Neodymium Disc Magnet 9.5mm x 3.2mm | Teflon Coated | N42SH | High Temperature ≤150ºC
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Neodymium Disc Magnet – 9.5mm x 3.2mm | Teflon Coated | N42SH | High Temperature
The Neodymium Disc Magnet 9.5mm x 3.2mm | Teflon Coated | N42SH | High Temperature is a premium rare earth permanent magnet engineered for demanding applications where strong magnetic performance, elevated temperature resistance, and superior chemical protection are required. Manufactured from high-quality N42SH-grade Neodymium Iron Boron (NdFeB), this compact disc magnet measures 9.5mm in diameter and 3.2mm thick, making it ideal for industrial automation, electronics, laboratory equipment, robotics, and precision engineering.
Unlike standard nickel-plated neodymium magnets, this version features a durable PTFE (Teflon) coating, providing outstanding resistance to chemicals, moisture, corrosion, and surface wear. The low-friction Teflon surface also reduces abrasion and sticking, making it an excellent choice for applications involving repeated movement, sliding contact, or exposure to harsh operating environments.
The N42SH (Super High Temperature) grade enables this magnet to operate continuously at temperatures of up to 150°C, making it well suited to electric motors, generators, heating equipment, industrial machinery, automotive components, and electronic assemblies where conventional neodymium magnets may lose magnetic strength.
This magnet is axially magnetised, meaning the north and south poles are located on the two flat circular faces, delivering maximum holding force when mounted flat against a ferrous steel surface or stacked with other magnets.
Key Features
- Premium N42SH-grade neodymium rare earth magnet
- High-temperature operation up to 150°C
- Dimensions: 9.5mm diameter x 3.2mm thick
- Durable PTFE (Teflon) protective coating
- Excellent resistance to corrosion, chemicals, and moisture
- Low-friction surface reduces wear and abrasion
- Axially magnetised for maximum face-to-face holding strength
- Precision manufactured for consistent magnetic performance
- Long-lasting permanent magnet
Common Applications
- Industrial automation systems
- Electric motors and generators
- High-temperature sensors
- Robotics and motion control
- Scientific and laboratory equipment
- Electronics manufacturing
- Medical and analytical equipment
- Magnetic fixtures and tooling
- OEM manufacturing
- Precision engineering and custom machinery
Ideal For
- Mechanical engineers
- Electrical engineers
- Automation specialists
- OEM manufacturers
- Product designers
- Research laboratories
- Maintenance technicians
- Industrial equipment manufacturers
Why Choose a Teflon Coated N42SH High Temperature Disc Magnet?
The 9.5mm x 3.2mm Teflon Coated N42SH Neodymium Disc Magnet is designed for environments where heat, moisture, chemicals, and repeated mechanical contact demand more than a conventional neodymium magnet can provide. The N42SH grade delivers reliable magnetic performance at operating temperatures of up to 150°C, while the PTFE (Teflon) coating provides exceptional resistance to corrosion, chemical exposure, and surface wear.
Its compact disc design offers a large magnetic contact area relative to its size, making it ideal for magnetic mounting, positioning, sensing, alignment systems, and moving assemblies where durability, reliability, and heat resistance are essential.
Technical Specifications
- Material: Neodymium Iron Boron (NdFeB)
- Magnet Grade: N42SH
- Shape: Disc
- Diameter: 9.5mm
- Thickness: 3.2mm
- Magnetisation: Axial (through the thickness)
- Maximum Recommended Operating Temperature: 150°C
- Coating: PTFE (Teflon)
- Magnet Type: Permanent Rare Earth Magnet
Please Note
This is a high-strength rare earth magnet and should be handled carefully. Strong neodymium magnets 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 achieved 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.
Although this N42SH magnet is designed for continuous operation at temperatures of up to 150°C, prolonged exposure above this temperature may result in permanent loss of magnetic strength. Keep away from children, 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 under excessive mechanical stress. While the PTFE (Teflon) coating provides excellent protection against corrosion, chemicals, and abrasion, avoiding unnecessary mechanical damage will help maximise the magnet's service life.
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.
