Neodymium Ring Magnet OD15mm x H3mm | Hole 5mm N42
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Neodymium Ring Magnets
Powerful Neodymium Ring magnets can be purchased online from the wide range of Frenergy magnetic products which also includes a range of Block and Disc shaped Neodymium magnets. The product range contains Ring magnets in various grades of strength and in a range of width and height dimensions. Another unique and important consideration to take into account when selecting a Ring shaped magnet is the inside diameter(ID) measurement which indicates the diameter of the hole in the middle of the ring. The size of the central hole can be an important factor in determining which method of attachment is used for the magnet in your particular application. Common methods of attachment for all strong rare earth magnets to non-ferrous materials include epoxy glues, brackets and sewing the magnet inside or into soft furnishings or fabrics. Ring magnets can also be held in position with placement over pins or lugs with the same ID dimensions. Commercial products such as electronic devices may employ this method by using plastic casings or moulded synthetic covers with suitable lugs for the Ring magnet to fit over. The magnets are then often used to perform as a magnetic closure device or to operate as magnetic electrical switches. The magnetic aspects of these commercial products give these items a more modern or futuristic feel that appeals to consumers and in many cases, improves their performance. Hobbyists or home-based businesses often use timber or other non-ferrous materials to provide the round lugs that the ring magnet sits on. The magnets can then be used to bond component parts together or to make artistic creations compatible with ferromagnetic surfaces. Screws, tie wire and bolts through the central hole are also commonly used options for attaching the versatile Neodymium Ring 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. 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.
