Merit Abrasives 69957399658 Quick-change Disc 180 Grit 3in

Product Description

The MERIT ABRASIVES 69957399658 is a 3-inch quick-change abrasive disc built for handheld disc sanders in demanding metalworking applications. It uses aluminum oxide grain on a rigid, X-weight 2-ply polyester backing that resists tearing and maintains cut rate through extended use. The Type S Power-Lock attachment system seats and releases quickly without tools, keeping downtime low during disc changes. Rated to 20,000 RPM, it handles high-speed grinders safely. At 180 grit, it falls in the very fine range, making it well suited for deburring edges, cleaning weld seams, and finish detailing on metal surfaces. Licensed HVAC, fabrication, and metal finishing technicians working on precision components will find this disc size and grit combination practical for tight-clearance work.

This disc is designed for use on 300 series stainless steel, brass, bronze, hard carbon steels, soft carbon steels, and titanium. The aluminum oxide abrasive performs consistently across this range of materials, making it a shop staple where multiple alloys are worked in a single session. The 3-inch diameter fits compact handheld disc sanders commonly used in HVAC fabrication, plumbing rough-in, and general metal prep. The brown coated cloth face and rigid backing resist loading on softer metals and maintain a consistent scratch pattern on harder alloys.

Key Features

• 180 grit aluminum oxide abrasive for very fine deburring, cleaning, and detailing
• Rigid X-weight 2-ply polyester backing resists tearing under load
• Type S Power-Lock quick-change attachment for tool-free disc swaps
• 20,000 RPM maximum speed rating for high-speed handheld disc sanders
• Compatible with 300 series stainless, brass, bronze, hard and soft carbon steels, and titanium
• Brown coated face resists loading on soft and hard metals alike

Compatibility

Designed for use with handheld disc sanders equipped with a Type S Power-Lock quick-change spindle. Suitable for metalworking applications on 300 series stainless steel, brass, bronze, hard carbon steels, soft carbon steels, and titanium per manufacturer specification.

Installation Notes

Mounting and disc changes are performed by hand using the Type S Power-Lock interface — no tools required. Before mounting, inspect the backing pad for damage and confirm the spindle speed rating meets or exceeds 20,000 RPM. Always power down and disconnect the sander from its power source before changing discs. Wear appropriate eye protection and follow ANSI B7.1 guidelines for abrasive disc use.