how do magnetic drum pulleys work

Magnetic drum pulleys are mounted at the head of the conveyor belt where the discharge takes place and removes metal contaminants from the product on the conveyor belt. It is integrated into the system for automatic continuous separation and attracts the metal parts during the roller rotation while the cleaned product emerges.

As soon as the conveyor belt leaves the roller, the effect of the magnet wears off and the undesired impurities fall from the underside of the belt into a separate collecting container. This type of magnet serves as additional protection against metal parts that have penetrated deep into the product and were not extracted during the first separation by a hanging magnet. This greatly improves the quality and purity of the processed materials.

Industrial applications include processes with dry materials such as plastics, powders, grains, wood waste, rubber, and so on.

Magnetic Drum Pulleys

Magnetic drum pulleys are available with the required connecting shafts according to customer specifications. If the customer asks for, the roller offers special features such as spherical surfaces that can be integrated into the design. The production of the roller in the form of a barrel has the additional advantage that the conveyor belt keeps the direction on the roller more precisely.

Particularly, this is very important if there is no tensioning system in the conveyor that controls the sideways movement of the belt. The roller can also be supplied with a rubber coating that is glued to the surface, which prevents the rubber conveyor belt from sliding over the roller.

Magnetic drum pulleys can be integrated as part of a completely new system or as a custom-made product into existing conveyor systems. In both cases, assembly is very easy. A lot of rollers are made of 304 SS stainless steel with strong corrosion resistance. The ferrite roller usually has a thickness of 1,500 – 2,000 Gauss. The strongest rare earth magnet for this application with high energy density has a strength of 3,500 Gauss and can remove the smallest particles from the material.

Magnetic drum pulleys at the material outlet of the conveyor belt has another great advantage:

  • Thanks to its self-cleaning system, no or only minimal maintenance is required.

The cleaned material falls directly from the magnetic drum pulleys while the metal is still held on the belt. The belt moves away from the magnetic drum pulleys as soon as possible, the metal parts are released, into a waste chute. That makes the conveyor belt a self-cleaning magnet.

The stable and permanent properties of the magnetic drum pulleys mean that no external energy source is required for operation and the average loss of magnetic field strength of less than 5% over the course of a year is negligible (unless the roller is exposed to heat, shock or vibration) . In order to ensure a better end product, the roller will be a cost-effective solution

Ben

I’m Ben, with over 10 years in the permanent magnet industry. Since 2019, I’ve been with Osenc, specializing in custom NdFeB magnet shapes, magnetic accessories, and assemblies. Leveraging deep magnetic expertise and trusted factory resources, we offer one-stop solutions—from material selection and design to testing and production—streamlining communication, accelerating development, and ensuring quality while reducing costs through flexible resource integration.

Table of Contents

On Key

Related Posts

Strength of N45 vs N42 vs N52

N42 Vs N45 Vs N52 Magnet

Have you ever picked up a magnet and wondered which one is the strongest? N52 is the strongest magnet grade among the three. When I look at the N42 vs the N52 magnet, I see that the N52 pulls much harder than the N42 or the N45. I always check n42 vs n52 magnet before I buy

magnetic drum

What is a Magnetic Drum and How Does It Work

In factories, a magnetic drum is a machine used to separate magnetic metals like iron from other materials. As the drum spins, it pulls out metal pieces using a strong magnet. This helps protect other machines and makes the final product cleaner and safer. Magnetic drums are commonly used in recycling, mining, food processing, and

neodymium disc magnet

What Is a disc magnet and disc magnet field

Many people ask me, what is a disc magnet? A disc magnet is a round, flat magnet with strong magnetic fields focused on its flat surfaces. These magnets look simple, but their shape makes them stand out. Understanding magnetic field basics helps you see why disc magnets work so well in daily life. I see disc magnets

Scroll to Top

Get An Instant Quotation Now