3M 7000118889 Psa Disc 18 in 80 Grit Aluminum Oxide

Product Description

The 3M 7000118889 is a pressure-sensitive adhesive (PSA) abrasive disc built for aggressive material removal on large-format grinding and sanding applications. Measuring 18 inches in diameter and carrying an 80-grit, medium-grade aluminum oxide abrasive, this disc delivers consistent cut on metal, wood, composites, and painted surfaces. The X-weight cloth backing provides the stiffness and durability needed to handle high-pressure passes without tearing or loading prematurely. The PSA mount system allows fast disc swaps with a secure bond to compatible platens, minimizing downtime during production runs. Installation and use are typically handled by fabricators, metal finishers, woodworkers, and industrial maintenance technicians.

This disc is designed for use with bench-top motors and random orbital sanders that accept 18-inch PSA-style abrasive discs. The flexible construction conforms slightly to irregular or contoured workpiece surfaces without sacrificing cutting aggressiveness. The maroon-colored disc helps operators track wear visually during extended use. Series 348D identifies the product family within the 3M abrasives line. No vacuum holes are present, so this disc is suited to solid-platen setups without dust-extraction porting.

Key Features

• 18-inch diameter fits large-format bench-top and random orbital sanding equipment
• 80-grit aluminum oxide abrasive provides medium-grade, fast-cutting performance
• X-weight cloth backing resists tearing under high-pressure grinding passes
• Pressure-sensitive adhesive (PSA) mount for quick, tool-free disc changes
• Flexible construction for light contouring without sacrificing cut rate
• No vacuum holes — optimized for solid-platen machine setups

Compatibility

Compatible with bench-top motors and random orbital sanders that accept 18-inch PSA abrasive discs with a solid (non-perforated) platen. Part of the 3M 348D series.

Installation Notes

Ensure the machine platen is clean, dry, and free of adhesive residue before mounting a new disc; contamination reduces bond strength and can cause the disc to release during operation. Power down and disconnect or lock out the machine before changing discs. Press the PSA disc firmly onto the platen from center to edge to eliminate air pockets and ensure full adhesive contact. Inspect the disc for tears, loading, or uneven wear before each use and replace as needed.