Alnico Disc Magnets

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Grade 8 Alnico Disc Magnets

Alnico disc magnets are part of the permanent magnet family and relatively high in magnetic strength. Grade 8 alnico discs offer excellent temperature stability and can be used at temperatures up to 1000ºF (500ºC). Because of their temperature stability and relatively high magnetic strength, alnico disc magnets are ideal for many industrial applications, such as rotating machinery, meters, instruments, sensing devices holding applications and more.

Sintered & Cast Alnico Disc Magnets

We carry a large inventory of grade 8, sintered or cast alnico disc & cylinder magnets, from smaller size disc magnets measuring 0.25” in diameter to larger cylinder magnets up to 0.75” in diameter. Not all of our disc magnets are shown on this website. Contact us today or send us a special request and let us know what you are looking for.

* $15.00 total minimum order (excluding shipping & tax if applicable) - Items can be combined to reach the minimum amount.

Alnico Disc Magnet Features & Characteristics

Cast Alnico Disc Magnet Technical Data Sintered Alnico Disc Magnet Technical Data
Grade: 8 Grade: 8
Type: Sintered Type: Cast
Magnetization: Through the Thickness (THK) Magnetization: Through the Thickness (THK)
Br: 7,000 Gauss Br: 8,300 Gauss
BHmax: 5 MGOe BHmax: 5.5 MGOe
Hc: 1.900 Oersteds Hc: 1,650 Oersteds
Max Operating Temperature: 1004ºF/540ºC Max Operating Temperature: 1004ºF/540ºC
Curie Temp: 1580ºF/860ºC Curie Temp: 1580ºF/860ºC
Density (lb/in3): 0.253 Density (lb/in3): 0.265

Standard Dimensional Tolerances for Alnico Disc Magnets

Generally the tolerance on Alnico Disc Magnets is +/-0.005" on diameter and thickness.

Alnico Disc Magnet Manufacturing Methods

Alnico disc magnets are manufactured through either a casting or sintering process. They can be made into complex shapes such as horseshoes, which is not possible to do with other magnet materials.

Applications for Alnico Disc Magnets

Guitar Pick Ups Wind Turbine Equipment Pipeline Inspection Equipment Industrial Automation Equipment Military Radar Equipment

Alnico disc magnets are relatively high in magnetic strength and offer excellent temperature stability (they can be used in temperatures up to 1000°F/500°C). They are ideal for industrial, technical and consumer applications, where temperature stability is critical. Common applications for alnico disc magnets include:

  • Guitar Pick-Ups
  • Electrical Motors
  • Bearings
  • Traveling Wave Tubes
  • Aerospace Components
  • Rotating Machinery
  • Sensors & Sensing Devices
  • Meters & Instruments
  • Harsh Environment Equipment
  • High Temperature Handling Equipment
  • Heat Treatment Jigs
  • Medical Devices
  • Industrial Machinery
  • Microphones
  • Robotics
  • Communications
  • Industrial Automation Equipment
  • Actuators
  • Military Radar Equipment
  • Magnetors
  • Security Systems & More

Custom Alnico Disc Magnets

We carry a large inventory of alnico disc magnets, alnico rod magnets, and alnico bar magnets in assorted sizes and shapes. In addition, we can custom manufacture alnico disc magnets to your exact specifications. Contact us today or send us a special request, and our experienced team of engineers will work with you to determine the best solution for your specialty project. Our sister company, Integrated Magnetics, has over 60 years of expertise in manufacturing complex magnetic assemblies for more technical applications.