3M 7000118879 Psa Disc 3 in 50 Grit Aluminum Oxide

Product Description

The 3M 7000118879 is a pressure-sensitive adhesive (PSA) abrasive disc designed for aggressive material removal on metal, wood, and composites. Measuring 3 inches in diameter and carrying a coarse 50-grit aluminum oxide abrasive, it mounts quickly to PSA-compatible backup pads without fasteners or hook-and-loop hardware. The X-weight cloth backing resists tearing under load and flexes enough to conform to contoured surfaces. This disc is built for production grinding and blending tasks where a coarse cut rate is required, and it is commonly installed and used by metal fabricators, machinists, and general tradespeople.

This disc is suited for use on bench top motors, disc sanders, and random orbital sanders in both shop and field environments. The maroon-colored, cloth-backed construction handles the heat and friction generated during sustained grinding passes on ferrous and non-ferrous stock. The PSA mount makes disc swaps fast during high-volume operations. No vacuum holes are present, so the disc is best paired with solid backup pads rather than dust-extraction setups.

Key Features

• 3-inch diameter fits standard PSA backup pads for bench top motors, disc sanders, and random orbital sanders
• 50-grit aluminum oxide delivers a coarse cut rate suited to rapid stock removal and surface prep
• X-weight cloth backing provides durability and flexibility for flat and contoured work surfaces
• Pressure-sensitive adhesive mount allows fast, tool-free disc changes
• No vacuum holes — compatible with solid backup pad configurations
• Flexible construction allows the disc to conform to irregular or curved surfaces

Compatibility

Compatible with bench top motors, disc sanders, and random orbital sanders equipped with PSA-style backup pads accepting a 3-inch disc.

Installation Notes

Power down and de-energize the sander or motor before mounting or removing the disc. Peel the adhesive liner cleanly and seat the disc firmly at the center of the backup pad, pressing outward to eliminate air pockets. Inspect the backup pad surface for debris or dried adhesive residue before applying a new disc, as contamination reduces adhesion and can cause the disc to release under load. This product is intended for use by experienced tradespeople familiar with abrasive tool safety practices.