3M Cloth Belt 340D, 50 X-weight, 37 in x 75 in, Film-lok, Single-flex, Case of 3

• 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 a heavyweight cloth backing that stands up well in high-production environments, ensuring long-lasting use.

Its premium aluminum oxide abrasive grains provide a fast cut rate, making it ideal for aggressive stock removal. The belt’s resin bond construction also helps it resist heat and pressure during use.

Precise Size And Format

This belt measures 37 inches by 75 inches, offering a large sanding surface for efficient work. The 50 X-weight backing adds strength and stability, suitable for demanding sanding tasks.

It comes in a case of 3, providing multiple belts for extended projects or replacement. The single-flex design allows for smooth operation on various sanding tools.

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 all types of wood.

Because of this, the belt maintains its cutting ability longer and reduces downtime for cleaning. It’s especially useful when working with soft woods prone to clogging abrasives.

Washable Backing Advantage

The washable backing lets you clean the belt to remove resin or pitch buildup, extending its life. This is particularly helpful when sanding high-loading substrates like pine.

Repeated washing keeps the belt performing well in tough conditions, making it a cost-effective choice for continuous use in woodworking or metalworking.

Film-lok Splice Technology

The Film-lok splice ensures a secure bond at the belt joint, minimizing chatter marks during sanding. This results in a smoother running belt and consistent finishing results.

This splice type is ideal for wide belts like this one, helping maintain belt integrity and performance over time. It supports the belt’s use in wide belt sanding and edge sanding applications.