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Magnet shapes & materials

Classify neodymium magnets by shape, grade and condition

Record blocks, rings, discs, segments, assemblies and broken magnets separately, stating their origin, weight and condition.

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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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  • Material-specific assessment
  • Clear follow-up questions
  • Agreed shipping arrangements

Neodymium magnet shapes

Ring magnets

Ring magnets and magnets with a bore are assessed by their outer and inner diameters, height, coating and documented material family.

Ring magnets shown as shape examples
Illustrative image: the visible shape does not establish the alloy, purity or magnet grade.

Four key details

Information needed for assessment

  1. 01Outer and inner diameter
  2. 02Height and magnetisation direction
  3. 03Coating and condition
  4. 04Lot weight excluding packaging
Material identification requires evidence

Magnetic force, colour, coating or geometry alone are insufficient. Documentation, origin and, where appropriate, suitable analysis determine the material classification.

Other specialist areas

Relevant ES Metall specialist pages

For more detailed information about selling, recycling, rare-earth materials and prices we pay, visit the relevant ES Metall specialist pages.