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Product Description
- Adhesive backing for easy attachment
- Durable polyester film backing provides flexibility for consistent finishing on contoured surfaces
- Load-resistant coating prevents dust and debris from clogging the disc
- Open coat construction provides aggressive cut and reduced loading
- Precision, micron-graded aluminum oxide abrasive offers a fast cut, long life, and uniform finish on many substrates
- Pressure sensitive adhesive backing allows quick attachment and clean removal for multi-step finishing processes
We gave these discs an anti-load coating and open coat surface to increase efficiency and product life by minimizing loading. The abrasive is resin-bonded and supports disc flexibility without sacrificing durability and reliable performance under high heat and pressure. To compliment the effective abrasive action, the polyester film backing flexes to help achieve a consistent finish over contours and offers greater tear-resistance than comparable paper products, making it ideal for high-production environments. And the pressure sensitive adhesive (PSA) provides easy attachment, holds the disc securely in place during use, and removes cleanly from the backup pad (sold separately). Designed for use with orbital and random orbital sanders, this disc comes in a range of micron grades for complete multi-step sanding and finishing.
Our 3M™ Microfinishing PSA Film Disc 366L features precision, micron-graded aluminum oxide, which is a popular choice among industrial professionals because of its fast cut-rate and long life. This mineral makes a tough, durable abrasive that self-fractures to expose fresh cutting edges, whereas traditional natural abrasives dull more quickly. Due to its fast cut-rate, hardness, and strength, it is widely used in grinding applications in addition to sanding and finishing applications. Aluminum oxide is suitable for a wide variety of materials in both woodworking and metalworking, including ferrous alloys.
Sanding discs cut better and last longer when dust isn't clogging the cutting surface of the abrasives. Open coat construction means the abrasive grains are placed with space between them to help evacuate sawdust and other sanding debris and avoid clogging the cutting edge of the grains. The load-resistant coating also allows the disc to continue cutting even when sanding softwoods, paints, and other materials that would, otherwise, clog the disc and hinder sanding ability. Additionally, the open coat feature provides a more aggressive cut than a comparable closed coat abrasive of the same grade. All of this adds up to increased productivity and reduced material consumption.
Our 3M™ sanding discs come in a variety of forms to fit various power tools and disc pads. These high-quality abrasive products come ready to use with a pressure sensitive adhesive coating on the backside so they conveniently press on to a backup pad or hand pad, and remove cleanly, leaving an uncontaminated surface for the next sheet or disc.
Trusted 3M Microfinishing Quality
The 3M Microfinishing PSA Film Disc 366L delivers reliable performance with its precision micron-graded aluminum oxide abrasive. This fast-cutting mineral ensures a long life and uniform finish, making it a top choice for professionals. The exact model 366L is part of 3M’s well-known Microfinishing line, guaranteeing consistent results.
Designed for various materials like wood, composites, and metal, this disc supports multi-step finishing processes. Its Type D backing enhances durability and flexibility, allowing it to conform to contoured surfaces without sacrificing performance.
Flexible Durable Polyester Backing
The 5 in x NH polyester film backing offers flexibility that helps maintain consistent finishing on curved or irregular surfaces. This durable backing resists tearing better than paper alternatives, making it ideal for high-production environments. The 3MIL thickness balances strength and flexibility effectively.
Its film backing supports the abrasive’s resin bond, allowing the disc to withstand high heat and pressure during use. This ensures the 3M Microfinishing PSA Film Disc 366L keeps performing reliably over time, even under demanding conditions.
Open Coat Aggressive Cut
The open coat construction spaces abrasive grains to reduce clogging and improve dust evacuation. This design provides a more aggressive cut compared to closed coat abrasives of the same grade, increasing productivity. The 30 Micron (3MIL) grade ensures a fast, efficient sanding process.
Additionally, the load-resistant coating prevents dust and debris buildup, allowing the disc to maintain cutting ability on softwoods, paints, and other clog-prone materials. This feature extends disc life and reduces material waste.
Pressure Sensitive Adhesive Backing
The PSA backing allows quick and secure attachment to backup pads, making disc changes fast and hassle-free. This adhesive also removes cleanly without leaving residue, supporting multi-step finishing workflows. The 3M Microfinishing PSA Film Disc 366L comes in a convenient die 500X format for easy handling.
This adhesive system ensures the disc stays firmly in place during use, preventing slippage and improving sanding consistency. It’s compatible with orbital and random orbital sanders, fitting a wide range of finishing applications.
Large Pack Size Convenience
Available in packs of 50 discs per bag and 500 discs per case, this product suits high-volume users and industrial settings. The bulk packaging helps reduce downtime by keeping plenty of discs on hand for continuous work. The 5-inch size fits many standard sanding tools.
These pack sizes make it easy to stock up and maintain workflow efficiency. Whether for woodworking, metalworking, or paint prep, having the right quantity ensures you’re always ready for the next job.
3M Microfinishing PSA Film Disc 366L, 30 Mic 3MIL, Type D, 5 in x NH, Die 500X, 50/Bag, Case of 500
3M
$438.02 Per Case
