3M 7100138299 Radial Bristle Brush 220 Grit Ceramic

Product Description

The 3M 7100138299 is a radial bristle brush designed for surface finishing, deburring, and blending on metal and other industrial materials. The brush uses ceramic abrasive bristles rated at 220 grit for very fine material removal and surface refinement. At 6 inches in outside diameter and 7/16 inch in thickness, it mounts to standard arbor-style machinery via a 1-inch plain arbor hole. Maximum operating speed is 6,000 RPM. This brush is intended for use by machinists, fabricators, and metalworking tradespeople who need consistent, controlled surface finishing on a power tool setup.

This radial bristle brush is suited for light deburring, edge blending, and surface preparation on ferrous and non-ferrous metals in fabrication, maintenance, and production environments. The red color coding identifies the very fine ceramic grade within the 3M radial bristle product line. It is commonly used on bench grinders, die grinders, or similar arbor-driven equipment. The 7/16-inch brush thickness allows access to contoured or tight areas while maintaining consistent contact pressure across the work surface.

Key Features

• Ceramic abrasive bristles provide consistent cut rate and long service life on metal surfaces
• 220 grit very fine grade for surface finishing and light deburring without aggressive material removal
• 6-inch outside diameter with 7/16-inch thickness for broad surface contact and detail work
• 1-inch plain arbor hole connection for direct mounting on standard arbor-driven equipment
• 6,000 RPM maximum rated speed for safe operation on compatible power tools
• Red color coding for quick grade identification in a multi-brush shop setup

Compatibility

Designed for use with arbor-driven power tools accepting a 1-inch plain arbor connection and rated to accommodate 6,000 RPM operation. Verify that the host tool arbor speed does not exceed the maximum RPM rating before mounting.

Installation Notes

Installation should be performed by a qualified machinist or tradesperson familiar with abrasive wheel mounting procedures. Power down and lock out the machine before mounting or removing the brush. Confirm the arbor speed rating of the host equipment does not exceed 6,000 RPM. Wear appropriate eye protection and follow applicable ANSI B11 or OSHA abrasive wheel safety standards during use.