain technology to cut faster and last longer than conventional abrasive grains. A built-in grinding aid reduces heat buildup at the workpiece surface, and a resin bond system resists thermal degradation to minimize discoloration. At 6 inches in diameter and 40 grit, this disc is suited for stock removal and blending work in fabrication and finishing environments. Metal fabricators, weld grinders, and production operators are the primary installers and users.

This disc is intended for medium to high pressure grinding and blending applications on stainless steel, carbon steel, nickel alloys, cobalt chrome, and other exotic alloys. The Hookit attachment system allows fast disc changes without tools, making it practical for high-volume production environments where downtime between disc changes must be minimized. It is well suited for angle grinder and right-angle sander applications in metal fabrication shops, aerospace component finishing, and welding operations where heat-sensitive materials require controlled grinding temperatures.

Key Features

• Precision Shaped Grain delivers fast, consistent cut rates across the disc life
• X-weight polyester-cotton cloth backing provides durability under aggressive pressure
• Built-in grinding aid actively reduces heat and lowers grinding temperatures at the workpiece
• Resin bond resists heat to prevent workpiece discoloration during extended use
• Hookit attachment system enables tool-free disc changes and disc reuse
• 40 grit designation targets heavy stock removal and initial blending passes

Compatibility

Designed for use with Hookit-compatible random orbital sanders and angle grinders accepting 6-inch hook-and-loop discs. Suited for stainless steel, carbon steel, cobalt chrome, nickel alloys, and other exotic alloys as noted in manufacturer specifications.

Installation Notes

This disc is installed and replaced by metal fabricators and grinding operators — no licensed trade certification is required, but proper PPE including eye protection, gloves, and hearing protection is mandatory during use. Ensure the tool is powered off and unplugged before mounting or removing the disc. Verify the tool's maximum RPM rating meets or exceeds the disc's rated speed before operation. Inspect the Hookit backing pad for wear before each disc change to ensure secure attachment.

Technical Specifications

• Disc Diameter: 6 inches
• Grit: 40
• Backing Material: X-weight polyester-cotton cloth
• Abrasive Type: Precision Shaped Grain with grinding aid
• Bond Type: Resin
• Attachment Type: Hookit hook-and-loop
• Package Weight: 13.16 pounds
• Package Length: 23.8 inches
• Package Width: 6.9 inches
• Package Height: 7.3 inches
• Unit of Measure: Each
• UPC: 076308457193

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100113143