Neodymium Ring Magnet OD10mm x H3mm | Hole 4mm N42
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This Rare Earth Neodymium Ring Magnet is 10mm in outer diameter and has an inside diameter of 4mm with a 3mm thickness. This Nickel plated ring magnet has an N42 grade and a pull force of 1.39kgs.
Ring magnets are an extremely popular shape for sign makers, or anyone wanting to use a hidden fixing method that is able to be regularly attached and detached. Sign makers have been using these magnets for years in the design of clever rotating or transitioning billboards and outdoor advertising signs.
Curtain and blind makers, along with professional interior designers find ring magnets an indispensable tool for fastening and holding fabric or soft furnishings. Magnets transfer their holding power through materials, without breaching the material itself. Able to be stitched in without damaging the textile or the magnet they are the perfect solution to keeping drapes or fabric neatly in place. These ring magnets are in constant demand, in school projects, arts and crafts and display advertising.
Neodymium or Rare Earth magnets are the strongest permanent magnets commercially available and are the ideal magnet if you require the highest magnetic strength possible. They are up to seven times stronger than more traditional magnets such as Ferrite and Alnico magnets and come in an extensive range of sizes, shapes and grades. Rare Earth magnets are magnetically stable and have a strong resistance to demagnetization however they are not suitable for use in high temperature applications.
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.
