Product code: 22023
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This rare earth block magnet has a length of 20mm, a width of 10mm and a thickness of 4mm. It has a magnetic flux reading of 3087 and A pull force of 3.5 kilos against 3mm mild steel. It has the AMF magnet part number 22023. It has a centred 4mm countersunk hole with an 8mm head width.
This strong Neodymium Countersunk block magnet is ideal for permanent fastening and popular with carpenters, sheet metal fabricators, aluminium and glazing businesses and hardware retailers. It can be attached to any surface using a readily available flat head screw. One or more of these magnets can be screwed into doors, cupboards, draws or cabinets and will act as a closing device by attracting any metal plate or surface that approaches its magnetic field. N.B. Avoid overtightening the attachment screw in order to prevent damaging the magnet.
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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.
The Pull Force listed for each magnet is based on lifting 10mm thick steel from a horizontal surface. Magnets on a vertical surface (of 10mm thick steel) are generally able to hold around only 30% of the pull force listed in the product description. This is due to the effects of gravity and the lack of friction between the surface and the shiny magnet. Read More
