3M Cloth Belt 340D, 3 in x 21 in P120 X-weight, (10/Carton) Case of 50

• Heavyweight cloth backing provides durability for high-production environments
• Open coat construction provides improved cut on all woods and helps prevent loading
• Premium aluminum oxide offers increased cut-rate and abrasive life
• Resin bond construction withstands high heat and pressure for longer service life
• Washable backing enables repeated use on high-loading substrates such as pine

3M Cloth Belt 340D is an open coat premium grade aluminum oxide cloth belt that provides durability for aggressive stock removal, resists loading, and is suitable for a variety of applications on wood and metal. This belt is recommended for wide belt sanding, edge sanding, or portable belt sanding.

Fast-cutting aluminum oxide abrasive grains are resin-bonded to a durable cotton cloth backing to provide continuous cut and long-life. Our open coat and load-resistant coating make this belt particularly favorable for sanding soft woods. Additionally, the washable backing is suitable for high production environments where the belt may need washing at intervals to remove soft wood resin or pitch buildup.

Aluminum oxide mineral is a popular choice among industrial professionals because of its cut-rate, durability, and long life. It can be used on a wide variety of materials in both woodworking and metalworking, including ferrous alloys, and is the most commonly used industrial abrasive. The abrasive particles are adhered to the cloth backing with resin, creating a strong bond that withstands high heat and pressure.

Abrasive belts come in many different widths and lengths and are used on a variety of different belt sanding tools for many different applications on both wood and metal. At 3M we offer a broad selection of belts to fit most any industrial belt sander. Wider belts are used with wide belt sanders to dimension or finish wood panels, smooth rough cut edges of metal sheets, or add a grain pattern to stainless steel sheets. Medium-width belts fit onto edge sanders for sanding flat, narrow surfaces such as panel edges; and narrow belts are used with portable belt sanders for sanding or blending wood pieces such as cabinet doors.

Belts come with various splices that join the belt ends. A film media splice achieves a secure bond with a joining film that minimizes chatter marks, ensures a smooth running belt, and produces consistent finishing results. A sine wave splice is constructed of interlocking fingers that enable the splice to travel smoothly over contact wheels, reduce hinging, and provide added strength to the joint area. Sine wave splices are typically used for coarser grades and wide belts as well as on belts that are going to be washed.

Trusted 3M Cloth Belt

The 3M Cloth Belt 340D is designed for durability and performance. This model features heavyweight cloth backing that stands up to high-production environments, ensuring long-lasting use.

Ideal for professionals, this belt is a premium choice for sanding tasks. The 3 in x 21 in size fits many belt sanders, making it versatile for various applications.

Premium Grade Aluminum Oxide

This belt uses P120 X-weight aluminum oxide abrasive grains, known for fast cutting and long life. The premium grade ensures efficient stock removal on wood and metal surfaces.

Aluminum oxide is a popular industrial abrasive mineral, providing consistent performance on ferrous alloys and soft woods alike, making this belt suitable for many materials.

Open Coat Construction Benefits

The open coat design helps prevent loading by allowing dust and debris to escape during sanding. This feature improves cutting efficiency, especially on soft woods like pine.

Because of this construction, the belt maintains its cutting ability longer and reduces clogging, which is essential for smooth, continuous sanding in demanding jobs.

Washable Backing Convenience

The washable backing on this 3M belt allows repeated use, even on high-loading substrates. This means you can clean the belt to remove resin or pitch buildup and extend its life.

This feature is particularly useful in high-production settings where belts often accumulate soft wood resin, ensuring consistent performance without frequent replacements.

Pack Size And Format

This product comes as a case of 50 belts, each measuring 3 in x 21 in. The quantity supports large projects or ongoing production needs without frequent reordering.

The belts are designed for use in wide belt sanding, edge sanding, or portable belt sanding tools, offering flexibility across different sanding applications and equipment.