Merit Abrasives 69957399679 Quick-change Disc 240 Grit

Product Description

The MERIT ABRASIVES 69957399679 is a quick-change coated abrasive disc designed for use with Power-Lock Type R attaching systems. At 3/4 inch in diameter and rated at 40,000 RPM, this disc delivers controlled material removal in tight or hard-to-reach areas where larger discs cannot fit. The abrasive material is aluminum oxide bonded to a rigid polyester backing with a Y-weight cloth construction. The 240 grit rating places it in the very fine grade range, making it well suited for finishing passes, light deburring, and surface prep work. Sold individually with a minimum order quantity of 100 units.

This disc is used across metal fabrication, maintenance, and finishing applications where a quick-change rotary setup is standard. The small 3/4 inch diameter is especially practical for grinding or blending in confined weld joints, narrow channels, and contoured surfaces. Machinists, fabricators, and maintenance technicians working with die grinders or rotary tools equipped with a Type R quick-change mandrel will find this disc fits standard production workflows. The rigid backing maintains disc geometry under load, which helps produce consistent finish results across a surface.

Key Features

• 240 grit aluminum oxide abrasive for very fine material removal and surface finishing
• Type R Power-Lock quick-change attaching system for fast disc swaps without tools
• Rigid polyester Y-weight backing maintains disc shape under rotary load
• Rated to 40,000 RPM for compatibility with high-speed die grinders and rotary tools
• 3/4 inch diameter allows access to confined areas, tight weld joints, and contoured workpieces
• Sold as single disc with 100-unit minimum order quantity for production and shop use

Compatibility

Designed for use with Type R Power-Lock quick-change mandrels and rotary tool setups that accept 3/4 inch quick-change discs rated at or above 40,000 RPM.

Installation Notes

Mount the disc onto a compatible Type R quick-change mandrel seated in a die grinder or rotary tool. Verify the tool's free-speed RPM rating does not exceed the disc's 40,000 RPM maximum before operation. Inspect the disc for cracks or damage before each use and replace immediately if any defect is found. Always wear appropriate eye protection and follow applicable shop safety procedures when operating rotary abrasive tools.