Neodymium Ring Magnet - (OD)5mm x (ID)2.1mm x (H)5mm | N42

Product code: 23025

$1.63 for 1 to 9 items
$1.45buy 10 to 99 itemsand save 11%
$1.15buy 100+ itemsand save 29%

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Neodymium Ring Magnet - (OD)5mm x (ID)2.1mm x (H)5mm | N42

Product Code 23025
Pull Force* 0.776 kg
Weight 1 gm
Style Rare Earth Ring magnet
Coating Nickel (NiCuNi)
Direction of Magnetisation Axially magnetised thru the 5mm
Dimensions Outside Diameter:5mm, Inside Diameter:2.1mm, Thickness:5mm
*Measured against up to 10mm mild steel.

Magnetic Product Description:

This small rare earth ring magnet has an outside diameter of 5mm, an inside diameter of 2.1mm and a thickness of 5mm. It has a pull force of 776 grams. It is identified by the AMF magnet part number 23025.

Uses for our Rare Earth Ring Magnets:

Smaller, stronger and lighter magnets have helped reduce the size of modern hi-tech equipment. Small yet powerful Neodymium Ring magnets have roles in small electronic devices where the void is used to position the ring over a plastic post or lug. This method avoids heavy and less durable screws or clips and increases product life and reliability. The void area in ring-shaped magnets reduces the strength of the magnet, due to the absent material, but this magnet compensates for this with its higher N42 Grade magnetisation. Magnets can activate the power on/off switches or other operations on devices using their proximity or by reacting to the pole orientation of electromagnetic fields. The concentrated fields of Neodymium ring magnets are used to devise sophisticated industrial and scientific measuring equipment.

No FAQ available

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.