Star Trace (P) Ltd.

We engineer and supply high precision and reliable range of samarium rare earth magnets at our highly equipped manufacturing unit.

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)

Application 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, whichever 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 no more 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 very strong magnetically. It is crucial to handle these magnets with extreme care to avoid personal injury and damage. 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 can be magnetized after assembly.

Rare Earth Machining
Since rare earth magnet materials are 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.

FOR FURTHER DETAILS KINDLY MAIL TO: startrace@dataone.in