Neodymium Disc Magnet 7mm x 5mm N42
Same Day Dispatch
Order before 1pm to qualify for same day dispatch.
Neodymium Disc Magnet – 7mm x 5mm | N42
The Neodymium Disc Magnet 7mm x 5mm | N42 is a compact yet powerful rare earth permanent magnet designed for applications where high magnetic strength is required in a small, versatile package. Manufactured from premium N42-grade Neodymium Iron Boron (NdFeB), this precision disc magnet measures 7mm in diameter and 5mm thick, making it ideal for electronics, engineering, product manufacturing, magnetic closures, automation, and countless DIY and commercial projects.
Its balanced dimensions provide an excellent combination of magnetic holding force and compact size, making it suitable for installations where space is limited but reliable magnetic performance is essential. The magnet is axially magnetised, with the north and south poles located on the two flat circular faces, delivering maximum holding strength when placed against a ferrous steel surface or paired with another magnet.
Finished with a durable nickel-copper-nickel (Ni-Cu-Ni) coating, this magnet offers excellent resistance to corrosion, oxidation, and everyday wear while maintaining a smooth, polished appearance.
Whether you're designing electronic products, building custom magnetic assemblies, or developing industrial equipment, the 7mm x 5mm N42 Neodymium Disc Magnet provides dependable, long-lasting magnetic performance.
Key Features
- Premium N42-grade neodymium rare earth magnet
- Dimensions: 7mm diameter x 5mm thick
- Compact disc design with excellent magnetic strength
- Axially magnetised for maximum face-to-face magnetic performance
- Durable nickel-copper-nickel (Ni-Cu-Ni) protective coating
- Excellent resistance to corrosion and oxidation
- Precision manufactured for consistent magnetic performance
- High-strength permanent magnet
- Suitable for industrial, commercial, and DIY applications
Common Applications
- Magnetic catches and closures
- Electronics and sensor assemblies
- Product manufacturing
- Industrial automation equipment
- Robotics and control systems
- Scientific and laboratory equipment
- Magnetic fixtures and positioning devices
- Engineering prototypes
- Educational projects
- Hobby and maker applications
Ideal For
- Engineers
- Product designers
- OEM manufacturers
- Automation specialists
- Electronics technicians
- Cabinet makers
- Makers and hobbyists
- Research and development teams
Why Choose a 7mm x 5mm N42 Neodymium Disc Magnet?
The 7mm x 5mm N42 Neodymium Disc Magnet offers an excellent balance of size, strength, and versatility. Its compact dimensions make it easy to integrate into products and assemblies, while the premium N42-grade neodymium material provides significantly greater magnetic performance than ferrite or ceramic magnets of a similar size.
Its 5mm thickness creates a concentrated magnetic field, making it well suited to magnetic holding, positioning, sensing, and retention applications across industries including electronics, manufacturing, automation, cabinetry, and product development.
Technical Specifications
- Material: Neodymium Iron Boron (NdFeB)
- Magnet Grade: N42
- Shape: Disc
- Diameter: 7mm
- Thickness: 5mm
- Magnetisation: Axial (through the thickness)
- Coating: Nickel-Copper-Nickel (Ni-Cu-Ni)
- Magnet Type: Permanent Rare Earth Magnet
Please Note
This is a high-strength rare earth magnet and should be handled carefully. Despite its compact size, it produces a powerful magnetic field and can attract steel objects or other magnets unexpectedly, creating pinch hazards or causing the magnet to chip or fracture if allowed to collide.
Maximum holding force is measured under ideal conditions using a clean, flat, thick mild steel surface with full face-to-face contact. Actual magnetic performance will vary depending on the steel thickness, air gap, surface finish, mounting arrangement, and operating environment.
Keep away from children, as small magnets can present a serious swallowing hazard. Keep away from pacemakers, implanted medical devices, sensitive electronic equipment, and magnetic storage media. Do not drill, machine, or strike the magnet, as neodymium is hard but brittle and may crack or shatter under excessive impact or mechanical stress. For optimum performance and service life, avoid prolonged exposure to corrosive environments or temperatures exceeding the recommended operating range for standard N42 neodymium magnets.
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.
