3M 7000118878 Psa Abrasive Disc 3 Inches 40 Grit

Product Description

The 3M 7000118878 is a pressure-sensitive adhesive (PSA) abrasive disc designed for aggressive material removal on a variety of surfaces. Built on an X-weight cloth backing, this disc delivers the rigidity and durability needed for heavy stock removal applications. The aluminum oxide abrasive grain runs at a coarse 40 grit, making it well-suited for initial grinding, weld blending, rust removal, and surface prep work. The PSA mount allows for fast, secure attachment to compatible backup pads without fasteners or hardware. The flexible construction conforms to contoured workpieces while maintaining consistent cut.

This disc is rated for use on bench top motors, disc sanders, and random orbital sanders in both shop and field environments. At 3 inches in diameter, it fits compact tooling commonly used in metal fabrication, woodworking, and maintenance repair operations. The coarse grit is appropriate for rapid material removal before transitioning to finer finishing steps. The maroon disc color is standard for this grit and backing combination. No vacuum holes are included, so this disc is intended for solid backup pad configurations.

Key Features

• Aluminum oxide abrasive grain provides consistent cut rate and long service life on metal and wood substrates
• X-weight cloth backing offers high tensile strength and resistance to tearing under load
• Pressure-sensitive adhesive mount enables quick disc changes without tools
• Flexible construction allows the disc to conform to irregular or curved surfaces
• No vacuum holes — compatible with solid backup pad configurations
• 3-inch diameter fits compact bench top motors, disc sanders, and random orbital sanders

Compatibility

Compatible with bench top motors, disc sanders, and random orbital sanders that accept 3-inch PSA backup pads. No vacuum hole pattern, so use with solid (non-vented) backup pads only.

Installation Notes

Installation is performed by trade professionals and experienced technicians in fabrication or maintenance settings. Before mounting, ensure the tool is powered off and unplugged or locked out per applicable safety procedures. Clean the backup pad surface of dust and debris before pressing the PSA disc firmly into place to ensure full adhesive contact. Do not exceed the maximum RPM rating of the tool or backup pad being used.