Norton 66261135578 Psa Disc 5 in 320 Grit Aluminum Oxide

Product Description

The NORTON 66261135578 is a pressure-sensitive adhesive (PSA) abrasive disc designed for fine surface preparation and finishing work. Built on a flexible cloth backing with an X-weight designation, it delivers consistent cut and conformability on contoured and flat surfaces alike. The disc uses aluminum oxide abrasive at 320 grit, placing it in the extra fine grade range — suited for final sanding passes, between-coat finishing, and light stock removal on wood, metal, or composites. At 5 inches in diameter, it mounts directly to PSA-compatible backup pads without fasteners or hook-and-loop hardware.

This disc is used in both residential and light industrial finishing applications. Common install scenarios include furniture and cabinetry finishing, automotive body prep, and metal surface conditioning before coating. The flexible cloth backing allows the disc to conform to slight surface variations, making it effective on assemblies where a rigid disc would leave uneven scratch patterns. No vacuum holes are present, so it is intended for use on solid backup pads rather than dust-collection systems.

Key Features

• 320 grit aluminum oxide abrasive for extra fine material removal and surface finishing
• Pressure-sensitive adhesive backing for tool-free, secure pad attachment
• Flexible X-weight cloth backing conforms to curved and irregular surfaces
• 5-inch diameter fits standard PSA backup pads
• No vacuum holes — solid pad compatible
• Series R228 construction for consistent abrasive performance

Compatibility

Designed for use with 5-inch PSA-style backup pads on random orbital and rotary sanders configured for adhesive-mount discs.

Installation Notes

Installation is performed by trade professionals and experienced finishers using standard PSA-compatible backup pads. Before mounting, ensure the backup pad surface is clean and free of adhesive residue from previous discs to maintain full contact and prevent premature release. Peel the liner from the adhesive side and press the disc firmly and evenly onto the pad before starting the tool. Discard and replace the disc when abrasive cutting action diminishes or if the disc shows signs of loading, tearing, or edge lifting.