Abrasive Brush Disc 3M 24537, bristle disc K.50, M14 arbor, 115 mm diameter

3M Abrasive Brush Disc 24537 is a bristle-style abrasive disc with K.50 grit, designed for surface finishing and light stock removal. The 115 mm diameter disc mounts on an M14 arbor for use with compatible angle grinders. Its flexible bristle construction conforms to contours while providing controlled abrasion, making it useful for deburring, cleaning, blending welds and preparing metal and other surfaces before painting or coating.

Advantages

The bristle disc combines abrasive grains with flexible filaments to deliver consistent material removal without aggressive gouging. Its medium-coarse K.50 grit balances cutting rate and surface finish, reducing the need for follow-up sanding in many cases. The disc’s construction allows it to access irregular shapes and contours, and the M14 arbor compatibility makes it convenient to fit to a wide range of handheld angle grinders. Overall, the tool offers predictable performance for finishing tasks where controlled abrasion and conformability are required.

Suitable for (tasks / use cases)

• Deburring edges on metal parts
• Cleaning rust, scale and light oxidation
• Blending weld seams and smoothing weld transitions
• Surface preparation before painting, powder coating or sealing
• Light material removal on irregular or contoured surfaces

Key specifications

• Disc type: bristle-style abrasive (bristle disc)
• Abrasive grit: K.50 (medium-coarse)
• Diameter: 115 mm
• Arbor/thread: M14 compatible
• Intended use: surface finishing, deburring, blending, cleaning
• Material compatibility: metal and various other substrate surfaces

How to use

Mount the abrasive brush disc on a properly rated angle grinder with an M14 arbor following the grinder manufacturer’s instructions. Ensure the grinder is unplugged or its battery removed during installation. Use appropriate rotational speed within the disc’s recommended range and apply light to moderate pressure; allow the bristles to do the cutting rather than forcing the tool. Work across the surface with steady, overlapping passes and keep the tool moving to avoid concentrated heat or excessive material removal. Regularly inspect the disc for wear and replace when bristles are excessively worn or performance diminishes.

Usage recommendations

Always wear suitable personal protective equipment: safety goggles or face shield, gloves, hearing protection and protective clothing. Use a dust mask or respirator when working with materials that generate hazardous dust. Match disc grit and type to the task—choose K.50 for medium-coarse finishing and light stock removal. Store discs in a dry environment away from extreme temperatures and humidity to maintain performance.