Arc Magnet

Your Professional Arc Magnet Supplier！

Established in 2003, Hesheng Magnetics is one of the earliest enterprises engaged in the production of neodymium rare earth permanent magnets in China. We have a complete industrial chain from raw materials to finished products.we have become the leader in the application and intelligent manufacturing of neodymium permanent magnets field ,after 20 years development,and we have formed our unique and advantageous products in terms of super sizes, magnetic Assemblies,special shapes, and magnetic tools.

Why Choose Us

Customization Capabilities

With over 20 years of experience and continuous investment in technology, we support custom solutions including large-size magnets, complex shapes, and magnetic assemblies to meet specific application needs.

One-stop Solution

From raw materials to finished products, our complete in-house production chain ensures consistent quality, reliable lead times, and better cost control for long-term supply partnerships.

Our Certifications

Certified under ISO9001, ISO14001, ISO45001, and IATF16949, our production follows strict quality control systems.

Overview of Arc Magnet

Arc magnets (also known as tile or segment magnets) are curved permanent magnets designed to fit around circular components, primarily used in electric motors, generators, and rotors. They feature a segment-shaped arc that enables a precise, consistent magnetic field with a smaller air gap, optimizing efficiency, reducing energy loss, and increasing torque in rotating machinery.

Specifications and Materials

Materials:

Most arc magnets are composed of NdFeB for high magnetic strength or SmCo for high temperature tolerance.

Grades:

Vary from N35 to N55 for NdFeB, depending on strength needs.

Sizes:

Customizable to fit different rotor diameters and segment angles.

Magnetization:

Radial magnetization is common for efficient motor performance.

Product advantages

Strong Magnetic Field:

Neodymium arc magnets have one of the strongest magnetic fields among permanent magnets, making them highly efficient in applications requiring a compact and powerful magnet.

Custom Shapes:

The arc shape is tailored to fit into motors or generators, allowing for a more efficient magnetic field distribution around the rotation axis.

High Coercivity:

They have a high resistance to demagnetization, maintaining their magnetic properties under various conditions.

Temperature Sensitivity:

While neodymium magnets are known for their strength, their magnetic properties can decrease at high temperatures. Various grades are available to withstand different temperature ranges.

Corrosion Resistance:

Arc magnets are often coated to prevent corrosion. Common coatings include nickel, zinc, and epoxy.

Application

Motorsports and Vehicle Propulsion
You can find powerful and compact arc magnets within electric motors. These magnets help the electric motors to power up high end electric sports cars. In fact, they play a major role behind the acceleration of these cars. Its not just the cars, but you can find such motors in motorcycles as well.

Generators for Alternative Energy
The curved multi-segment arc magnet assemblies boost power density in wind turbines. You can also find them in tidal electricity generators. Arc magnets are responsible for enhancing the overall performance of these generators.

Medical Applications
When exploring the applications of arc magnets, you can't simply ignore the medical applications. Strong neodymium arc magnets are one of the most prominent components that you can find in MRI machines. These machines are available in almost all hospitals to scan patient anatomy. The arc magnets offer highly accurate results with magnetic resonance imaging. Some other medical applications where you find arc magnets include magnetic bracelets and magnetic necklaces.

Magnetic Separation
Industrial magnetic separators use permanent arc magnets. You can often find these in recycling facilities. These magnets are capable of extracting ferrous metals from waste streams.

Sound Systems
One of the most impressive properties of arc magnets is the ability to create an acoustic field. As a result, you can find them in multiple sound generation applications. For example, you can find arc magnets in speakers, microphones, and alarms. Even the audio system that you have in your car would have an arc magnet.

Household Appliances
You can also find arc magnets in numerous appliances that you have at your home. For example, you can find them on your mobile phone and computer. To be more specific, arc magnets play a major role in the functionality of a DVD ROM. The external speakers of your computer would have these magnets as well.

Coating / Plating

Composition & Vulnerability

Neodymium magnets consist of neodymium, iron, and boron. The iron content makes them prone to oxidation when exposed to air.

Protective Coating Solution

All our neodymium magnets feature micron-thin protective coatings that prevent corrosion without compromising magnetic performance or adhesion strength.

Coating Varieties

Multiple coating options are available, with triple-layer nickel plating (Ni-Cu-Ni) being the most common. This provides superior corrosion resistance through its composite structure.

