Abrasive Fibre Disc 3M Cubitron III 1187C 125x22mm 36+ (pack of 25) slotted

3M Cubitron III 1187C abrasive fibre disc, 125 x 22 mm, grit 36+, supplied in a pack of 25. This slotted fibre disc is engineered for use with angle grinders and is intended for aggressive material removal on metal and steel, weld preparation and surface blending. The disc combines a ceramic mineral abrasive structure with a fibre backing to deliver consistent stock removal while maintaining disc shape and durability for workshop, fabrication and maintenance tasks.

Advantages

The 3M Cubitron III abrasive geometry provides faster cutting and longer life compared with conventional abrasives of similar grit. The slotted fibre backing improves heat dissipation and reduces clogging, enabling sustained performance during extended grinding sessions. The 125 mm size with 22 mm centre hole fits common small grinders, and the pack of 25 ensures readiness for repetitive industrial or trade use. The design is suitable for achieving uniform surface finish and controlled material removal on ferrous metals.

Suitable for (tasks / use cases)

• Aggressive stock removal on steel and iron
• Weld seam preparation and weld blending
• Surface cleaning and rust removal in metal fabrication
• Workshop grinding and maintenance tasks with angle grinders

When it may not be suitable

This slotted fibre disc is designed specifically for metalworking and is not intended for precision finishing on delicate materials, painted surfaces where minimal material removal is required, or for use on non-ferrous soft metals when a finer finish is necessary. For applications requiring fine polishing, non-abrasive cleaning, or work on wood, ceramics, or plastics, alternative abrasives or polishing products should be selected.

Key specifications

• Diameter: 125 mm
• Centre hole diameter: 22 mm
• Grit: 36+
• Disc type: slotted abrasive fibre disc
• Backing: fibre with ceramic mineral abrasive
• Pack quantity: 25 discs
• Typical applications: metal grinding, weld preparation, surface blending

How to use

Mount the disc securely onto a compatible angle grinder with a 22 mm arbor and ensure the tool is disconnected from power during fitting. Use appropriate grinding guards and follow the grinder manufacturer’s mounting instructions. Operate at the grinder’s recommended RPM for 125 mm discs and apply steady, controlled pressure—avoid excessive force which can reduce disc life and increase heat. Maintain a suitable grinding angle for the task: a flatter angle for surface blending and a steeper angle for more aggressive stock removal. Replace discs when worn, torn, or if the backing is compromised.

What to consider before purchase

• Confirm compatibility with your angle grinder’s arbor and maximum disc diameter.
• Assess whether grit 36+ is appropriate for the required finish and material.
• Consider pack size (25) relative to expected consumption and storage.
• Ensure availability of suitable personal protective equipment (PPE) and grinding guards.

Usage recommendations

Use eye, face and hand protection, and work in a well-ventilated area. Allow the disc to cool between prolonged passes to reduce heat buildup. For best results on welds and heavy stock removal choose firm, even strokes and replace discs showing significant wear.