Neodymium Cylinder Magnet 4mm x 10mm N38 | Copper Coated
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Neodymium Cylinder Magnet – 4mm x 10mm | N38 | Copper Coated
The Neodymium Cylinder Magnet 4mm x 10mm | N38 | Copper Coated is a powerful rare earth permanent magnet designed for applications requiring excellent magnetic performance in a slim cylindrical profile. Manufactured from premium N38-grade Neodymium Iron Boron (NdFeB), this magnet measures 4mm in diameter and 10mm in length, making it ideal for precision engineering, electronics, manufacturing, magnetic assemblies, and creative projects where a compact yet strong magnet is required.
Its extended 10mm length provides greater magnetic field depth than shorter cylinder magnets, making it well suited for press-fit installations, magnetic locating systems, sensors, product assemblies, and applications where deeper magnetic engagement is beneficial.
Finished with an attractive copper coating, this magnet offers a distinctive warm metallic appearance while providing excellent resistance to corrosion and oxidation. The copper finish makes it particularly suitable for visible installations, premium products, luxury packaging, decorative displays, and bespoke manufacturing where appearance is just as important as performance.
This magnet is axially magnetised, meaning the north and south poles are located on the two flat circular ends of the cylinder, delivering maximum holding force when used end-to-end or against a ferrous steel surface.
Key Features
- Premium N38-grade neodymium rare earth magnet
- Dimensions: 4mm diameter x 10mm length
- Attractive copper-coated finish
- Slim cylindrical profile with excellent magnetic field depth
- Axially magnetised for maximum end-face holding force
- Corrosion-resistant protective coating
- Precision manufactured for consistent performance
- Long-lasting permanent magnet
- Suitable for industrial, commercial, decorative, and DIY applications
Common Applications
- Electronics and PCB assemblies
- Sensors and reed switches
- Product manufacturing
- Precision engineering
- Magnetic closures
- Robotics and automation
- Scientific instruments
- Model making
- Arts, crafts, and custom projects
- Magnetic locating and alignment systems
Ideal For
- Engineers
- Product designers
- Electronics manufacturers
- OEM manufacturers
- Cabinet makers
- Research laboratories
- Makers and hobbyists
- Educational STEM projects
Why Choose a Copper Coated Neodymium Cylinder Magnet?
The 4mm x 10mm N38 Copper Coated Neodymium Cylinder Magnet offers an excellent balance of compact dimensions, dependable magnetic strength, and an attractive premium finish. Its longer cylindrical design creates a deeper magnetic field than shorter magnets of the same diameter, making it particularly effective in recessed mounting holes, magnetic couplings, alignment systems, and compact mechanical assemblies.
The distinctive copper coating also makes this magnet an excellent choice for applications where the magnet remains visible, providing both reliable performance and a sophisticated appearance.
Technical Specifications
- Material: Neodymium Iron Boron (NdFeB)
- Magnet Grade: N38
- Shape: Cylinder
- Diameter: 4mm
- Length: 10mm
- Magnetisation: Axial (through the length)
- Coating: Copper
- Magnet Type: Permanent Rare Earth Magnet
Please Note
This is a high-strength rare earth magnet and should be handled carefully. Despite its small size, it can attract steel objects or other magnets with considerable force, potentially causing pinch injuries or damage if allowed to snap together.
Maximum holding force is achieved under ideal conditions using a clean, flat, thick mild steel surface with full end-face contact. Actual holding performance will vary depending on the material thickness, air gap, surface finish, mounting arrangement, and operating environment.
Keep away from children, as small magnets present a serious swallowing hazard. Also 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 impact. While the copper coating provides excellent corrosion protection and an attractive finish, avoiding excessive abrasion and exposure to harsh chemicals will help preserve its appearance over time.
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.
