Neodymium Ring Magnet - (OD)5mm x (ID)2.5mm x (H)4mm | N42UH | Diametrically Magnetised

Product code: 23023A

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$1.82buy 10 to 99 itemsand save 10%
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Neodymium Ring Magnet - (OD)5mm x (ID)2.5mm x (H)4mm | N42UH | Diametrically Magnetised

Rated 5.0 out of 5
Based on 1 review
Product Code 23023A
Pull Force* 0.789 kg
Weight 1 gm
Style Rare Earth Ring magnet
Coating Nickel (Ni)
Direction of Magnetisation Diametrically Magnetised
Dimensions Outside Diameter:5mm, Inside Diameter:2.5mm, Thickness:4mm
*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 2.5mm and a height or thickness of 4mm. It has a pull force of 789 grams. It is identified by the AMF magnet part number 23023A.

Uses for our Rare Earth Ring Magnets:

This small Neodymium Ring magnet is unusually magnetised through the diameter or in other words Diametrically Magnetised. It is also manufactured in a very high-grade N42 high temperature material that is heat resistant up to 180º Celcius. Magnets like this are for specialised commercial processes and for use in component parts that may be subject to high temperatures that would cause normal grade magnets to become demagnetised and fail. Small Ring magnets are found in products like electronic communication equipment, laptop computers and smart devices.

average rating 5.0 out of 5
Based on 1 review
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100% of reviewers would recommend this product to a friend
1 Review
Reviewed by Tristan
I recommend this product
Rated 5 out of 5
Review posted

good quality

Arrived on time an tracking update was excellent.

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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.