NdFeB magnets are known for their durability, especially when coated with protective materials like nickel or epoxy. These coatings help protect the magnet from corrosion, oxidation, and physical damage, ensuring the longevity and reliability of the magnet in various environments.

NdFeB ring magnets with holes are no exception to this. The robust nature of the material ensures that these magnets can withstand high temperatures, moisture, and other environmental factors. The coating not only enhances their resistance to corrosion but also improves their overall strength, ensuring they retain their magnetic properties for a long period.

In addition, these magnets are highly resistant to demagnetization. Their strong coercivity (the ability to resist becoming demagnetized) ensures that they maintain their magnetic strength over time, even under varying environmental conditions. This durability makes them ideal for use in industrial settings, where magnets are subjected to continuous use and potential wear and tear.

While NdFeB magnets are often more expensive than other types of magnets, their superior magnetic properties and durability make them a cost-effective choice in the long run. Due to their strength, fewer NdFeB ring magnets are typically needed to achieve the same magnetic effect as weaker magnets, which can reduce the overall cost of materials for an application. Additionally, the longevity and reliability of NdFeB magnets reduce the need for frequent replacements, leading to cost savings over time.

Due to their unique characteristics, NdFeB ring magnets with holes are used in a variety of applications. Some of the most common include:

Electric motors and generators: The hole allows the magnet to be mounted on a rotating shaft, essential for motor and generator applications.

Magnetic bearings: The magnet's strength and the ability to accommodate central components make it useful in levitation systems and bearings.

Magnetic sensors and actuators: The strong magnetic field generated by these magnets is used in sensors for industrial equipment or consumer devices.

Magnetic couplings: In industrial settings, NdFeB ring magnets with holes can be used in couplings to transmit torque without physical contact.

https://www.mlmagnet.com/product/ndfeb-ring-shape-magnet/ring-neodymium-magnets-with-hole.html
These are ring neodymium magnets with holes used in various applications where they can be stuck and repositioned with ease during use. Neodymium ring magnets are one of the strongest permanent magnetic materials available and have high resistance to demagnetization.