Neodymium Ring Magnets
Adams Magnetic Products offers high-performance Neo ring magnets, designed for use in modern motors, generators, hydraulic cylinders, pumps, sensors, high-end loudspeakers, and high-intensity separators.
What Are Neodymium Ring Magnets?
Neodymium ring magnets are rare earth magnets made from neodymium-iron-boron (NdFeB) with a central hole. This shape allows them to be mounted on shafts, rods, or fasteners while delivering very high magnetic strength in a compact form.
Advantages
- Exceptional Strength: Neodymium magnets are the strongest commercially available magnets.
- Versatility: Suitable for a wide range of advanced applications.
- Affordability: Cost-effective due to advancements in manufacturing processes.
Features
- High Magnetic Properties: Strong holding and magnetic force due to their high remanence and energy product.
- Hard and Brittle: Prone to chipping and breaking if not handled carefully.
- Magnetization: Typically (with some exceptions), ring magnets are magnetized through the thickness.
- Corrosion Resistance: Uncoated magnets may corrode in humid conditions.
- Temperature Tolerance: Operating temperatures vary by material grade.
Specifications
Standard Neo Rings
Countersunk Neodymium Ring Magnets
Interested in Learning More?
Adams is ready to provide high-quality neodymium ring magnets for your products. We offer stock and custom options. Contact us to get a quote with the cost and delivery date.
Frequently Asked Questions
Can neodymium ring magnets be customized?
Yes. Adams Magnetic Products can supply these ring magnets in custom:
- Outer and inner diameters
- Thicknesses
- Magnet grades
- Coatings and platings
- Magnetization directions
Custom tolerances and secondary operations can also be supported depending on application requirements.
What magnet grades are available?
Neodymium ring magnets are available in a wide range of grades, typically from N35 up to N56, as well as high-temperature grades. Higher grades offer increased magnetic strength, while specialized grades provide better performance at elevated temperatures.
What temperature limits should I consider?
Standard neodymium magnets typically operate up to 80°C (176°F). High-temperature grades can withstand temperatures up to 150°C (300°F), depending on the material and design. Selecting the correct grade is critical for long-term performance.
What coatings are available for neodymium ring magnets?
Common coatings include:
- Nickel (NiCuNi)
- Epoxy
- Zinc
Coatings help protect against corrosion and wear. Adams can help recommend the best option based on your environment and application.
Are these ring magnets brittle?
Yes. Neodymium magnets are hard but brittle and can chip or crack if mishandled or allowed to snap together. Proper handling, spacing, and packaging are important during assembly and use.
Can neodymium ring magnets be magnetized in different directions?
Absolutely. Ring magnets can be magnetized axially, diametrically, or with custom magnetization patterns depending on the application. Adams works closely with engineers to ensure proper magnetization for optimal performance.
Do you offer value-added services or assemblies?
Yes. Adams Magnetic Products offers value-added services including magnet assemblies, bonding, coating selection, testing, and application support to help reduce total system cost and simplify your supply chain.