Available Options

We offer various coatings including nickel, zinc, copper, epoxy, gold, silver, passivation, and PVC to meet different environmental requirements.

Custom

Sizes & Shapes

We offer neodymium magnets in sizes from 0.010" to large assemblies, with standard shapes like discs, blocks, rings, and arc segments. Custom shapes can be made to your specs.

Grades & Coatings

Available in grades N35 to N52. To prevent corrosion, magnets are coated with options like Nickel (Ni-Cu-Ni), Gold, Chrome, Copper, Epoxy, Teflon, and Rubber/Plastic.

Certifications

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Package & Delivery

Packing Details: Professional packages with white box, carton with foam and iron sheet to sheilding the magnetism during the transportation, which could be shipped by air and sea.

Delivery Details: 7-30 days after order confirmation.

We have special and contract price with DHL,FedEx,UPS and TNT.We have our own sea and air forwarder with rich experience for magnets deliver.Competitive price for freight cost to support.

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FAQ

Q: What are neodymium arc magnets?

A: Neodymium arc magnets are a type of rare-earth magnet made from an alloy of neodymium, iron, and boron, shaped in the form of an arc or segment. These magnets are designed to fit the round shape of motors and generators, providing a powerful magnetic field in a specific direction.

Q: How do neodymium arc magnets differ from other neodymium magnets?

A: The main difference lies in their shape. While neodymium magnets can come in various forms, such as discs, blocks, or cubes, arc magnets are specifically cut into arc shapes to fit circular assemblies. This shape allows them to generate a directional magnetic field around the circumference of a circle, making them ideal for rotational applications.

Q: What are the common uses for neodymium arc magnets?

A: Neodymium arc magnets are commonly used in high-performance motors, generators, and turbines. They are also found in electric vehicles, wind turbines, hard disk drives, and in various types of loudspeakers and dynamic microphones due to their ability to produce a strong magnetic field in a specific direction.

Q: Can neodymium arc magnets be customized?

A: Yes, neodymium arc magnets can be customized in terms of size, angle, grade, and magnetic orientation to meet specific requirements. Customization is essential for them to fit precisely in the devices they are designed for, such as specific motor or generator models.

Q: How strong are neodymium arc magnets?

A: Neodymium arc magnets are among the strongest types of magnets available, capable of generating significant magnetic force. The strength of an arc magnet depends on its grade, size, and the design of the magnetic circuit in which it is used.

Q: Are neodymium arc magnets coated?

A: Like other neodymium magnets, arc magnets are typically coated to prevent corrosion. The coatings can include nickel, copper, zinc, or epoxy, which protect the magnet from moisture and chemical exposure.

Q: Do neodymium arc magnets have a specific magnetic orientation?

A: Yes, neodymium arc magnets are manufactured with a specific magnetic orientation that is aligned with the arc's geometry. This orientation is crucial for their use in motors and generators, where the magnetic field needs to interact precisely with the device's other components.

Q: How should neodymium arc magnets be handled?

A: Handling neodymium arc magnets requires caution due to their strong magnetic force. Protective gloves should be worn to prevent injuries, and the magnets should be kept at a safe distance from electronic devices and magnetic storage media to avoid damage.

Q: Can neodymium arc magnets lose their magnetism?

A: Neodymium arc magnets can lose their magnetism if exposed to high temperatures, strong demagnetizing magnetic fields, or if they are physically damaged. However, under normal operating conditions, they can maintain their magnetism for decades.

Q: How are neodymium arc magnets manufactured?

A: The manufacturing process for neodymium arc magnets involves melting the raw materials (neodymium, iron, and boron), casting the alloy into ingots, pulverizing the ingots into a fine powder, pressing the powder in a magnetic field to align the particles, sintering to fuse the particles, and then cutting the magnets into the desired arc shape before coating them for protection.

Q: Are samples available?

A: Complimentary samples are available from inventory; customers only pay shipping costs.

Q: How are these magnets shipped safely?

A: Each magnet is individually boxed and packed with foam inserts and magnetic shielding in reinforced cartons for air, sea, or rail freight.

As one of the most experienced arc magnet manufacturers and suppliers in China, we offer a wide range of products with superior quality. Please rest assured to wholesale cheap arc magnet for sale here from our factory. Customized orders are welcome.

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