Catalog > Internet of Things (IOT) Related Products > More Platforms N50 Round Neodymium Magnets with Countersunk Ring 15x4mm N50 15x4mm Strong Round Neodymium Countersunk Ring 4mm Hole Magnet DHG N50 ROUND MAGNET 15X4MM 2/PK MAGNET-RARE EARTH NEODYMIUM R50 ROUND COUNTERSUNK RING 4MM HOLE (NdFeB) 15X4MM Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Overview Neodymium (chemical symbol Nd) is element 60 on the periodic table. It is a rare earth metal and forms one of the Lanthanides series. When added to Iron (Fe) and Boron (B) (chemical formula Nd14Fe21B) the resultant magnets are the strongest magnets currently available. Neodymium magnets are sometimes known as Neo, Neod or NIB magnets.Neodymium magnets are usually coated Nickel-Copper-Nickel plating to prevent the iron from rusting.Neodymium block magnet was made of NdFeB, have strong magnetic performances and appearance does not rust, usually placed in room temperature, the maximum operating temperature is 80 ° C , and it never will demagnetization. Features Applications :Acoustic field : speaker, receiver, microphone, alarm, stage audio, car audio and so on.Electronics : permanent magnetic actuator vacuum circuit breakers, magnetic relays, meter, sound meter, a reed switch, sensors.Electrical field : VCM, CD / DVD-ROM, generators, motors, servo motors, micro-motors, vibration motors.Machinery and Equipment : magnetic separation, magnetic crane, magnetic machinery.Healthcare : MRI scanners, medical equipment, magnetic health products and so on.Other industries : magnetized Wax, pipe descaling, magnetic fixture, automatic mahjong machine, magnetic locks, doors and windows magnetic, magnetic luggage, leather magnetic toys, magnetic tools, gifts and packaging.Tip :Strong magnets should be kept away from Ironware and some easily magnetized iron products, such as monitors, bank cards, computers, televisions, mobile phones and othersStrong Magnets should be stored in a dry, heated environment and use Plastic, Wood, Cardboard or Foam to separate it when wrappedMagnets may affect Water Meters, Electric Meters, Gas Meter and other Meters if Magnets are placed near the Meter. The Meter will slow down and inaccurate readings may occurNote : Please be careful fragile and take care to break it apart. Specifications Shape : Disc RoundMagnetic face : 15mm x 4mm (Dia. x Thickness )Hole Dia. : 4mmPlating : Ni-Cu-Ni ( Nickel )Material : NdFeBGrade : N50Color : Silver