Abrasive fibre discs 3M 7100349590, 125 mm diameter, pack of 25

3M abrasive fibre discs 125 mm (pack of 25) are non-woven surface conditioning discs engineered for blending, deburring and finishing on metal and a variety of other substrates. Designed to deliver consistent abrasive performance, these discs work with compatible 125 mm backing pads and angle grinders to prepare surfaces before painting, remove light weld spatter, smooth edges and create uniform finishes without aggressive stock removal.

Advantages

These non-woven fibre discs provide uniform abrasion and controlled cut, reducing the risk of gouging while delivering a consistent surface texture. The discs are durable for repeated use in workshop and industrial environments and are suitable for use on painted surfaces, bare metal and composites. Their 125 mm diameter size fits common backing pads, making them easy to integrate into existing tool setups.

Suitable for

• Surface preparation before painting or coating
• Blending weld seams and removing weld spatter
• Deburring edges and removing light rust or oxidation
• Finishing and matting surfaces to a consistent texture
• General metalworking and fabrication touch-up tasks

When it may not be suitable

These fibre discs are intended for surface conditioning and light to moderate material removal; they are not designed for heavy stock removal or rapid metal cutting. For aggressive grinding tasks, flap discs or dedicated grinding wheels with a higher abrasive grit and rigid structure are more appropriate. Also, ensure disc compatibility with the speed rating of your backing pad and angle grinder before use.

Key specifications

• Disc type: non-woven abrasive fibre disc for surface conditioning
• Diameter: 125 mm
• Quantity: 25 discs per pack
• Intended use: blending, deburring, finishing on metal and other substrates
• Compatible with: 125 mm backing pads and standard angle grinders

How to use

Mount the disc on a compatible 125 mm backing pad that is rated for the grinder's speed and check that the disc is securely attached. Operate the angle grinder at the recommended speed while applying light, even pressure—allow the non-woven material to do the work rather than forcing the tool. Move the disc steadily across the workpiece to achieve uniform blending or finishing; avoid holding the disc in one spot to prevent uneven wear or local overheating.

What to consider before purchase

• Confirm compatibility with your 125 mm backing pad and angle grinder speed rating
• Assess whether non-woven surface conditioning is appropriate versus aggressive grinding
• Choose pack quantity according to job frequency — this product contains 25 discs
• Consider safety equipment: eye protection, gloves and respiratory protection where dust is produced

Usage recommendations

For consistent results, start with a light pass to evaluate cutting action and progress to additional passes as needed. Replace discs if they become clogged, torn or unevenly worn. Store in a dry environment away from direct sunlight to preserve disc performance.