Neodymium Ring Magnet - (OD)12.7mm x (ID)3.175mm x (H)3.175 mm | N45

Product code: R-OD12.7H3.175ID3.175-N45

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Neodymium Ring Magnet - (OD)12.7mm x (ID)3.175mm x (H)3.175 mm | N45

Product Code R-OD12.7H3.175ID3.175-N45
Pull Force* 2.98 kgs
Weight 15 gm
Style Rare Earth Ring
Coating Nickel
Direction of Magnetisation Axially (through height)
Dimensions Outside Diameter:12.7mm, Inside Diameter:3.175mm, Thickness:3.175mm
*Measured against up to 10mm mild steel.

Magnetic Product Description:

This neodymium magnetic ring has an outer diameter of 12.7mm, an inner diameter of 3.175mm and the height of 3.175mm. It is identified by the AMF magnet part number R-OD12.7H3.175ID3.175-N45.

Uses for our rare earth ring magnets:

The majority of our magnets come in metric dimensions however this Rare Earth Neodymium ring has standard imperial measurements of ½ inch outer diameter and ‚Öõ inch inside diameter and height. Imperial measurements are popular for anyone looking for neo magnets to insert into English or American made products. We are frequently contacted by customers who are looking to replace a poor quality magnet that came as a standard component within a product or piece of equipment with a strong neodymium magnet of superior quality. Neodymium magnets come in a range of grades with N35 being the weakest and N52 being the strongest. As such, this N45 magnet is significantly more powerful than an N35 grade magnet which is the standard grade of magnet used in the majority of mass-produced products.

Although only 15 grams in weight, this small rare earth ring has a surprisingly strong pull force of almost 3 kgs. This pull force is best explained as a vertical lift of steel which is 10mm thick, to allow for full saturation of the magnetic field. There are many factors that will have a diminishing impact on the magnet achieving its full holding power, for more information please read our FAQ articles.

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.