Precautions for using magnets

caveat

It is extremely dangerous to bring a magnet close to a person wearing an electronic medical device such as a pacemaker or other electronic medical devices.It may impair the normal operation of the medical device.please note.
Be careful not to swallow the magnet.Swallowing magnets can lead to choking and necrosis of organs, and retention in the body can require laparotomy.If swallowed, consult a doctor immediately.To prevent accidental ingestion, keep magnets out of the reach of children. ((Related Links）

Notes

If you have an allergic reaction to metals, your skin may become rough or red when you touch the magnet.Do not touch the magnet if you experience any of these symptoms.Never lick the magnet or drink water that touches the magnet, as the components of the magnet may dissolve in water and cause symptoms such as abdominal pain.
Bringing magnets closer may destroy or magnetize the recordings on magnetic recording media (floppy disks, magnetic cards, magnetic tapes, prepaid cards, tickets, MOs, MDs, etc.) and make them unusable.Please keep away.
Bringing magnets close to various electronic devices, video devices, and communication devices (speakers, CD / DVD players, cathode ray tubes, mobile phones, watches, etc.) may interfere with normal operation or lead to malfunction.Please keep away.
Bringing a magnet close to an electronic control device or bringing it into an aircraft may affect the instrument panel and control panel, resulting in a malfunction or accident.Please do not bring it close to you.

design

The magnetic characteristics of anisotropic magnets differ greatly depending on the direction of magnetization.When designing, pay attention to the direction of anisotropy.
The magnetic characteristic values in the catalog are not guaranteed values at the time of use.Depending on the dimensions and shape of the magnet used, the magnetic characteristic values as shown in the catalog may not be obtained.Please check with a sample etc. in advance.
Magnets are generally heated to reduce the magnitude of their magnetization.In addition, it loses its magnetization at the Curie point.The rate of decline also varies greatly depending on the operating point used.Refer to the temperature characteristics and design the magnetic circuit so that the temperature does not rise too much during assembly or use and the demagnetization is as small as possible.
Ferrite magnets may be demagnetized at low temperature depending on the material and shape.Be sure to check the material characteristics at the temperature at which you use it.
When the customer magnetizes the magnet, please apply a sufficient magnetic field according to the material and coercive force.If the magnetic field strength is insufficient, the magnetic characteristics as designed may not be obtained.Please contact us for the magnitude of the magnetic field required for magnetization.
Weather resistance varies depending on the material of each magnet, so if you anticipate a problem, please contact us in advance regarding rust prevention. (Please also refer to Section 4 of "Storage" below.)
If the customer cuts or disassembles the magnet, the magnet characteristics may deteriorate or magnetization may be poor, so please refrain from doing so.If the product is processed by the customer, we cannot guarantee that it will be chipped or cracked during processing or use.
Magnets are hard and brittle.When it is used for applications such as automobiles where vibration is applied, please maintain the strength by adhering it to the yoke and pay attention to the design so that it will not fall off even if it breaks.
When using an adhesive to bond a magnet to a magnet, yoke, pole piece, etc., carefully consider the type, amount, bonding conditions, strength, etc. of the adhesive and check the reliability.
Magnets may be destroyed in high-speed rotating objects such as motors.When designing, take measures to prevent debris from scattering even if it is destroyed.
When processing such as press fitting or shrink fitting, there is a risk that the characteristics of the magnet will deteriorate or the magnet or mating material will crack.Please be sure to check the sample in advance.
Since the leakage magnetic flux may affect other equipment, design the magnetic circuit so that the leakage is as small as possible.

Assembly and handling

Magnetized magnets have a strong attractive force (or repulsive force between magnets).Hands and fingers may get caught between magnets or magnetic materials such as magnets and iron pieces, knives, and scissors, resulting in unexpected injuries.In addition, strong impact due to attractive force (or repulsive force between magnets) may cause the magnets to crack and scatter, causing debris to get into your eyes.Please handle with care by wearing gloves and protective goggles and using appropriate jigs.
The sharp edge of the magnet may injure your hands or fingers.Please handle with care.
When magnetizing using an air-core coil, the magnet may suddenly pop out of the coil and cause injury, which is dangerous.For safety, place the magnet in the center of the coil and secure it.
When stacking magnetized magnets, the magnets may be difficult to separate or chip.When stacking, it is recommended to insert a spacer between them.
When processing a magnet for cutting, chips may spontaneously ignite.Please note the following about chips.
① Never bring fire and combustibles close to each other.
② Do not use a vacuum cleaner.
③ Prepare a powder digester, sand, etc. in case of ignition.
If the magnetized magnet is brought close to an AC or DC magnetic field, it may be demagnetized.If a neodymium magnet or Samakoba magnet with strong magnetic force is attracted to or repelled by a ferrite magnet, alnico magnet, or rubber magnet, the latter magnet may be demagnetized, so handle with care.
Be careful of the handling environment because magnetized magnets easily adsorb dust such as iron powder.Cleaning may be required after assembly.
When bonding a magnet to a yoke, etc., select an adhesive and bonding method that will not leave mechanical distortion after bonding.If used with residual stress applied, the magnet may crack with a slight impact.Be careful not to allow foreign matter such as oil or dirt to adhere to the adhesive surface.Adhesive strength may decrease and it may fall off.
Handle the magnet with care as it is vulnerable to impact and is prone to chipping and cracking.If chipping or cracking occurs during handling, there is a risk of characteristic deterioration or strength deterioration.Also, be aware that broken debris may get into your eyes or you may be injured by the debris.
Neodymium magnets rust when the surface treatment plating or paint is peeled off by external impact such as adsorption.If you hit or drop the magnet, make sure that the plating and paint have not come off before using it.Also, do not use the one with the plating or paint peeled off.
There is no magnetic effect on small chips or cracks in the magnet.Please note that we are not responsible for any chipping or cracking during handling after purchase.

Storage

Magnets are generally made of many materials that are easily chipped, so care must be taken when handling them.Store it in a place where it will not be subject to impact.
For magnets that are magnetized, clearly indicate that they are magnetized and cover them with a non-magnetic material such as a wooden box.
To prevent the formation of rust, avoid storing at a temperature below the dew point of water vapor, and be careful not to get it exposed to rainwater.Surface conditions, physical properties, and magnetic properties may change.
Please avoid using and storing in the following environments.It may cause magnet corrosion and deterioration of characteristics and strength.
- Corrosive gas (Cl2, NH3, SOx, NOx, etc.)
- Highly conductive environment (water containing electrolytes, etc.)
- In a hydrogen atmosphere
- Acidic, alkaline, organic solvent, etc.
- In water, in oil
- Hot and humid environment
- Open-air outdoor
- Radiation above background levels