Merit Abrasives 69957399674 Quick-change Disc 80 Grit

Product Description

The MERIT ABRASIVES 69957399674 is a coated quick-change abrasive disc designed for fast material removal and surface finishing on metal workpieces. It uses an aluminum oxide abrasive grain bonded to a rigid, X-weight two-ply cloth and polyester backing, which resists tearing under load at up to 40,000 RPM. At 0.75 inches in diameter and 80 grit, this disc is sized for detailed work in tight spaces. The Type R attaching system and TR (Type III) quick-change compatibility allow fast disc swaps on handheld disc sanders without tools. Licensed tradespeople and fabricators use it for deburring, cleaning, and detailing operations on a range of metals.

This disc is suited for use on 300 and 400 series stainless steel, aluminum, brass, bronze, hard and soft carbon steels, and titanium. Its compact 0.75-inch diameter makes it effective for accessing contoured surfaces, weld seams, and small part geometry where a larger disc cannot maneuver. It is intended for handheld disc sander applications in both shop and field environments. The medium-grade aluminum oxide grain provides controlled stock removal without aggressive gouging, making it a practical choice for finishing and detailing rather than heavy grinding passes.

Key Features

• Aluminum oxide abrasive grain rated at 80 grit for medium-grade material removal
• Rigid X-weight two-ply cloth and polyester backing resists tearing at high RPM
• Rated for up to 40,000 RPM maximum operating speed
• TR (Type III) quick-change compatibility with Type R attaching system for tool-free disc changes
• Compact 0.75-inch disc diameter suited for tight clearance and detail work
• Compatible with multiple metal types including stainless steel, aluminum, titanium, and carbon steels

Compatibility

Compatible with handheld disc sanders equipped with a TR (Type III) or Type R quick-change interface. Rated for use on 300 series stainless, 400 series stainless, aluminum, brass, bronze, hard carbon steels, soft carbon steels, and titanium.

Installation Notes

Installation and disc changes should be performed with the sander powered off and disconnected from its power source. Verify that the tool spindle speed does not exceed the 40,000 RPM disc rating before use. Inspect the disc and backing for damage prior to each use and discard any disc that shows cracking, delamination, or worn-through abrasive. Personal protective equipment including eye protection and gloves is standard practice when operating abrasive disc tools.