Neodymium Ring Magnet - (OD)20mm x (ID)4mm x (H)12.7mm

Product code: 23007A

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Neodymium Ring Magnet - (OD)20mm x (ID)4mm x (H)12.7mm

Product Code 23007A
Pull Force* 10.59 kg
Weight 14 gm
Style Rare Earth Ring Magnet
Gauss -1274
Grade N38
Tolerance +/- 0.05mm
Coating Nickel (NiCuNi)
Direction of Magnetisation Axially magnetised through the 12.7mm
Dimensions Outside Diameter:20mm, Inside Diameter:4mm, Thickness:12.7mm
*Measured against up to 10mm mild steel.
Neodymium Ring Magnet - (OD)20mm x (ID)4mm x (H)12.7mm

Magnetic Product Description:

This Neodymium Ring Magnet has an outside diameter of 20mm, inner diameter of 4mm, and thickness of 12.7mm, and is referred to as AMF Magnets part number 23007A. This Rare Earth ring magnet has a pull force of 10.59 kilograms.

Uses for our Rare Earth Ring Magnets:

The inside diameter represents the void area that is common to all Ring Magnets and differentiates them from Disc Magnets. The void allows the ring to slot onto shafts or rods so they can be accurately positioned and easily replaced in a metal separation or a repelling capacity, or in a metal detection function for processing systems. Ring magnets can be positioned on shafts with no need for fasteners or tools for their attachment or removal. This reduces the incidence of metal contamination and increases the time between service intervals for processing equipment that are often in continuous use. In less industrial applications, the hole allows the magnet to be attached with string, plastic cable ties or wire, making it possible to adhere any object magnetically to steel surfaces. This can include decorations, information, artwork or cloth material for temporary or semi-permanent attachment.

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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.