Neodymium Cylinder Magnet 10mm x 20mm N42
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Neodymium Cylinder Magnet – 10mm x 20mm | N42
The Neodymium Cylinder Magnet – 10mm x 20mm | N42 is a premium rare earth permanent magnet designed to deliver powerful magnetic performance in a compact cylindrical form. Manufactured from high-quality N42 grade neodymium iron boron (NdFeB), this magnet provides an excellent balance of strength, reliability, and value for industrial, commercial, engineering, and DIY applications.
Measuring 10mm in diameter and 20mm in length, this cylinder magnet features a slim, elongated profile that is ideal for applications requiring a strong magnetic field in confined spaces. It is commonly used in automation equipment, magnetic fixtures, robotics, sensors, product manufacturing, scientific instruments, and custom engineering assemblies where dependable magnetic performance is essential.
The magnet is axially magnetised through its 20mm length, meaning the north and south poles are located on the two circular end faces. This magnetisation direction creates a concentrated magnetic field at each end of the cylinder, making it particularly effective for magnetic holding, positioning, reed switch activation, magnetic couplings, and precision alignment applications.
Protected by a durable nickel-copper-nickel (Ni-Cu-Ni) triple-layer coating, the magnet offers excellent resistance to corrosion and everyday wear while maintaining a polished silver finish. Whether you're manufacturing products, developing prototypes, or building industrial equipment, the 10mm x 20mm N42 Neodymium Cylinder Magnet provides long-lasting and consistent magnetic performance.
Key Features
- Premium N42 grade neodymium rare earth magnet
- Dimensions: 10mm diameter x 20mm length
- Strong permanent magnetic performance
- Slim cylindrical profile
- Axially magnetised through the 20mm length
- North and south poles located on the circular end faces
- Excellent strength-to-size ratio
- Durable nickel-copper-nickel (Ni-Cu-Ni) plated finish
- Precision manufactured for dimensional accuracy
- Suitable for industrial, commercial, and engineering applications
Common Applications
- Industrial automation
- Magnetic holding systems
- Robotics
- Reed switch activation
- Precision positioning
- Electric motors
- Magnetic couplings
- Electronic devices
- Scientific equipment
- Product prototypes
Ideal For
- Engineers
- OEM manufacturers
- Automation specialists
- Product designers
- Electronics technicians
- Robotics developers
- Research laboratories
- Maintenance engineers
- Fabricators
- DIY engineering projects
Why Choose an N42 Neodymium Cylinder Magnet?
The N42 grade offers an excellent combination of magnetic strength, durability, and cost-effectiveness, making it one of the most widely used neodymium grades across industrial and commercial applications.
The 10mm x 20mm dimensions provide a practical 2:1 length-to-diameter ratio, creating a strong and focused magnetic field while allowing easy installation into drilled holes, cylindrical housings, tooling, and precision components. This makes the magnet particularly suitable for locating systems, automation equipment, actuators, magnetic sensors, and custom assemblies.
Because the magnet is magnetised through its length, the magnetic field is concentrated on the circular end faces, providing reliable end-to-end attraction and consistent performance in holding, coupling, switching, and positioning applications.
Technical Specifications
- Product Type: Neodymium Cylinder Magnet
- Material: Neodymium Iron Boron (NdFeB)
- Magnet Grade: N42
- Shape: Cylinder
- Diameter: 10mm
- 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, sensing, automation, electronics, manufacturing, and precision engineering
Please Note
Neodymium magnets are extremely powerful for their size and should be handled carefully. This 10mm x 20mm N42 cylinder magnet can attract steel objects or other magnets suddenly, creating pinch hazards and potentially causing the magnet to chip or crack if allowed to collide.
Actual holding force depends on the thickness, finish, and condition of the mating steel surface. Air gaps, paint, coatings, rust, uneven contact, elevated temperatures, 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 impact, as this may damage the magnet or its protective coating.
Keep away from children, pacemakers, medical implants, magnetic storage media, 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.
