We are well reckoned as the most preeminent
Rare Earth Magnets Manufacturer and one of the overruling Suppliers of the same. Our Strong Rare Earth Magnets are designed and manufactured by well-trained engineers who have proficiency and expertise in the field of manufacturing of Rare Earth Super Magnets. Application of high quality raw material in Rare Earth Circular Magnets manufacturing increases reliability and performance of products.
In general, the elements are melted together and milled into a power that is dry-pressed to shape in the presence of a magnetic field. The material is then sintered, aged, ground to dimension, magnetizem and tested. They are called "Rare Earth" Magnets because the elements of neodymulum and samarlum are classified in the lanthanides section of the Periodic Table of the Elements.
Neodymium magnets (Nd-Fe-B) are composed using Neodymium, Iron, Boron and few transition metals. Samarium Cobalt magnets (SmCo) are composed from samarium, cobalt and iron. These Earth Magnets are extremely strong for their shapes as rings, blocks and discs.
Neodymium
Attributes of Neodymium
- Very high resistance to demagnetization
- High energy for size
- Good in ambient temperature
- High priced
- Material is corrosive and should be coated for long term maximum energy out put
- Low working temperature for heat applications
Application of Neodymium
Neodymium is applied in Magnetic separator, linear actuators, microphone assemblies, servomotors, DC motors (automotive starters), computer rigid disc drives, hammer bank printers, and speakers.
Samarium
Attributes of Samarium
- High resistance to demagnetization
- High energy (magnetic strength is strong for its size)
- Good temperature stability
- Expensive material (cobalt is market price sensitive)
Applications of Samarium
- Computer disc drives
- Sensors
- Traveling wave tubes
- Linear actuators
- Satellite systems
- Motors where temporary stability is vital
Rare Earth Tolerances
For as pressed material, tolerance on the thickness (direction of magnetization) is +/-.127mm. Other Dimensions are +/-2.5% or +/-.254mm, which is greater.
According to Magnet Materials Producers Association (MMPA) standards, visual imperfections such as hairline cracks, porosity and minor chips are commonly found in sintered metallic magnets. A chipped edge is considered acceptable if less than 10% of the surface is missing. Cracks are acceptable as long as they do not extend across more than 50% of pole surface.
Rare Earth Magnetizing and Handling
Rare Earth Magnets are very brittle and magnetically strong. Therefore, it is crucial to handle these magnets with extreme care to avoid personal injury and damage to the magnets. Fingers can be severely pinched between attracting magnets. Magnets can be chip if allowed to “Jump at” an attracting object. It is highly recommended that when constructing rare earth magnetic assemblies, they should be magnetized after assembly.
Rare Earth Machining
Since Rare Earth Magnet material is prone to chipping and cracking, it does not lend itself to conventional machining methods. It can, however, be abrasively ground, but only with the use of liberal amounts of coolant. The coolant minimizes heat fracturing and the risk of fires caused by oxidized grinding dust.
Note : Technical data and specification subject to change. Special Rare Earth Magnets can be made on request of customers, they have to just send us their technical data and application, required for our engineers.
