Neodymium

Neodymium sphere magnetsIn chemical terms, Neodymium is one of the Lanthanide series of rare earth metals and appears as element number 60 on the Periodic Table. Neodymium magnets themselves are actually made of a combination of Neodymium, Iron and Boron and hence they are sometimes referred to as Neodym, Neod, Neo, NIB or NdFeB.

Magnets made from Neodymium are very strong and versatile and are supplied to work at normal room temperatures. Magnets are available to work at higher temperatures but these are more expensive.

Neodymium magnets are usually coated in nickel, tin, zinc, phosphate, gold, silver, PTFE (known under the trade name Tefl on) or epoxy resin to prevent the iron core of the magnet rusting. Uncoated Neodymium magnets are also available.

At Guy’s Magnets we stock disks, rods, cubes, spheres, rings and blocks from grades 30-52. Neodymium magnets have a relatively low maximum operating temperature of 80C. The majority of our magnets have this temperature band, however, we do stock some H (120C), SH (150C) and UH(180C) grades.

Neodymium magnets are often used for special effects in films such as Harry Potter, Tomb Raider and Thunderbirds. In Harry Potter and Thunderbirds they were used to make things appear to levitate, while in Tomb Raider they were used to hold ‘bombs’ underneath a table! They are also used to levitate Maglev trains, which are both faster and quieter than wheeled carriages, and are capable of reaching speeds of 581 km/h (361 mph).

Neodymium magnets have also been used in water conditioners, fuel efficiency devices, magical tricks, sensors, speakers, separators, holding devices, actuators, magnetic bearings and motors. They are also found in slot car games like Scalextric and for holding dummies to the reborn berenger dolls. Some of our product range is even found in a well known manufacturer’s domestic boiler! Other uses can be seen here.

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Hi, Last year I bought 100 Strong Neodymium Block Magnets 5x5x2 mm NdFeB craft from you. I want to tell you how pleased I am with them. I used them to hold up the walls of my 12th scale church which was made of foam board and that means I can colapse it for carrying. Just great! It was featured in Dolls house magazine in this January (2012) edition.

Last week my Husband had to find a way to attach a union flag to a steam locomotive for the renaming (Britannia) yesterday. He couldn't think of a way but I thought I could fix in some of these little magnets. So I did sew four into the top hem of the flag and they worked so well that the loco crew who fixed it in place were so impressed that they will be using that idea next time. Fixing a flag to 'Tornado' was a lengthy business the other year.

So thanks for the magnets. Prince Charles found no difficulty in unveiling the nameplate and everyone was well chuffed.

The Yorkshire Post web site has a film (http://bit.ly/AyDzs9). Thanks

- J M Greenwood, Rugby