3M 7100138294 Radial Bristle Brush 2in 120 Grit Ceramic

Product Description

The 3M 7100138294 is a radial bristle brush designed for surface conditioning, deburring, blending, and light material removal on metal and other hard surfaces. It uses a ceramic abrasive at 120 grit, placing it in the fine grade category for controlled surface finishing work. The brush measures 2 inches in outside diameter with a 3/8-inch thickness and accepts a plain arbor connection with a 3/8-inch arbor hole. It is rated for a maximum of 30,000 RPM, making it compatible with die grinders and rotary tools commonly used by machinists, metal fabricators, and maintenance technicians.

This brush is suited for precision surface prep tasks including weld blending, rust and scale removal, edge finishing, and cleaning of tight contours or irregular profiles. The radial bristle design allows the tips to flex into recesses and complex geometries where flat abrasive media cannot reach. The TC brush type designation indicates a standard disc configuration used in rotary tool setups across light industrial, maintenance, and fabrication environments. Individual bristles fracture during use to expose fresh ceramic abrasive, maintaining a consistent cut rate throughout the brush life.

Key Features

• Ceramic abrasive at 120 grit delivers fine-grade surface conditioning and blending
• Rated to 30,000 RPM for use with die grinders and high-speed rotary tools
• Plain arbor connection with 3/8-inch arbor hole for straightforward mounting
• 2-inch outside diameter with 3/8-inch brush thickness for compact tool access
• Self-sharpening ceramic bristles expose fresh abrasive as the brush wears
• White brush color aids visual identification of grit grade on the job

Compatibility

Designed for use with die grinders and rotary tools that accept a plain arbor mount with a 3/8-inch arbor hole and support speeds up to 30,000 RPM.

Installation Notes

This brush is installed and serviced by machinists, metal fabricators, and maintenance technicians working with rotary tools. Confirm the tool spindle speed does not exceed the 30,000 RPM maximum rating before operation. Power down and disconnect the tool from any power source before mounting or removing the brush. Eye protection and appropriate PPE should be worn during operation, as ceramic bristle tips and abrasive particles are ejected at high speed.