Merit Abrasives 69957399691 Quick-change Disc 240 Grit

Product Description

The MERIT ABRASIVES 69957399691 is a 1-inch quick-change abrasive disc rated for use with TR (Type III) and Type R attaching systems. It runs on aluminum oxide abrasive bonded to a two-ply X-weight polyester backing, making it rigid and resistant to loading under continuous use. At 240 grit, it falls in the very fine grade range, suited for finishing passes, light deburring, surface cleaning, and detail work. Maximum operating speed is 40,000 RPM. This disc is sold individually but carries a minimum order quantity of 100 units, making it a shop-consumable item for trade professionals running handheld disc sanders in metalworking applications.

This disc is designed for handheld disc sander use on a range of metals including 300 series stainless steel, brass, bronze, hard carbon steels, soft carbon steels, and titanium. The very fine 240-grit cut makes it appropriate for final deburring, light cleaning, and surface detailing where aggressive material removal is not the goal. The brown coated cloth surface and polyester backing in the R766 series are formulated to extend disc life while maintaining a consistent cut rate across these material types.

Key Features

• 240-grit aluminum oxide abrasive — very fine grade for finishing and detailing
• TR (Type III) quick-change compatibility with Type R attaching system
• X-weight two-ply polyester backing for rigidity and extended disc life
• 40,000 RPM maximum operating speed
• Suitable for 300 series stainless, brass, bronze, hard and soft carbon steels, and titanium
• R766 series coated construction with brown disc color and black button

Compatibility

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

Installation Notes

Installation and disc changes should be performed by a qualified technician with the tool fully powered down and disconnected from its power source. Verify that the tool spindle speed does not exceed the 40,000 RPM maximum rating before mounting the disc. Inspect the disc for damage before each use and discard any disc that shows cracks, tears, or delamination. Follow applicable ANSI and OSHA standards for abrasive wheel safety during mounting and operation.