Norton 66261131490 Psa Disc 320 Grit 5 in 100 Discs

Product Description

The NORTON 66261131490 is a pressure-sensitive adhesive (PSA) abrasive disc designed for surface finishing and material removal on flat and contoured workpieces. Part of the A275 series, this disc measures 5 inches in diameter and carries a 320 extra-fine grit aluminum oxide abrasive bonded to a lightweight B-weight paper backing. The PSA mounting system allows fast disc changes without tools, making it well suited for high-production finishing operations. Five vacuum holes are pre-punched to support dust extraction when used with compatible random orbital or disc sanders. Licensed tradespeople and finishing professionals in woodworking, metalworking, and automotive refinishing applications will find this grit level appropriate for final material prep and between-coat sanding.

This disc is used in light industrial and professional finishing environments where consistent scratch patterns and fast loading resistance are required. The aluminum oxide abrasive is a general-purpose mineral suited for sanding wood, painted surfaces, primers, and light metals. The flexible paper construction allows the disc to conform moderately to surface contours. Each package contains 100 discs, making it practical for shop stock or sustained production use.

Key Features

• 320 extra-fine grit aluminum oxide abrasive for final prep and between-coat sanding
• 5-inch diameter with PSA backing for tool-free disc mounting and fast changes
• B-weight paper backing provides flexibility for moderate surface contouring
• 5 pre-punched vacuum holes for dust extraction compatibility
• Part of the A275 series — a general-purpose finishing line for wood, paint, and light metal
• 100-disc pack supports sustained production use or shop inventory stocking

Compatibility

Designed for use with 5-inch PSA-style random orbital sanders and disc sanders equipped with hook-free or adhesive platens and compatible 5-hole dust extraction ports.

Installation Notes

Ensure the sander platen is clean and free of adhesive residue before applying a new disc, as contamination reduces bond strength and can cause disc slippage during operation. Power down and disconnect the sander before changing discs. Align vacuum holes with the platen ports to maintain effective dust extraction. Discs should be stored flat in a dry environment to prevent curl, which can reduce PSA contact and bond integrity.