Neodymium Disc Magnet 101.6mm x 25.4mm N38
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Neodymium Disc Magnet – 101.6mm x 25.4mm | N38
Designed for demanding industrial applications, this Neodymium Disc Magnet measures 101.6mm (4") in diameter x 25.4mm (1") thick and is manufactured from premium N38-grade NdFeB (Neodymium Iron Boron) rare earth magnetic material. Delivering exceptional magnetic strength and a large contact surface, this heavy-duty permanent magnet is ideal for engineering, manufacturing, automation, magnetic separation, research, and specialised holding applications.
Neodymium magnets are the strongest commercially available permanent magnets, offering significantly greater magnetic performance than ferrite, Alnico, or samarium cobalt magnets of comparable size. With its 101.6mm diameter and substantial 25.4mm thickness, this magnet provides an impressive magnetic field and outstanding holding power for applications requiring maximum performance.
This disc magnet is axially magnetised, meaning the magnetic poles are located on the two 101.6mm circular faces, providing maximum magnetic contact and holding force when placed against a ferrous steel surface or incorporated into a magnetic assembly.
Finished with a durable nickel-copper-nickel (Ni-Cu-Ni) coating, the magnet offers excellent resistance to corrosion and wear while maintaining a smooth, polished surface for long-term industrial use.
Features & Benefits
- Premium N38-grade rare earth neodymium disc magnet
- Dimensions: 101.6mm diameter x 25.4mm thickness (4" x 1")
- Axially magnetised for maximum face-to-face holding performance
- Extremely high magnetic strength
- Large magnetic contact area
- Durable nickel-copper-nickel (Ni-Cu-Ni) coating
- Precision-manufactured for consistent quality
- Long-lasting permanent magnet
- Suitable for heavy-duty industrial applications
Common Applications
- Heavy-duty magnetic holding
- Industrial automation
- Manufacturing and engineering
- Magnetic separation equipment
- Machine fixtures and tooling
- Research and laboratory equipment
- Product development
- Custom magnetic assemblies
Ideal For
- Mechanical engineers
- Industrial manufacturers
- OEM equipment builders
- Research laboratories
- Automation specialists
- Fabrication workshops
- Mining and processing industries
- Prototype development
Why Choose a Large N38 Neodymium Disc Magnet?
The 101.6mm x 25.4mm N38 Neodymium Disc Magnet provides exceptional holding power and a large magnetic contact surface, making it ideal for demanding applications where maximum magnetic performance is essential. Its substantial thickness delivers increased magnetic energy, while the disc profile allows easy integration into magnetic fixtures, clamping systems, separation equipment, and custom-engineered solutions.
Please Note
This is an extremely powerful industrial magnet and should only be handled by experienced users using appropriate safety precautions. The strong magnetic forces generated can cause severe pinch or crush injuries if handled incorrectly.
Holding performance is achieved under ideal conditions using a clean, flat, thick ferrous steel surface with full face-to-face contact. Actual magnetic strength will vary depending on the steel thickness, surface finish, air gap, and application.
Keep well away from children, pacemakers, implanted medical devices, sensitive electronic equipment, magnetic storage media, and precision instruments. Due to its size and magnetic force, suitable lifting equipment or multiple-person handling may be required during installation. Avoid drilling, machining, excessive heat exposure, or heavy impacts, as these may permanently damage the magnet or reduce its magnetic performance.
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.
