Merit Abrasives 69957399678 Quick-change Disc 180 Grit

Product Description

The MERIT ABRASIVES 69957399678 is a quick-change abrasive disc engineered for fast material removal and fine finishing on metal and composite surfaces. Using a Power-Lock Type R attaching system, it mounts and releases quickly without tools, reducing downtime during disc changes. The disc is constructed with aluminum oxide abrasive grain bonded to a rigid polyester backing, delivering consistent cut at 180 grit for very fine surface preparation. At 0.75 inches in diameter, this compact disc is designed for tight-radius work, weld seam blending, and detail grinding where larger discs cannot reach. Rated to 40,000 RPM, it is suitable for high-speed die grinders and rotary tools used in fabrication and finishing applications.

This disc is used in metalworking, fabrication shops, and maintenance environments where precise surface finishing is required in confined areas. The small 0.75-inch diameter makes it effective for deburring, light stock removal, and surface conditioning on welds, ports, and tight contours. It is typically installed and operated by machinists, pipefitters, sheet metal workers, and general fabrication technicians. The brown cloth-backed construction provides durability through repeated passes on ferrous and non-ferrous metals.

Key Features

• Power-Lock Type R attaching system for tool-free disc changes on compatible quick-change mandrels
• 180 grit aluminum oxide abrasive for very fine material removal and surface finishing
• Rigid polyester backing maintains disc shape and consistent contact on curved surfaces
• 40,000 RPM maximum speed rating suitable for high-speed rotary and die grinder use
• Compact 0.75-inch diameter designed for restricted access, detail work, and tight-radius applications
• Series R766 construction with brown disc color for quick visual grit identification

Compatibility

Designed for use with quick-change mandrels that accept the Power-Lock Type R attaching system, commonly found on die grinders and rotary tools used in fabrication and metalworking applications.

Installation Notes

Installation and operation should be performed by qualified personnel familiar with abrasive tool safety practices. Verify the tool spindle speed meets or exceeds the disc maximum RPM rating before mounting. Inspect the disc for damage before each use and ensure the quick-change mandrel is rated for the Type R attaching system. Always wear appropriate PPE including eye protection and gloves when operating rotary abrasive tools.