Neodymium Ring Magnet OD30mm x H4mm | Hole 10mm N42
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Neodymium Ring Magnets
Rare earth magnets have become the magnet of choice for most modern applications because of their superior holding ability and compact size. Neodymium is the strongest of magnetic materials and the permanent power of Neodymium ring-shaped magnets is widely used in the operation of audio equipment such as microphones and loudspeakers, electric motors, medical and scientific equipment, consumer electronics and industrial safety warning systems. These highly technical devices depend on the strong and consistent magnetic power provided by Neodymium magnetic material which allows them to operate reliably. Strong, circular magnetic rings can bond with ferromagnetic materials or can attract other magnets with the North or South pole in the opposite position. Some versions of ring magnets are designed with convenient countersunk central holes to screw the magnet onto other materials, while the central void that typifies all ring-shaped magnets also allows them to be simply tied to another surface with cable or wire.
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. AMF Magnetics 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.
