Merit Abrasives 69957399684 Quick-change Disc 1 in 50 Grit

Product Description

The MERIT ABRASIVES 69957399684 is a coated quick-change abrasive disc designed for use with Power-Lock Type 3 (TR/Type III) attaching systems. At 1 inch in diameter, this disc carries a 50-grit aluminum oxide abrasive grain on a rigid polyester backing, placing it in the coarse grade category. It is rated to 40,000 RPM, making it suitable for high-speed rotary tools and die grinders used in metal fabrication, weld preparation, and surface conditioning work. Licensed trades including pipefitters, ironworkers, and general sheet-metal mechanics routinely use discs of this type for deburring, blending, and light material removal in tight-access areas.

This disc is intended for use in applications where a small-diameter, high-speed abrasive is needed in confined or precision locations. Typical scenarios include weld seam cleanup, spot deburring on ferrous and non-ferrous metals, and surface prep prior to coating or inspection. The coarse 50-grit rating removes material aggressively without loading quickly on clean metal surfaces. It is sold as a single disc with a minimum order quantity of 100 units, making it suited for shop stocking or production-line abrasive replenishment programs.

Key Features

• 50-grit aluminum oxide abrasive for aggressive coarse-grade material removal
• 1-inch disc diameter designed for tight-access and precision grinding locations
• Rigid polyester backing provides consistent cut and disc stability at speed
• Rated to 40,000 RPM for compatibility with high-speed die grinders and rotary tools
• TR (Type III) Power-Lock attaching system for tool-free disc changes
• Series R766 coated disc construction with brown disc color and black button

Compatibility

Compatible with quick-change tool holders and mandrels using the TR (Type III) Power-Lock Type 3 attaching system, as stated in the product specifications. Fits standard 1-inch quick-change disc mandrels rated for high-speed rotary and die grinder use.

Installation Notes

Installation is performed by a qualified tradesperson using an appropriate TR-compatible quick-change mandrel secured in a die grinder or rotary tool. Verify the tool spindle speed does not exceed the 40,000 RPM disc rating before operation. Always inspect the disc for cracks or damage before mounting, and ensure the locking button is fully engaged before applying the disc to the workpiece. Eye protection and appropriate PPE are required per OSHA and shop safety standards.