3M 7100138178 Radial Bristle Brush 3 in 120 Grit

Product Description

The 3M 7100138178 is a radial bristle brush designed for surface preparation, deburring, blending, and finishing on metal and other hard surfaces. The brush uses a ceramic abrasive material rated at 120 grit for fine-grade material removal. Its 3-inch outside diameter and Type R Quick-Change arbor connection make it compatible with standard rotary tools and die grinders used in HVAC fabrication, plumbing rough-in, and general trade metalwork. Rated to 25,000 RPM, it handles high-speed applications without bristle separation. Installers and fabricators use this brush to clean weld seams, prep pipe ends, and blend surface transitions before assembly or coating.

This radial bristle brush is suited for trade professionals working on metal surface prep in HVAC ductwork fabrication, pipe fitting, and electrical enclosure work. The fine 120-grit ceramic abrasive removes light burrs, mill scale, and oxidation without aggressive stock removal. The Type R Quick-Change arbor allows fast tool changes on compatible rotary platforms. It is sold as a single unit and is appropriate for bench grinder setups or handheld die grinders used in shop and field environments.

Key Features

• Ceramic abrasive material provides consistent, long-lasting cut on metal surfaces
• 120-grit fine grade suited for light deburring, blending, and surface finishing
• 3-inch outside diameter fits standard rotary and die grinder applications
• Rated to 25,000 RPM for high-speed tool compatibility
• Type R Quick-Change arbor connection for fast, tool-free disc swaps
• White brush color for easy visual identification of fine-grade tooling

Compatibility

Designed for use with Type R Quick-Change rotary tool systems accepting 3-inch radial bristle disc accessories.

Installation Notes

Installation and operation should be performed by qualified trade personnel familiar with rotary abrasive tool safety. Confirm the tool spindle speed does not exceed the 25,000 RPM maximum rating before use. Wear appropriate PPE including eye protection and gloves when operating rotary abrasive tools. Follow the tool manufacturer's guidelines for mounting Type R Quick-Change accessories to avoid disc separation during operation.