Norton 66261138679 Quick-change Disc 4 in 80 Grit Zirconia

Product Description

The NORTON 66261138679 is a coated quick-change abrasive disc designed for aggressive stock removal, weld blending, and deburring on metal and wood surfaces. Part of the R860 series, it uses zirconia alumina grain on a rigid Y-weight polyester backing rated for up to 15,000 RPM. The semi-open coat design reduces loading, and the self-sharpening grain fractures under pressure to expose fresh cutting edges throughout the life of the disc. At 4 inches in diameter and 80 grit, this disc suits medium-to-heavy material removal tasks on a handheld disc sander.

This disc attaches via a Type S (Speed-Lok TS, Type II) quick-change system, making tool-free pad swaps fast in production and field environments. Rated material applications include 300 and 400 series stainless steel, aluminum, brass, bronze, hard and soft carbon steels, hardwoods, and softwoods. The waterproof polyester backing holds up to coolant and light fluid exposure. Typical users include fabricators, welders, pipefitters, and millwrights working on structural steel, sheet metal, and weld seam cleanup. Sold individually with a minimum order quantity of 25 units.

Key Features

• Zirconia alumina grain self-sharpens under pressure for consistent cut rate and extended disc life
• Y-weight polyester backing rated rigid and waterproof, withstands demanding grind angles
• Semi-open coat reduces clogging on aluminum, softwoods, and other loading-prone materials
• Speed-Lok TS (Type S) attachment allows fast, tool-free disc changes on compatible handheld sanders
• 15,000 RPM maximum speed rating supports standard handheld disc sander operating speeds
• Broad material compatibility covers ferrous metals, non-ferrous metals, and wood in a single disc

Compatibility

Designed for use with handheld disc sanders equipped with a Speed-Lok TS (Type II, Type S) quick-change hub. Compatible material applications include 300 Series Stainless, 400 Series Stainless, Aluminum, Brass, Bronze, Hard Carbon Steels, Soft Carbon Steels, Hardwoods, and Softwoods.

Installation Notes

Installation is performed by pressing the disc button onto a compatible Speed-Lok TS quick-change hub until it seats and locks. Always confirm the tool spindle speed does not exceed the 15,000 RPM disc rating before operation. Wear appropriate PPE including eye protection and gloves when mounting or removing abrasive discs. Inspect the disc for cracks or delamination before each use and discard any damaged disc immediately.