Abrasive Bristle Brush Disc 3M K120 115×22 mm for Surface Finishing

The Abrasive Bristle Brush Disc 3M K120 115×22 mm for Surface Finishing is a powered abrasive accessory designed for controlled material removal, edge blending and surface preparation. The disc features K120 grit abrasive bristles arranged radially on a 115 mm diameter body with a 22 mm bore suited to common angle grinder spindles or compatible backing pads. It is intended for light deburring, cleaning welds, removing rust or paint, and producing a uniform finish on metal, wood and composite substrates without aggressive gouging.

Advantages

The K120 abrasive bristles provide consistent, fine-cut performance that balances material removal and surface blending. The flexible bristle construction allows the disc to conform to contours and edges, reducing the likelihood of localized gouging while maintaining access to tight areas. The 115×22 mm size offers a compact working profile for handheld angle grinders and small backing pads, and the open bristle design helps clear debris for longer effective life.

Suitable for

• Light deburring of stamped or machined parts
• Cleaning and blending weld seams
• Feathering rust or old paint prior to repainting
• Surface finishing on thin or contoured metal and composite panels
• Preparing substrates before coating or adhesive bonding

Key specifications

• Abrasive grit: K120 (fine)
• Diameter: 115 mm
• Bore diameter: 22 mm
• Design: Radial abrasive bristle brush disc
• Compatible tools: Handheld angle grinders or backing pads with matching arbor
• Suitable materials: Metal, wood, composites

How to use

Mount the disc on a compatible angle grinder or backing pad ensuring the 22 mm bore and spindle match and that the tool is disconnected from power while fitting. Start the tool at low speed, then increase to the recommended operating speed for the disc and the tool. Hold the grinder with steady, even pressure and move the disc across the workpiece with light overlapping passes. For best results, maintain consistent motion to avoid concentrating heat or removing too much material in one spot. Replace the disc if bristles wear unevenly or performance declines.

Recommendations

Use appropriate personal protective equipment including eye protection, hearing protection and gloves. Test on a scrap area to verify finish and material removal rate before working on the final part. Avoid excessive force and prolonged dwell in one area to prevent heat buildup and substrate distortion.