Neodymium Magnets

Neodymium Magnets (known as NdFeB or Neo) are now the most widely used type of magnet material. Neodymium Magnets are permanent magnets which are produced from a composition of neodymium, iron and boron. The material remains the strongest type of permanent rare earth magnets currently available.

You are sure to find Neodymium Magnets in some modern products such as; hard drives, microphones, speakers, electric motors, headphones, magnetic bearings, drive motors for hybrid and electric motors. You would also find neodymium magnets in your Dyson Vacuum!

What are Neodymium Magnets

Let us firstly look at the raw material; Neodymium. The material Neodymium (Nd) is a rare earth element located on the periodic table of elements at 60. Neodymium is more prone to give a reaction and combining with other elements and quickly oxidizes by combining with oxygen in the air.

Neodymium Magnets is an alloy made up of neodymium, iron and boron. They are often referred to as NIB or NeFeB magnets. They are produced in two forms; sintered and bonded. You will find sintered magnets to be the most popular as they have a greater performance. You will generally find bonded magnets in applications that require special shapes.

How do i know which magnet is right for me?

It is sometimes hard to know which magnet is right for you. We offer many different sizes and sometimes this means the task of choosing one can be slightly daunting.

When looking to choose a magnet, we generally take the following factors into consideration;

  • Air Gap – is there any gap between the magnet and its contact point (whether it be steel or another magnet)…? It is important to remember the air gaps will reduce the performance of a magnet considerably.
  • Permeability – how permeable is the material you’re using (e.g. steel)…? It is often forgotten that the material you stick magnets to can only hold so much magnetism before it is saturated. We often relate it to a bucket a water which once full... can’t be made ‘fuller’.
  • Position – is the magnet being used in a shear or vertical position…? It is much easier (approximately five times) to slide a magnet than it is to pull it off vertically.
  • Temperature – Will the magnets be used in an environment that has high temperatures…?
  • Area in Contact – what is the area in contact between the magnet(s) or magnet and steel?

The above list is an example and dependent on the application, we may look at other factors which could potentially effect the magnetic performance.

If you have any doubts at all, we have a friendly technical department that is always happy to give guidance and will point you in the right direction. You can contact our Technical Department on 0845 519 4701 (Mon – Fri 0830 – 1700).