Merit Abrasives 69957399727 Quick-change Disc 240 Grit 3 in

Product Description

The MERIT ABRASIVES 69957399727 is a 3-inch aluminum oxide quick-change abrasive disc designed for use with TR (Type III) and Type R quick-change attachment systems on handheld disc sanders. Rated at 240 grit (very fine grade), the disc features a Y-weight 2-ply polyester backing that provides rigidity and durability under demanding service conditions. The coated brown cloth construction delivers a faster cut rate and extended disc life compared to lighter backing weights. Maximum operating speed is 20,000 RPM. Licensed tradespeople and shop professionals use this disc for precision finishing, deburring, and surface conditioning on a range of ferrous and non-ferrous metals.

This disc is suited for surface preparation and finishing work on 300 series stainless steel, brass, bronze, hard carbon steels, soft carbon steels, and titanium. It performs well in fabrication shops, field service, and maintenance environments where a rigid, fast-cutting very fine disc is needed for detail work, edge cleanup, and light stock removal on metal substrates. Typical applications include deburring, cleaning, and final detailing passes where surface finish matters.

Key Features

• 240 grit aluminum oxide abrasive for very fine material removal and surface finishing
• Y-weight 2-ply polyester backing provides rigidity and extended service life
• TR (Type III) and Type R quick-change compatibility for fast disc swaps
• 20,000 RPM maximum rated speed for use on standard handheld disc sanders
• Rated for use on stainless steel, brass, bronze, hard and soft carbon steels, and titanium
• Rigid disc construction maintains consistent contact geometry on flat and contoured surfaces

Compatibility

Designed for use with TR (Type III) and Type R quick-change attachment systems on handheld disc sanders. Compatible material applications include 300 series stainless steel, brass, bronze, hard carbon steels, soft carbon steels, and titanium.

Installation Notes

Installation and disc changes should be performed by a qualified operator with the tool powered off and disconnected from its power source. Verify the tool spindle speed does not exceed the 20,000 RPM disc rating before operation. Inspect the disc for damage before each use and do not use discs that are torn, frayed, or delaminated. Follow applicable ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels and discs.