Neodymium Disc Magnet 20mm x 3mm N42
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Neodymium Disc Magnet 20mm x 3mm N42
Strong, slim, and highly versatile, this Neodymium Disc Magnet measures 20mm in diameter x 3mm in thickness and is manufactured from premium N42-grade rare earth neodymium for reliable magnetic performance across a wide range of industrial, commercial, workshop, and DIY applications. Its low-profile disc design provides excellent holding power while remaining compact and easy to integrate into custom projects and assemblies.
Finished with a durable NiCuNi nickel coating, this magnet features a smooth polished silver appearance while helping protect against corrosion and wear. Magnetised through the 3mm thickness (axially magnetised), it delivers concentrated magnetic force across the flat circular face for dependable holding and mounting performance.
Its larger diameter combined with a slim profile makes this neodymium disc magnet ideal for magnetic mounting systems, signage, retail displays, cabinetry, packaging, electronics, magnetic closures, and fabrication projects. Whether you're prototyping products, organising workspaces, or creating custom magnetic solutions, this N42 disc magnet offers professional-grade quality and versatility.
Features & Benefits
- Premium N42-grade neodymium rare earth magnet
- Dimensions: 20mm diameter x 3mm thickness
- Slim low-profile disc design
- Strong magnetic holding performance
- Durable NiCuNi nickel plated coating
- Magnetised through the thickness (axial magnetisation)
- Smooth polished metallic finish
- Suitable for industrial, commercial, hobby, and DIY applications
Common Applications
- Magnetic mounting and holding systems
- Retail displays and signage
- Magnetic closures and fasteners
- Electronics and sensor systems
- Cabinetry and furniture applications
- Product design and prototyping
- Arts, crafts, and DIY projects
- Lightweight positioning and mounting systems
Please Note
Neodymium magnets are extremely strong for their size and should be handled carefully. Magnets may snap together unexpectedly and can chip or crack upon impact. Keep away from children, pacemakers, electronic devices, and magnetic storage media.
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.
