Abrasive Fiber Disc 3M 987C 115×22 mm, grit 80+, pack of 25

3M 987C abrasive fiber discs, 115×22 mm with grit 80+, are fiber-backed grinding and finishing discs designed for controlled material removal and reliable surface preparation on metal, wood and composite substrates. Supplied in a pack of 25, these discs fit angle grinders with a 22 mm arbor and deliver consistent performance for fabrication and repair tasks that require moderate cut rate combined with a uniform finish.

Advantages

The fiber backing ensures dimensional stability and durable support during aggressive grinding, while the 80+ grit provides a balance between material removal rate and achievable surface smoothness. These discs offer extended life under typical trade use thanks to the abrasive formulation and consistent grain distribution. Their standard 115 mm diameter and 22 mm arbor compatibility make them easy to mount on common handheld angle grinders used in workshops and job sites.

Suitable for

• Grinding and shaping mild to medium steel and other metals
• Surface preparation before welding, painting or coating
• Removing rust, scale and old paint layers
• Shaping and smoothing wood and composite materials
• General fabrication, automotive repair and maintenance

Key specifications

• Disc diameter: 115 mm
• Arbor hole diameter: 22 mm
• Abrasive type: fiber-backed grinding disc
• Grit size: 80+
• Pack quantity: 25 discs
• Compatible tool: handheld angle grinder with 22 mm arbor

How to use

Inspect the angle grinder, backing flange and safety guard before mounting the disc. Securely fit the 115×22 mm fiber disc onto the 22 mm arbor and tighten according to the tool manufacturer’s instructions. Start the grinder at a reduced speed to check disc balance, then proceed at the recommended operating speed for the disc and material. Use steady, even pressure and keep the disc moving across the work surface to avoid localized overheating or gouging. Replace discs when abrasive wear reduces cutting efficiency or when the backing is damaged.

Recommendations

Use appropriate personal protective equipment including eye and face protection, hearing protection, and gloves. Match the grit and disc type to the task: 80+ grit is suitable for medium material removal and surface blending. Avoid excessive side pressure beyond the disc’s intended application and follow the angle grinder manufacturer’s speed and safety guidelines.