NEODYMIUM RING MAGNETS
High Performance Ring Magnets
Neodymium ring magnets are permanent magnets with a center hole, a distinctive shape, and a uniform magnetic field distribution. Their architecture makes them especially useful in situations requiring accurate magnetic field concentration and efficient magnetic power transfer. Because of their ring form, these magnets may readily merge with other mechanical components and are frequently utilized in motors, speakers, sensors, and other applications.
Ring Magnets in Standard Sizes & Custom Options
The size of an NdFeB ring magnet has a direct impact on its performance in a particular application. A ring magnet that is too large might cause unstable connections or be challenging to integrate, while a ring magnet that is too tiny cannot offer enough magnetic field strength. Picking the appropriate size is vital to guaranteeing that the magnet fits precisely into the system.
- The diameter ranges typically from 6.00 mm to 60.00 mm (0.24 to 2.36″).
- The height ranges from 1.500 mm to 30.00 mm (0.06″ to 1.18″).
- The Inner diameter ranges from 2.00 mm to 23.00 mm (0.08″ to 0.91″).
- Adhesive force ranges from 0.4 KG to 120.00 KG.
*The unique ring magnet construction makes direct tightening not the best approach. Tremendous pressure might break the magnet as NdFeB is a somewhat brittle substance. We advise handling a safer and more convenient magnet with a countersunk hole.
During customization, we ensure that each magnet’s dimensions are exact and give rigorous tolerance limits. The specific tolerances are:
Diameter tolerances range from
- 1.50 mm to 25.00 mm (0.06″ to 1.00″), tolerance is ±0.10 mm (±0.004″).
- 25.00 mm to 50.00 mm (1.00″ to 2.00″), tolerance is ±0.20 mm (±0.008″)
- 50.00 mm to 60.00 mm (2.00″ to 2.36″), tolerance is ±0.30 mm (±0.012″)
- Thickness tolerance: ±0.10 mm applies to all sizes.
These tolerances and dimensions may be adjusted based on a specific application’s operating environment and design requirements.
Magnetization Pattern and Direction
The different ring designs of neodymium ring magnets provide different magnetization techniques.
The axial magnetization is the most often used technique, as the magnetic field is spread along the ring’s center axis to provide homogeneous magnetic strength. Motors and sensors both extensively utilize this technique.
Radial magnetization is another technique wherein the magnetic field is dispersed throughout the ring’s radius, thus fitting for uses requiring high peripheral magnetic fields, including magnetic motors and levitation systems. Commonly utilized in high-precision sensor systems.
Bipolar magnetization may also be done for particular applications using opposing magnetic poles on the two sides of the ring. Based on application needs, every magnetizing technique provides ideal magnetic field distribution, thereby entirely using the performance benefits of ring magnets.
Axially Magnetized
Diametrically Magnetized
Ring Magnet Features & Characteristics
- What is a ring magnet? A ring magnet is a permanent magnet with a central hole and a ring-shaped design.
- How are ring magnets magnetized? Ring magnets can be magnetized axially (along the center axis), radially (from the inner to outer diameter), or with bipolar magnetization (opposite poles on each face).
- What are ring magnets used for? They are used in electric motors, magnetic couplings, speakers, sensors, and magnetic levitation systems.
- Can I modify or cut a ring magnet? Modifying or cutting a ring magnet is not recommended, as it can cause it to break or lose its magnetic properties.
- What should I avoid when handling ring magnets? Avoid dropping, using excessive force, and exposing the magnets to high temperatures, as these can cause them to crack or lose strength.
- How do I choose the right size? Select the size based on the magnetic strength required and the available space for installation. Refer to TOPMAG specifications for guidance.
- Are ring magnets safe to use? But handle it carefully to avoid injury from the strong magnetic force. Keep them away from sensitive electronics.
- How do I maintain ring magnets? Clean with a soft cloth and avoid abrasive materials. If needed, use a mild soap solution and dry thoroughly before storage.
Ring Magnets in Other Designs
TOPMAG offers ring magnets made of materials other than Neodymium, such as ferrite, Alnico, and SmCo. Each substance has its benefits; thus, it is used in a particular sector.
Ferrite Ring Magnets are inexpensive and corrosion-resistant, making them excellent for low-power, low-cost applications. They are especially helpful in audio systems because they offer a constant magnetic field without dramatically raising expenses.
Alnico Ring Magnets: One significant advantage of alnico magnets is their ability to maintain strong magnetism even at very high temperatures. They operate well in heat-resistant applications, such as heat sensors and high-performance audio equipment.
SmCo Ring Magnets: Samarium-cobalt magnets have a high magnetic density and are resistant to high temperatures, making them ideal for applications requiring high performance and stability. They are widely used in aircraft, military equipment, and precise systems that need stable and intense magnetic fields.
