Both sintered Neodymium magnets and sintered Samarium Cobalt magnets are produced by powder metallurgy technology and all belonging to hard and brittle material which well-known for their machining difficulty, especially sintered Samarium Cobalt magnets. As the first generation and the second generation rare earth permanent magnets, 1:5 type Samarium Cobalt magnets are relatively easier to machine compared with 2:17 type Samarium Cobalt magnets. Even sintered SmCo magnets are still notorious for its machining difficulty, it still playing an irreplaceable role in many areas due to its excellent high temperature magnetic performance and stability, therefore, the development SmCo micro magnets become extremely essential and urgent. SmCo micro magnets also can be used in the shape of SmCo micro ring magnets and SmCo micro disc magnets. SmCo micro magnet is commonly used to watches, sensors, medical devices, tele-communication devices, micro-electromechanical system (MEMS), and many other applications. The most representative among these applications is watch movement rotor magnets and optical isolator magnets. Watch movement rotor magnets could be described as the origin of SmCo micro magnet. Wristwatch accessories manufacturers have fully absorbed processing experience from crystal industry and became the earliest manufacturers of SmCo micro magnet.
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