Merit Abrasives 08834166291 Quick-change Disc 3 in Medium

Product Description

The MERIT ABRASIVES 08834166291 is a 3-inch non-woven aluminum oxide quick-change disc designed for surface conditioning and finishing work on metal and composite materials. It uses a Power-Lock Type 3 (TR/Type III) attachment system and is rated to 20,000 RPM, making it compatible with standard die grinders and inline grinders used in fabrication and maintenance shops. The medium-grade aluminum oxide grain delivers a controlled cut rate suitable for blending, deburring, and light stock removal without loading or smearing the workpiece surface. A high-loft polyester backing provides flexibility across contoured surfaces.

This disc is suited for use on 300 and 400 series stainless steel, hard and soft carbon steels, tool steels, titanium, super alloys, and fiberglass or composite panels. Typical install scenarios include weld seam blending, pre-inspection surface prep, and final finishing passes on fabricated components. It mounts to die grinders, handheld disc sanders, inline grinders, and straight grinders equipped with a Type R or TR quick-change arbor. The flexible backing conforms to irregular surfaces, reducing the risk of uneven material removal on curved workpieces.

Key Features

• Aluminum oxide abrasive grain for higher cut rate on ferrous and non-ferrous metals
• High-loft nylon fiber construction extends disc service life
• Clean Bond resin technology minimizes smearing and loading on finished surfaces
• Flexible polyester backing conforms to contoured and irregular workpiece geometry
• Power-Lock Type 3 (TR/Type III) attachment for tool-free disc changes
• 20,000 RPM maximum rating compatible with standard die grinder speeds

Compatibility

Designed for use with die grinders, handheld disc sanders, inline grinders, and straight grinders equipped with a Type R or TR (Type III) quick-change arbor system. Suitable for material applications including 300 Series Stainless, 400 Series Stainless, fiberglass and composites, hard carbon steels, soft carbon steels, super alloys, titanium, and tool steels.

Installation Notes

Installation is performed by fabricators, machinists, and maintenance technicians using standard quick-change arbor tooling. Before mounting or removing the disc, power down and disconnect the grinder from its air or electrical supply. Confirm the tool's free-speed RPM rating does not exceed the 20,000 RPM disc limit before operating. Inspect the disc for tears or delamination prior to each use and replace if any damage is found.