Neodymium Ring Magnet - (OD)25mm x (ID)12mm x (H)5mm | N38

Product code: R-OD25H5ID12-N38

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Neodymium Ring Magnet - (OD)25mm x (ID)12mm x (H)5mm | N38

Product Code R-OD25H5ID12-N38
Pull Force* 8 kg
Weight 10 gm
Style Rare Earth Ring
Coating Nickel
Direction of Magnetisation Axially (through height)
Dimensions Outside Diameter:25mm, Inside Diameter:12mm, Thickness:5mm
*Measured against up to 10mm mild steel.

Magnetic Product Description:

This neodymium magnetic ring has an outer diameter of 25mm, an inner diameter of 12mm and the height of 5mm. It is identified by the AMF magnet part number R-OD25H5ID12-N38.

Uses for our rare earth ring magnets:

Magnets made from Neodymium material offer the strongest magnetic power available. Ring-shaped magnets are a very popular shape with both manufacturers and general consumers. Strong Ring magnets can reduce scale in water pipes, act as closure mechanisms for cabinetry, create motion in electric motors and detect metal in their proximity which can then activate sensors, switches and warning signals. Ring-shaped magnets are simple to attach to other surfaces. Any type of wire or cord can be looped through the central hole to secure the magnet in the appropriate position. Some of the most important traits of magnetic hold are its permanence and the remote and frictionless way it operates. Electricity and moving mechanical parts are not necessary in order for magnets to hold and attract ferrous material or to bond with other magnets.

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NB: Ranges are indicative for product category, please check individual products for specic values within that range.

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.

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.

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.