Neodymium Ring Magnets
Neodymium ring magnets are one of the most widely used permanent magnet shapes because they combine strong magnetic force, center-hole design, and efficient rotational performance. Their circular structure makes them ideal for shafts, bearings, motor rotors, and precision assemblies. We manufacture and supply custom neodymium ring magnets in a wide range of sizes, grades, coatings, and magnetization options for global B2B customers.
Neodymium Ring Magnets Manufacturer
- Specifications to offer:
- Minimum order quantity: 1 piece
- Lead time:
- The fastest = 7 days for regular shapes the fastest shipping
- Standard = 20 days for custom designs
Ring Magnets Definition
A neodymium ring magnet is a circular magnet with a center hole, made from NdFeB (Neodymium Iron Boron), one of the strongest permanent magnetic materials available.
Ring magnets are typically defined by:
- Outer diameter (OD)
- Inner diameter (ID)
- Thickness
- Magnet grade
- Coating type
- Magnetization direction
They are widely used in rotating systems and compact mechanical designs.
Why Choose Ring Magnets?
The ring shape provides several advantages:
- Strong magnetic force in compact size
- Easy mounting on shafts or rods
- Ideal for rotational applications
- Balanced circular magnetic field
- Space-saving center-hole design
- Efficient for motors and sensors
Common Sizes Available
We supply standard and custom sizes such as:
- 10 mm OD x 5 mm ID x 3 mm
- 15 mm OD x 8 mm ID x 5 mm
- 20 mm OD x 10 mm ID x 5 mm
- 25 mm OD x 12 mm ID x 6 mm
- 30 mm OD x 15 mm ID x 10 mm
Custom dimensions are available according to your drawing.
Ring Magnet Grades Available
| Grade | Strength Level | Typical Use |
|---|---|---|
| N35 | Standard | General products |
| N42 | Medium-high | Eletrónica |
| N48 | High | Compact motors |
| N52-N55 | Very high | Maximum power density |
| H / SH | High temp | Automotive / motors |
We can recommend the best grade for your application.
Surface Coating Options
For corrosion resistance and durability:
- Níquel (Ni-Cu-Ni)
- Zinco
- Epoxi
- Epóxi preto
- Ouro
- PTFE (special request)
Ring Magnet Magnetization Options
Ring magnets can be magnetized in multiple ways:
Magnetização axial
Top face = one pole, bottom face = opposite pole.
Common for holding force and simple assemblies.
Magnetização diametral
One side = North, opposite side = South.
Used in sensors and rotating devices.
Magnetização multipolar
Multiple alternating poles around the ring.
Ideal for motors, encoders, and advanced systems.
Magnetização radial
Magnetic poles arranged from inner to outer diameter (selected designs).
Used in high-performance motor systems.
Ring Magnet Customization Options
We support OEM customization for:
- Outer diameter
- Inner diameter
- Thickness
- Grade
- Revestimento
- Pole count
- Magnetization direction
- Embalagem
- Assembly integration
How to Choose the Right Ring Magnets
| Necessidade | Recommended Option |
|---|---|
| General holding use | Axial magnetized ring |
| Shaft mounting | Standard ring magnet |
| Sensor rotation use | Diametrical ring |
| Utilização do rotor do motor | Multi-pole ring |
| Heat resistance | H / SH grade |
| Maximum force | N52 ring magnet |
Ring Magnet Applications
Neodymium ring magnets are essential components in numerous industries due to their high performance and reliability. Some key applications include:
Automotive
Critical for electric motors in hybrid and electric vehicles, as well as in sensors, actuators, and other components in luxury cars.
Eletrónica
Integral to hard disk drives, high-end loudspeakers, and other consumer electronics requiring strong and compact magnetic fields.
Dispositivos médicos
Used in MRI machines, dental equipment, and other medical tools where precise and powerful magnetic fields are essential.
Energias renováveis
Vital for wind turbine generators and other sustainable energy technologies, contributing to efficient energy production.
Aerospace
Integrated into sensors, actuators, and high-reliability systems where performance and durability are critical.
Magnetization Technology
Used in magnetizing fixtures to imbue other materials with magnetism, supporting manufacturing processes.
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