What should you keep magnets away from

They have a vast array of uses in a variety of industries, but like anything, they need to be taken care of and maintained to last. Here are some simple tips on how you can take care of your magnets to expand their lifespan.

Humans have had a very interesting relationship with magnets throughout the past centuries. Now that the potential of magnets is crystal clear, it's important to protect and maintain them, so they can last as long as possible. Here are a few tips on how you can do just that. Storing your magnets in the correct fashion can strongly aid in the length of their lifespan. To get the most out of your magnets:. Many factors can play a role in the weakening of your magnets. Follow these simple tips to keep your magnets strong and useful:.

Magnets will come with either casing or coating to protect them from corrosion or bumps. Generally, the coating will be rubber, which can be replaced if it becomes cracked or torn which can sometimes occur after being exposed to the elements for an extended period. Look for a supplier like Jobmaster Magnets who not only have an abundance of magnets on hand, but who fully understand how they work and the best way to use and protect them. The B r value is measured under closed-circuit conditions.

A closed-circuit magnet is not of much use. In practice, you will measure a field that is less than 12, Gauss close to the surface of the magnet. The actual measurement will depend on whether the magnet has any steel attached to it, how far away from the surface you make the measurement, and the size of the magnet assuming that the measurement is being made at room temperature.

The surface field strength of the earth is about 0. A range from 0. For a circular magnet with a radius of R and length L, the field B x at the centerline of the magnet at distance X from the surface can be calculated by the following formula, where B r is the residual induction of the material :.

There are additional formulae that can be used to calculate the field from a rectangular magnet and magnets in other configurations. Use our on-line calculators to determine your own field levels. Only materials that are attracted to a magnet can "block" a magnetic field.

Depending on how thick the blocking piece is, it will partially or completely block the magnetic field. Magnetic poles are the surfaces from which the invisible lines of magnetic flux emanate and connect on return to the magnet.

The north pole is defined as the pole of a magnet that, when free to rotate, seeks the north pole of the earth. In other words, a magnet's north pole will seek the earth's north pole. Similarly, the south pole of a magnet seeks the south pole of the earth. Yes, the north or south pole of a magnet can be marked if specified. You can't tell by looking. You can tell by placing a compass close to the magnet. The end of the needle that normally points toward the north pole of the earth would point to the south pole of the magnet.

Likepoles repel and unlike poles attract. When opposite poles of a magnet are brought together, the lines of force join up and the magnets pull together. When like poles of a magnet are brought together, the lines of force push away from each other and the magnets repel each other. Most modern magnet materials have a "grain" in that they can be magnetized for maximum effect only through one direction. This is the "orientation direction", also known as the "easy axis", or "axis". Un-oriented magnets also known as "Isotropic magnets" are much weaker than oriented magnets, and can be magnetized in any direction.

Oriented magnets also known as "Anisotropic magnets" are not the same in every direction - they have a preferred direction in which they should be magnetized. Here are the three important properties that characterize magnets for some of the most common magnet materials used today:. Given a magnet size, you can estimate how much magnetic flux different materials will project at a given distance. You can also use this information to compare one material to another.

Example: How much more flux will a neodymium grade 35 magnet project as compared to a ceramic grade 5 of the same dimension at a given distance? This means that the neo grade 35 will project 3. Given the flux required at some fixed distance from the magnet, you can use this information to estimate what magnet volume will be required for different magnet materials. Example: What volume of ceramic-5 magnets would give the same flux as a neodymium grade magnet at a given distance?

This means that the volume of the ceramic-5 magnets would have to be 9. The maximum temperature at which a magnet will be effective depends greatly on the permeance coefficient, or "Pc" of the material. The Pc is a function of the magnetic circuit in which the magnet operates. Magnets should NOT be considered toys, and should be kept away from individuals who will utilize them for something other than their intended purpose. Children should be instructed to be extremely careful and not swallow any magnet.

Magnet should never be ingested. If ingested, seek immediate medical attention as it can cause serious or fatal results. Magnets can pinch and break bones. Use extreme caution when handling magnets to avoid magnets snapping or slamming together.

Do not put hands, fingers or any other body parts between magnets. Use caution to keep magnets at a safe distance from metals, steel and other magnets to avoid instant impact, splintering or breakage. Magnets, especially neodymium and samarium cobalt, are very hard and brittle and can chip.

When handling magnets in an environment where they could shatter or break, it is recommended that eye protection be worn. Computer Hard Drives Inside many computer hard drives, there is a small neodymium magnet.

Phones The same premise for computers can be applied to phones. Televisions Older televisions with Cathode-Ray tubes, can be affected by magnetic fields. Pacemakers Magnets should never come in contact with anyone that has a pacemaker. Anything with Magnetic Data Cassette tapes, video tapes and floppy disks are just a few examples of storage devices that use magnetic tape to store data.

Categories: Neodymium Magnet Information. Posted By: admin.