Neodymium Cylinder Magnet 20mm x 20mm N52H | High Temperature ≤120ºC
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Neodymium Cylinder Magnet – 20mm x 20mm | N52H | High Temperature
The Neodymium Cylinder Magnet – 20mm x 20mm | N52H | High Temperature is a premium rare earth permanent magnet engineered for demanding applications where maximum magnetic strength and high-temperature resistance are essential. Manufactured from N52H grade neodymium iron boron (NdFeB), this magnet combines one of the strongest commercially available neodymium grades with enhanced thermal stability, making it ideal for industrial machinery, automation systems, motors, and precision engineering.
Measuring 20mm in diameter and 20mm in length, this large cylinder magnet features a balanced profile that provides exceptional magnetic performance while remaining easy to integrate into custom housings, tooling, automation equipment, and OEM assemblies. Its combination of high magnetic energy and elevated operating temperature capability makes it suitable for applications where standard neodymium magnets may lose performance due to heat.
The magnet is axially magnetised through its 20mm length, positioning the north and south poles on the two circular end faces. This magnetisation direction creates a powerful and concentrated magnetic field, making it ideal for magnetic holding, positioning, magnetic couplings, sensors, actuators, electric motors, and industrial fixtures.
Finished with a durable nickel-copper-nickel (Ni-Cu-Ni) triple-layer coating, the magnet offers excellent resistance to corrosion and everyday wear while maintaining a bright polished silver finish for long service life.
Key Features
- Premium N52H grade neodymium rare earth magnet
- Designed for high-temperature operating environments
- Dimensions: 20mm diameter x 20mm length
- Exceptional magnetic strength
- Axially magnetised through the 20mm length
- North and south poles located on the circular end faces
- High magnetic energy density
- Durable nickel-copper-nickel (Ni-Cu-Ni) plated finish
- Precision manufactured for consistent performance
- Suitable for demanding industrial and engineering applications
Common Applications
- Industrial automation
- Electric motors and generators
- Robotics
- Heavy-duty magnetic fixtures
- Magnetic couplings
- Sensors and actuators
- Manufacturing equipment
- Scientific and laboratory instruments
- Automotive engineering
- Custom OEM assemblies
Ideal For
- Engineers
- OEM manufacturers
- Automation specialists
- Machine builders
- Motor manufacturers
- Robotics developers
- Product designers
- Research laboratories
- Maintenance engineers
- Precision fabrication workshops
Why Choose an N52H High Temperature Neodymium Cylinder Magnet?
The N52H grade combines the exceptional magnetic strength of N52 neodymium with enhanced thermal stability, making it ideal for applications exposed to elevated operating temperatures. It delivers superior holding force while maintaining reliable magnetic performance in environments where conventional neodymium magnets may begin to lose strength.
The 20mm x 20mm dimensions create a balanced cylindrical profile that provides excellent stability within precision-machined housings, magnetic assemblies, and automation equipment. Its generous diameter and length make it suitable for high-performance magnetic holding, positioning, and coupling applications requiring substantial magnetic force.
Because the magnet is axially magnetised through its length, the magnetic field is concentrated on the circular end faces, providing powerful end-to-end attraction and dependable performance in industrial machinery, automation systems, and precision engineering applications.
Technical Specifications
- Product Type: Neodymium Cylinder Magnet
- Material: Neodymium Iron Boron (NdFeB)
- Magnet Grade: N52H (High Temperature)
- Shape: Cylinder
- Diameter: 20mm
- Length: 20mm
- Magnetisation: Axially magnetised through the 20mm length
- Pole Orientation: North and south poles on the circular end faces
- Coating: Nickel-Copper-Nickel (Ni-Cu-Ni)
- Finish: Polished silver nickel finish
- Magnet Type: Permanent Rare Earth Magnet
- Application: Holding, positioning, automation, electric motors, sensing, manufacturing, and high-temperature engineering applications
Please Note
N52H magnets are specifically engineered for applications involving elevated temperatures and generally provide a higher maximum operating temperature than standard N52 neodymium magnets. Exceeding the recommended operating temperature may result in permanent loss of magnetic strength.
Due to its large size and extremely powerful magnetic field, this 20mm x 20mm N52H cylinder magnet should be handled with extreme care. Strong attraction forces can create pinch hazards and may cause the magnet to chip or crack if allowed to collide with other magnets or ferrous objects.
Actual holding force depends on the thickness, finish, and condition of the mating steel surface. Air gaps, paint, coatings, rust, uneven contact, elevated temperatures beyond the magnet's rating, and sideways or peeling forces can significantly reduce magnetic performance.
Neodymium magnets are hard but brittle. Do not drill, cut, machine, weld, or subject the magnet to heavy impacts, as this may damage both the magnet and its protective coating.
Keep away from children, pacemakers, medical implants, magnetic storage media, credit cards, and sensitive electronic equipment that may be affected by strong magnetic fields.
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.
