Neodymium Disc Magnets
A Neodymium disc magnet is a relatively new addition to the world of magnetic fields. These rare and extremely strong magnetic materials, which are more than one third of the weight of a magnet, are made in a variety of shapes and sizes and are often used as components of other kinds of magnets. They are most commonly used as a component of a spring design or other large strong magnetic device. The most popular ones tend to be very big and are often referred to as ‘ferromagnetic beads’ because of their relative size. There are many kinds of neodymium disc magnets but they all have the special property of being attracted to each other in a way that causes an intense attraction, or mutual repulsion, that allows them to cancel or give off opposite charges when placed near each other.
The highest strength permanent neodymium disc magnet currently available are titanium (Nd), made of a special alloy of titanium boron and neodymium (which is another metal with similar properties), to form the Nd2Fe fourteen B structure. These beads are often used in counter top applications and can be found for sale online or in some cases in retail stores in several different configurations, sizes and finishes. Some are coated with a special resistant adhesive tape that holds them to the counter while others may simply use the standard sticky tape found on kitchen counters. Some of these magnetic beads are coated for surface adhesion while others are coated with a protective layer of polyurethane foam.
One unique property of this rare earth disc magnet is that they have a very high pull force, which is much higher than the overall pull force of any known solid-state component, including the number one most used component, the push rod that connects a refrigerator to the rest of your mechanical system. This is due primarily to the unique design of the magnetic field core of the bead. Due to their high pull force, you may find that applying even small amounts of torque to your wrench will not easily stop the magnetic pull because the core is so tightly packed that even very strong torque cannot penetrate the interior of the bead.