Merit Abrasives 69957399728 Quick-change Disc 320 Grit 3in

Product Description

The MERIT ABRASIVES 69957399728 is a coated quick-change abrasive disc designed for use with Power-Lock Type 3 (TR/Type III) handheld disc sanders. The disc measures 3 inches in diameter and carries a 320-grit aluminum oxide abrasive, placing it in the extra fine grade category. It is built on a rigid Y-weight 2-ply polyester backing, which adds structural durability and supports a faster cut rate compared to lighter backings. Rated to 20,000 RPM, this disc suits high-speed finishing and detail work on metal surfaces. Licensed HVAC, industrial, and metalworking professionals install and use this disc for deburring, cleaning, and surface detailing.

This disc is suited for work on 300 series stainless steel, brass, bronze, hard carbon steels, soft carbon steels, and titanium. The aluminum oxide abrasive compound provides consistent cutting action across these materials. The extra fine 320-grit rating makes it most appropriate for final-pass deburring, light cleaning, and surface detailing rather than aggressive stock removal. It attaches via a Type R attaching system and is compatible with handheld disc sanders accepting TR (Type III) quick-change fittings. Sold individually with a minimum order quantity of 50 units per order.

Key Features

• 320-grit aluminum oxide abrasive rated extra fine for finish deburring and detailing
• Y-weight 2-ply polyester backing provides rigidity and extended disc life
• Power-Lock Type 3 (TR/Type III) quick-change compatibility with Type R attaching system
• Rated to 20,000 RPM for use with high-speed handheld disc sanders
• Compatible material applications include stainless steel, brass, bronze, soft and hard carbon steels, and titanium
• Brown disc color, black button; Series R766

Compatibility

Compatible with handheld disc sanders using TR (Type III) quick-change fittings and Type R attaching systems. Suitable for use on 300 series stainless steel, brass, bronze, hard carbon steels, soft carbon steels, and titanium workpieces.

Installation Notes

Installation is performed by metalworking, fabrication, or maintenance trade professionals using a compatible handheld disc sander. Confirm the sander spindle accepts the Type R attaching system before mounting the disc. Always verify the tool RPM rating does not exceed the disc maximum of 20,000 RPM before operation. Inspect the disc for damage before each use and replace if any delamination or wear is observed.