Merit Abrasives 69957399690 Quick-change Disc 180 Grit

Product Description

The MERIT ABRASIVES 69957399690 is a quick-change abrasive disc designed for use with Power-Lock Type R attachment systems on handheld disc sanders. It measures 1 inch in diameter and cuts at 180 grit, placing it in the very fine to fine grade range. The disc is constructed with aluminum oxide abrasive bonded to a rigid, X-weight 2-ply polyester backing, providing durability and a faster cut rate compared to lighter-backed alternatives. With a maximum rated speed of 40,000 RPM, it is built to handle the demands of precision deburring, surface cleaning, and detailing work. Licensed trades and shop fabricators install this disc type for fast, consistent results on tight geometries.

This disc is suited for deburring, cleaning, and detailing applications across a range of metals including 300 Series stainless steel, brass, bronze, hard carbon steels, soft carbon steels, and titanium. Its rigid polyester backing maintains consistent contact on flat and near-flat surfaces. The small 1 inch diameter makes it appropriate for detailed work, edge finishing, and confined areas where larger discs cannot reach. It is used in fabrication, maintenance, and finishing environments where surface condition and dimensional tolerance matter.

Key Features

• 180 grit aluminum oxide abrasive for very fine deburring, cleaning, and surface detailing
• Power-Lock Type R quick-change attachment system for fast disc swaps without additional hardware
• X-weight 2-ply polyester backing rated rigid for consistent, stable cutting contact
• Maximum rated speed of 40,000 RPM compatible with standard handheld disc sanders
• Suitable for 300 Series stainless, brass, bronze, hard carbon steels, soft carbon steels, and titanium
• Series R766 construction with coating applied over backing for extended disc life

Compatibility

Designed for use with handheld disc sanders equipped with a Power-Lock Type R quick-change hub. Rated for material applications including 300 Series stainless steel, brass, bronze, hard carbon steels, soft carbon steels, and titanium.

Installation Notes

Installation is performed by pressing the disc onto a compatible Type R quick-change mandrel until it locks securely. Confirm the tool spindle speed does not exceed the 40,000 RPM disc rating before operation. Always inspect the disc for damage, delamination, or wear before mounting. Wear appropriate PPE including eye protection and gloves when operating handheld abrasive tools.