Norton 66261136720 Psa Disc 18 in 36 Grit Aluminum Oxide

Product Description

The NORTON 66261136720 is an 18-inch PSA (pressure-sensitive adhesive) abrasive disc designed for aggressive material removal on large-surface grinding and sanding applications. Built on an X-weight cloth backing, this disc delivers the rigidity needed to maintain consistent contact under load. The abrasive material is aluminum oxide at 36 grit, placing it firmly in the very coarse grade range. That combination makes it suited for rapid stock removal, weld blending, rust and scale removal, and surface prep work prior to finishing. Licensed tradespeople and production grinding operators are the primary installers and users of this disc type.

This disc is intended for use on large-diameter PSA-compatible rotary sanders, disc grinders, and floor grinding machines that accept 18-inch adhesive-mount abrasive media. The X-weight cloth backing handles the flex and heat generated during extended grinding passes on metal, wood, and composite surfaces. The flexible construction allows the disc to conform slightly to irregular surfaces. No vacuum holes are present, making this disc appropriate for solid-platen backing pads without dust extraction ports. The Series R228 designation identifies the product line within the NORTON abrasive disc family.

Key Features

• 18-inch diameter PSA mount — fits large-format rotary disc machines with adhesive backing pads
• 36 grit aluminum oxide abrasive for very coarse, high-rate stock removal
• X-weight cloth backing provides durability and resistance to tearing under heavy load
• Flexible construction allows moderate surface conformance during grinding passes
• No vacuum holes — designed for solid-platen PSA backing pads
• Brown disc color; Series R228 product line

Compatibility

Designed as an OEM-style replacement or direct-use abrasive disc for large-format PSA rotary sanders and disc grinders that accept 18-inch pressure-sensitive adhesive abrasive media with solid-platen backing pads.

Installation Notes

Mounting is performed by peeling the adhesive liner and pressing the disc firmly onto a clean, dry PSA backing pad, ensuring full surface contact to prevent lifting during operation. Ensure the machine is powered off and unplugged, or the disc grinder is locked out, before changing abrasive media. Inspect the backing pad for wear, debris, or residual adhesive before mounting a new disc, as surface contamination reduces adhesion and can cause disc separation under load. Wear appropriate PPE including eye protection and gloves when handling and operating abrasive discs.