Norton 66261138320 Psa Disc 40 Grit 12 Inch Zirconia Alumina

Product Description

The NORTON 66261138320 is a pressure-sensitive adhesive (PSA) abrasive disc designed for aggressive material removal on large flat or contoured surfaces. Built on a Y-weight cloth backing, it delivers the flexibility and durability needed for high-pressure grinding and blending applications. The zirconia alumina abrasive grain self-sharpens under load, extending disc life and maintaining consistent cut rate throughout use. At 40 grit, this disc falls in the very coarse range, making it suited for rapid stock removal, weld blending, and surface preparation before finer finishing stages. The PSA adhesive mount allows fast disc changes on compatible backup pads without fasteners or hardware.

This disc is intended for use in metal fabrication, structural steel work, and heavy surface preparation tasks. The 12-inch diameter makes it a common fit for large-diameter disc sanders and floor grinding equipment used in industrial, commercial, and heavy-duty shop environments. The blue-colored, flexible cloth construction conforms to slight surface irregularities, making it useful on both flat stock and mildly curved workpieces. Metalworkers, fabricators, and surface prep technicians are the primary users of this product.

Key Features

• Zirconia alumina grain self-sharpens under grinding pressure for extended disc life
• Y-weight cloth backing provides high tensile strength and flexibility
• 40 grit coarse grade for rapid stock removal and weld blending
• PSA adhesive backing allows tool-free disc mounting and fast changeovers
• No vacuum holes — suited for solid backup pads without dust extraction ports
• Part of the Norton R821 series

Compatibility

Designed as an OEM-style replacement or direct-use PSA disc for 12-inch diameter backup pads and disc sanding equipment that accept pressure-sensitive adhesive mounted abrasive discs.

Installation Notes

Installation is performed by fabricators or surface prep technicians using standard disc sanding equipment. Before mounting, ensure the backup pad surface is clean and free of adhesive residue from previous discs to achieve a secure bond. Power down and disconnect the sander from its power source before changing discs. Do not exceed the maximum RPM rating of the backup pad in use.