SmCo Magnets

Samarium Cobalt MAGNETS

Permanent Samarium Cobalt magnets (SmCo) are composed of samarium, cobalt and iron.
These rare earth magnets are extremely strong for their small size, metallic
in appearance and found in simple shapes such as rings, blocks and discs.

Attributes of Samarium Cobalt

  • 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 Cobalt

Computer disc drives, sensors, traveling wave tubes, linear actuators,
satellite systems, motors where temporary stability is vital.

Magnetizing and Handling

Samarium Cobalt magnets are very brittle and very strong magnetically. 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 chip if allowed to “jump at” an
attracting object. It is highly recommended that when constructing rare
earth magnetic assemblies, they be magnetized after assembly.

Samarium Cobalt Machining

Since Samarium Cobalt 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.

Micro SmCo Magnets

Micro magnets

We specialise also in thin-walled and slot-opening miniature ring magnet through laser incising, drilling and processing SmCo material. Serial products of SmCo ring magnets, precious stone bearings, etc. are widely applied in fields of miniature motor, optical communication, instrument and meter, watch, electro acoustic, etc. The products are exported to the countries and areas of Switzerland, Germany, Hong Kong, etc. and win favor at home and broad.

Typical micro magnets

  • ring magnets
Standard Sizes and Tolerances
Item
External Diameter. mm
Internal Diameter. mm
Height. mm
Magnetization
Basic Size

Min:0.8

Max:10.0

Min:0.2

Max:3.0

Min:0.2

Max:15

According to your requirements
Limits of Deviation
±0.005—±0.05
±0.01—±0.1
±0.005—±0.05
±1°
  • Micro Ball

The precise micro ball, with the diameter 0.8mm to 5.0mm, which is produced with super-hard material, can meet the demands of some special industries, with the limits of deviation in size reaching + 0.001and surface roughness 13.

  • Micro Column (Disc)
Standard Sizes and Tolerances
Item
External Diameter. mm
Height. mm
Pointedness R&C
Size Range

Min:0.2

Max:2.0

Min:0.2

Max:15

According to your requirements
Limits of Deviation
±0.005—±0.02
±0.005—±0.02
R±0.01
  • Micro Block

The micro precise block, in processing of production of gemstones in watch, are usually applied in the industries of communication, medical apparatus, precise machine, etc.

Standard Sizes and Tolerances
Item
Length. mm
Width. mm
Height. mm
Verticality
Size Range

Min:0.5

Max:3.0

Min:0.5

Max:3.0

Min:0.5

Max:3.0

According to your requirements
Limits of Deviation
±0.005—±0.02
±0.005—±0.02
±0.005—±0.02
±0.5°