Norton 66623340021 Quick-change Disc 3/4 in Tr Aluminum Oxide

Product Description

The NORTON 66623340021 is a quick-change abrasive disc from the Bear-Tex Rapid Prep series, designed for surface preparation, blending, and finishing on metal and composite materials. It measures 3/4 inches in diameter and uses a TR (Type III) attachment system with a Type R backing for fast tool-free disc changes. The aluminum oxide abrasive grain is bonded to a flexible polyester and nylon web backing, rated for up to 40000 RPM. Coarse grit (50) makes it suitable for moderate material removal and surface conditioning. Licensed HVAC technicians, machinists, and metal fabricators will recognize this disc as a compact, high-speed option for tight-access surface work.

The 66623340021 is built for use with die grinders and handheld disc sanders in both shop and field environments. Its flexible, high-loft nylon fiber construction and Clean Bond resin technology allow it to work across a wide range of base materials without loading or smearing the workpiece surface. Compatible materials include 300 and 400 series stainless steel, brass, bronze, cast iron, copper, ductile iron, fiberglass and composites, gray iron, hard and soft carbon steels, super alloys, titanium, and tool steels. Sold individually with a minimum order quantity of 50 units.

Key Features

• TR (Type III) quick-change attachment with Type R backing for rapid disc swaps
• Aluminum oxide abrasive grain rated for higher cut rate and consistent performance
• High-loft nylon fiber construction extends disc service life
• Clean Bond resin technology delivers smear-free finishes on sensitive alloys
• Flexible polyester and nylon web backing conforms to irregular and contoured surfaces
• Coarse grit (50) supports moderate material removal across a broad material range

Compatibility

Designed for use with die grinders and handheld disc sanders that accept TR (Type III) quick-change attachments with a Type R interface. Compatible base materials include 300 Series Stainless, 400 Series Stainless, Brass, Bronze, Cast Iron, Copper, Ductile Iron, Fiberglass/Composites, Gray Iron, Hard Carbon Steels, Soft Carbon Steels, Super Alloys, Titanium, and Tool Steels.

Installation Notes

Installation is performed by metal fabricators, machinists, or maintenance technicians using a compatible TR (Type III) quick-change die grinder or handheld disc sander. Confirm the tool spindle speed rating meets or exceeds the disc maximum RPM before mounting. Inspect the disc for damage before each use and discard any disc that shows tears, delamination, or core damage. Always wear appropriate PPE including eye protection and gloves when operating abrasive discs at high speed.