Neodymium Ring Magnet OD24mm x H12mm | Hole 5mm N45
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Neodymium Ring Magnet – OD24mm x H12mm | ID5mm | N45
The Neodymium Ring Magnet – OD24mm x 12mm | ID5mm | N45 is a premium rare earth ring magnet engineered to deliver exceptional magnetic strength in a compact and versatile design. Manufactured from high-performance N45 grade neodymium (NdFeB), this permanent magnet features a 24mm outer diameter, 5mm centre hole, and 12mm thickness, making it ideal for applications requiring powerful magnetic holding force together with the ability to mount the magnet over shafts, bolts, rods, or locating pins.
Its thick profile and high-grade neodymium construction provide significantly greater magnetic performance than ferrite magnets of similar size. The 5mm centre bore enables secure mechanical installation while allowing the magnet to be integrated into machinery, magnetic couplings, positioning systems, jigs, fixtures, sensors, and custom engineering projects.
The magnet is axially magnetised through its 12mm thickness, with the north and south poles located on the two large flat circular faces. This provides a concentrated magnetic field for maximum contact with ferrous materials and reliable holding performance across a wide range of industrial, commercial, and DIY applications.
Protected by a durable nickel (Ni-Cu-Ni) triple-layer coating, this magnet offers excellent resistance to corrosion and everyday wear while maintaining a bright metallic finish suitable for demanding environments.
Whether you're designing automation equipment, manufacturing custom products, building magnetic assemblies, or developing prototypes, the OD24mm x ID5mm x 12mm N45 Neodymium Ring Magnet delivers outstanding strength, precision, and long-lasting reliability.
Key Features
- Premium N45 grade neodymium rare earth magnet
- 24mm outer diameter
- 5mm centre hole
- 12mm thickness
- High-strength permanent magnet
- Axially magnetised through the thickness
- Precision-machined ring design
- Durable nickel (Ni-Cu-Ni) plated finish
- Excellent resistance to corrosion in indoor environments
- Suitable for industrial, commercial, and engineering applications
Common Applications
- Magnetic couplings
- Industrial machinery
- Automation systems
- Robotics
- Precision positioning
- Magnetic fixtures and jigs
- Sensor assemblies
- Product development
- Scientific equipment
- DIY engineering projects
Ideal For
- Engineers
- OEM manufacturers
- Automation specialists
- Robotics developers
- Machinery manufacturers
- Research laboratories
- Product designers
- Maintenance technicians
- Educational institutions
- DIY makers
Why Choose an N45 Neodymium Ring Magnet?
The N45 grade provides stronger magnetic performance than lower neodymium grades, making it an excellent choice where maximum holding power is required within a compact footprint. Its combination of a 24mm outer diameter, 12mm thickness, and 5mm centre hole makes it particularly suitable for applications where the magnet needs to be mounted over a shaft, bolt, or locating pin without sacrificing magnetic strength.
The thick ring profile creates a powerful magnetic field across the two flat faces, making this magnet ideal for clamping, locating, holding, and positioning applications. Its compact dimensions also allow it to be incorporated into precision assemblies where space is limited but reliable magnetic performance is essential.
Manufactured to high tolerances and finished with a durable nickel coating, this magnet delivers dependable long-term performance for OEM manufacturing, industrial automation, scientific research, and custom engineering projects.
Technical Specifications
- Product Type: Neodymium Ring Magnet
- Material: Neodymium (NdFeB)
- Magnet Grade: N45
- Shape: Ring
- Outer Diameter (OD): 24mm
- Inner Diameter (ID): 5mm
- Thickness (Height): 12mm
- Magnetisation: Axially Magnetised (through the 12mm thickness)
- Coating: Nickel (Ni-Cu-Ni)
- Reusable: Yes
- Application: Holding, positioning, mounting, magnetic couplings, automation, and engineering assemblies
Please Note
Neodymium magnets are extremely powerful for their size and should be handled with care. They can attract steel objects and other magnets suddenly, creating pinch hazards or causing the magnet to chip if allowed to collide.
The 5mm centre hole is designed for mounting and positioning purposes. Avoid overtightening fasteners or applying excessive mechanical force, as neodymium magnets are hard but brittle and may crack under stress.
Actual magnetic performance will vary depending on the thickness and condition of the mating steel surface, air gap, alignment, operating temperature, and application design.
Keep this magnet away from pacemakers, medical implants, magnetic storage media, and sensitive electronic devices. Do not drill, cut, or machine the magnet after manufacture, as this may damage the protective coating and permanently weaken or fracture the magnet.
Typical Physical Properties
NB: Ranges are indicative for product category, please check individual products for specic values within that range.
Production Flow Diagram
Demagnetization Curves
Surface Treatment
The most common coating for Neodymium magnets is Nickel + Copper + Nickel (Ni + Cu + Ni). This coating offers the magnet relatively good protection from corrosion and passive applications. If the magnet will be exposed to moisture or liquid then consider the use of an organic coating such as Epoxy. A hard wearing coating, Epoxy is suited to applications where the magnet will come under some friction or knocking.
Range and Tolerance
Magnets are readily available in Blocks, Discs, Cylinders & Rings. We specializes in the supply of short-run prototype magnets including Arc Segments, various magnetic orientations etc. If you need a magnet size that we don't carry in stock, submit a Design-a-Magnet enquiry for a quote on your custom magnet design.
Magnetic Properties
Neodymium magnets are offered in several different grades. The first section N30-54 has an operating temperature of up to 80 degrees. Most of our stock only goes up to N38. The second section, denoted with the "M" prefix after the grade has an operating temperature 100 degrees. After this the grades are "H", "SH", "UH" & "EH". In order for the magnet to withstand a higher operating temperature, during production more of the raw material PrNd is incorporated as these elements have a naturally occurring resistance to high temperatures.
Returns Policy
If you are not entirely satisfied with your purchase, we're here to help.
We have a 30 Day Returns policy at Frenergy Magnets. You may return your item within 30 days of receiving it to receive a refund.
The product/s must be unused and in the same condition you received them in. Please contact us at info@frenergy.com.au to initiate the returns process.
The buyer is responsible for the cost of returning the order.
