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Alnico Ring Electric Motor Magnets , Arc Ring Magnet for DC Motors

Alnico Ring Electric Motor Magnets:
Material:Cast alnico magnet
Grade: alnico5
Magnetism direction: Radial-orientated Magnetization
Tolerance: +/-0.01mm
Delivery Time:15-30 working days for prototype or batch accordingly
Application: DC Stepper Motors ,AC Motors , Servo Motors
  • DunBen

Alnico magnets are made primarily from aluminum, nickel, cobalt, copper, iron and sometimes titanium. Among all the available magnetic materials, they have high magnetic flux density, resistance to corrosion and excellent temperature stability, the maximum working temperature up to 600℃. Alnico magnet is widely used in all kinds of sensors and meters, electronics, instruments, medical instruments, teaching, automobile, aviation, martial and other applications.
There are two different manufacturing process for Alnico: Cast and Sintered Alnico. Cast Alnico can be made into intricate and complex shapes, which is not possible with other magnetic materials. Sintered Alnico is manufactured using a powder metallurgy process. while slightly weaker than cast alnico, It exhibits superior mechanical characteristics .
Alnico Magnetic Characteristics.pdf

Competitive Advantage:


1. High Temperature resistance

2. Comparatively high magnetic properties

3. Dimensional Stability 

Alnico Ring Electric Motor Magnets , Arc Ring Magnet for DC Motors 


1. Comparatively high magnetic properties

2. Radial-orientated Magnetization

3. Cast surface or shiny surface





DC Stepper Motors ,AC Motors , Servo Motors

alnico motor magnet draw


Physical Properties of Cast Alnico
Curie Temperature () 760-890
Max. Operating Temperature () 450-550
Resistivity (μohm.cm) 47-54
Hardness (Hv) 520-630
Density (g/cm⊃3;) 6.90-7.30
Relative Recoil Permeability (μrec) 1.70-4.70
Saturation Field Strength (kOe,kA/m) 2.7-6.3/215-500
Temperature Coefficient of Br (%/) -0.025 ~ -0.02
Temperature Coefficient of iHc (%/) +0.01 ~ +0.03


Cast Alnico Process Chart 
Raw material -> forming- >smelting-> heat treatment-> surface treatment->precision grinding->inspection ->packing
Sintered Alnico Process Chart
Raw material ->powder-> forming-> sintered- >heat treatment-> surface treatment->precision grinding –>inspection- >packing
重传alnico process flow






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  86-571-82750965 
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