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Top 10 · Applications & weights

Where particularly large quantities of neodymium magnets are used

Original applications, documented mass data and traceable sources for wind power, MRI systems, drives, robotics and mobility.

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Loose rectangular neodymium magnetsClearly identified magnet shapesRecord block, ring, disc and segment magnets separately.Disc-shaped neodymium magnetsQuantity & conditionDocument the net weight, coating and contaminants.Removed HDD magnet assemblyTechnical applicationsThe original application and nameplate help with the initial assessment.Electric motors as a source of NdFeB magnetsIndustrial applicationsIdentify and describe motors, generators and production lots.

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Rank 10 · NdFeB application

Industrial motor or servo motor

D-Ggeneric literature valueGeneric literature figure

As segment, arc or embedded magnets in the rotor of a permanent-magnet servo motor. Encoders and brakes may contain additional small magnets.

Set of industrial electric motors, illustrating an application
Reference value0.175 kgNdFeB per motor as a literature factor
Calculation or source basis

CEPS application factor; no published magnet mass for specific ABB, FANUC or Siemens motors.

Limitations of the figure

Power rating, rotor design, magnet grade and temperature requirements can substantially change the actual quantity.

Original application & recovery

Where magnets are located in servo and industrial motors

Its position within the device helps with identification, but does not in itself establish the alloy, weight or eligibility for purchase.

Location within the equipment

As segment, arc or embedded magnets in the rotor of a permanent-magnet servo motor. Encoders and brakes may contain additional small magnets.

System boundary

NdFeB per motor as a literature factor. Foreign parts, housings, shafts, back irons, supports and other device components are not automatically included in the magnet mass.

Record before submitting an enquiry

  • Substantiate the motor and rotor type with documentation
  • State attached materials, the shaft and the housing separately
  • A manufacturer's name alone does not substantiate the quantity

Source reference

Source of the figure

D-Ggeneric literature value

CEPS / INSPIRES · application factors

CEPS application factor; no published magnet mass for specific ABB, FANUC or Siemens motors.

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