Merit Abrasives 69957399772 Quick-change Disc 320 Grit

Product Description

The MERIT ABRASIVES 69957399772 is a coated quick-change disc designed for use with Power-Lock Type 1 attachment systems. It measures 1.5 inches in diameter and carries a 320-grit aluminum oxide abrasive, placing it in the extra fine grade range. The polyester backing is rigid and rated to 30,000 RPM, making it suitable for high-speed rotary tools and die grinders. The disc is intended for precision finishing, light deburring, and surface prep work in metal fabrication, maintenance, and general shop applications. Typical installers and end users include machinists, fabricators, and maintenance technicians.

This disc fits compact rotary and die grinder applications where a quick-change Power-Lock Type P attachment is used. The 1.5-inch diameter suits work in tight areas or on small workpieces where a full-size disc would be impractical. The 320-grit extra fine aluminum oxide abrasive is appropriate for final-pass finishing on ferrous and non-ferrous metals, as well as light blending of surface irregularities before coating or inspection. The brown cloth-backed, rigid construction holds its profile under load without flexing.

Key Features

• 320-grit aluminum oxide abrasive rated extra fine for finish-pass surface work
• Power-Lock Type P (Type 1) quick-change attachment for tool-free disc swaps
• Rigid polyester backing maintains consistent contact geometry under load
• 30,000 RPM maximum rated speed compatible with standard die grinders
• 1.5-inch diameter sized for confined areas and small-part finishing
• Series R766 coated abrasive construction with brown disc color and black button

Compatibility

Designed as a replacement or consumable for die grinders and rotary tools equipped with a Power-Lock Type P quick-change mandrel accepting 1.5-inch coated abrasive discs.

Installation Notes

Ensure the die grinder or rotary tool is unplugged or the air supply is disconnected before mounting or removing the disc. Verify the tool's free-speed RPM rating does not exceed the 30,000 RPM maximum rated speed of this disc before use. Inspect the disc for damage before each use and discard any disc that shows cracking, tearing, or delamination. Follow applicable ANSI B7.1 and shop safety guidelines for abrasive wheel mounting and operation.