Neodymium Ring Magnet - (OD)30mm x (ID)10mm x (H)4mm | N42

Product code: R-OD30H4ID10

$30.47 for 1 to 9 items
$27.21buy 10 to 99 itemsand save 10%
$23.77buy 100+ itemsand save 21%

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Neodymium Ring Magnet - (OD)30mm x (ID)10mm x (H)4mm | N42

Product Code R-OD30H4ID10
Pull Force* 8.88 Kg
Weight 70 gm
Style Rare Earth Ring
Coating Nicke
Direction of Magnetisation Axially (through height)
Dimensions Outside Diameter:30mm, Inside Diameter:10mm, Thickness:4mm
*Measured against up to 10mm mild steel.

Magnetic Product Description:

This neodymium magnetic ring has an outer diameter of 30mm, an inner diameter of 10mm and a height of 4mm. It is identified by the AMF magnet part number R-OD30H4ID10.

Uses for our rare earth ring magnets:

Neodymium Ring magnets use Rare Earth magnetic material that is both permanently active and strong. The circular shape is similar to that of disc-shaped magnets, as is the direction of the magnetism, which usually travels between the flat round faces where the North and South poles are found. The round void area in the centre of the ring reduces the volume of magnetic material compared to solid Disc shape magnets, however, Ring magnets have other benefits that compensate for this relative reduction in volume and magnetic power. Neodymium Ring magnets can fit onto non-ferrous shafts or be held in place within a device by a round, raised plastic lug. Ring magnets secured with this practical method do not require glue or the common metal fasteners that can add weight to a device or interfere with magnetic fields. Strong magnetic fields emitted by Neodymium ring magnets are useful in the operation of sensors, switches and electrical equipment used in process monitoring and sound transmission.

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.