Merit Abrasives 08834172021 Psa Disc 5 in 100 Grit

Product Description

The MERIT ABRASIVES 08834172021 is a 5-inch PSA (pressure-sensitive adhesive) abrasive disc designed for surface grinding, finishing, and prep work on metal, wood, and composite materials. It uses aluminum oxide abrasive in a 100-grit fine grade, making it well-suited for light material removal and intermediate finishing passes. The cloth backing provides flexibility and durability, allowing the disc to conform to slightly contoured surfaces without tearing under load. This disc is installed by machinists, fabricators, and finishing technicians using PSA-compatible random orbital or disc sanders.

This abrasive disc is used in both shop and field applications where a self-adhesive mounting system is preferred over hook-and-loop. The 100-grit rating positions it for fine-grade work, including blending welds, smoothing metal surfaces before coating, and prepping wood for staining or sealing. The flexible cloth backing makes it a practical choice when working on surfaces that require moderate disc conformability. It is sold individually and fits standard 5-inch PSA sanding backup pads.

Key Features

• 5-inch diameter fits standard PSA backup pads
• 100-grit aluminum oxide abrasive for fine-grade surface finishing
• Cloth backing provides flexibility and tear resistance
• Pressure-sensitive adhesive mount for fast disc changes
• No vacuum holes — suited for solid backup pad use
• Black disc color with flexible construction for light contouring

Compatibility

Designed for use with 5-inch PSA-compatible sanding backup pads on random orbital sanders, disc sanders, and angle grinders configured for PSA disc mounting.

Installation Notes

Ensure the backup pad surface is clean and free of adhesive residue before mounting a new disc. Power down and disconnect the sander from its power source before changing abrasive discs. Press the disc firmly and evenly onto the backup pad to ensure full adhesive contact before use. Dispose of worn discs per shop waste guidelines and inspect the backup pad for damage between disc changes.