Sanding discs 3M 39066, 150 mm diameter, pack of 50

3M 39066 sanding discs, 150 mm in diameter and supplied in a pack of 50, are abrasive discs designed for general surface preparation and sanding tasks. They are intended for use on wood, paint and varnish layers, and on metals where the abrasive is compatible. The discs feature a hook-and-loop attachment format and are suitable for orbital and random-orbit sanders with a matching backing pad. The product aims to deliver consistent abrasive performance for material removal and surface finishing in professional and DIY environments.

Advantages

These 150 mm sanding discs provide uniform grit distribution to maintain consistent cutting and finish. The hook-and-loop design enables quick disc changes and secure attachment to compatible backing pads. Supplied as a pack of 50, the discs offer a practical balance between supply and storage for job sites or workshops. Their construction supports efficient sanding of wood, painted and varnished surfaces, and appropriate metal applications when used with the right technique and equipment.

Suitable for

• Sanding and leveling wooden surfaces
• Removing or abrading paint and varnish layers
• Surface preparation before painting or coating
• Light to medium metal deburring and finishing where compatible
• Use with orbital and random-orbit sanders that accept 150 mm hook-and-loop discs

Key specifications

• Disc diameter: 150 mm
• Attachment type: hook-and-loop (Velcro-style)
• Pack quantity: 50 discs
• Intended materials: wood, paint and varnish layers, compatible metals
• Compatible tools: orbital and random-orbit sanders with 150 mm backing pad

How to use

Fit a matching 150 mm hook-and-loop backing pad to the orbital sander and ensure the tool is switched off and unplugged before attaching a disc. Align the disc with the backing pad and press firmly to secure. Start sanding using light to moderate pressure, allowing the sander and abrasive to do the work; avoid excessive force that can cause premature wear or uneven sanding. Replace discs when abrasive cutting becomes ineffective or when the surface finish no longer meets requirements. Follow the sander manufacturer's instructions for safe operation, and wear appropriate personal protective equipment such as dust mask, eye protection and hearing protection.

Usage recommendations

For optimal results, select a grit grade appropriate to the task (coarser grits for rapid material removal, finer grits for smoothing). Use consistent, overlapping passes and maintain steady tool movement to avoid gouging. When working on metals, verify abrasive compatibility and consider cooling intervals to prevent overheating. Store discs flat in a dry environment to preserve adhesive and abrasive properties.