Merit Abrasives 69957399692 Quick-change Disc 320 Grit

Product Description

The MERIT ABRASIVES 69957399692 is a 1-inch quick-change coated abrasive disc designed for use with Power-Lock Type R attachment systems. It features a 320-grit aluminum oxide abrasive bonded to a rigid polyester backing, placing it in the extra fine grade range. The disc spins safely up to 40,000 RPM, making it suited for high-speed rotary tools and die grinders. Its compact 1-inch diameter targets precision material removal, surface prep, and finishing in tight or contoured areas. Licensed tradespeople and fabricators working with metal, composites, or finish surfaces will find this disc appropriate for controlled, fine-grade work.

This disc is built for applications requiring fine surface finishing rather than aggressive stock removal. The rigid polyester backing provides dimensional stability during operation, which helps maintain consistent contact on flat or slightly curved workpieces. Typical use cases include deburring, light blending, and surface conditioning on metal components in maintenance, fabrication, and production environments. The Type R quick-change mount allows fast disc swaps without tools, reducing downtime during repetitive finishing operations. This SKU ships individually and is ordered in minimum quantities of 100 units.

Key Features

• 320-grit extra fine aluminum oxide abrasive for controlled surface finishing
• Rigid polyester backing provides consistent contact and dimensional stability
• Power-Lock Type R quick-change attachment for tool-free disc changes
• Rated to 40,000 RPM for use with high-speed rotary and die grinder tools
• Compact 1-inch diameter suited for precision work in tight or contoured areas
• Part of the Merit R766 Series coated abrasive line

Compatibility

Designed for use with Power-Lock Type R quick-change mandrels and holders. Verify that your rotary tool or die grinder accepts Type R quick-change accessories and is rated for a minimum of 40,000 RPM before installing this disc.

Installation Notes

Installation requires a compatible Type R quick-change mandrel mounted in a die grinder or rotary tool. Confirm the tool RPM rating meets or exceeds 40,000 RPM before use, and always inspect the disc for damage before mounting. Wear appropriate eye protection and ensure the workpiece is secure. Follow applicable ANSI B7 abrasive safety standards and the tool manufacturer guidelines during installation and operation.