China permanent magnet manufacturer: www.rizinia.com

What is the maximum size of the magnet? How small is the minimum?

Answer

It depends on the material. The common ferrite magnets and NdFeB magnets are described as follows:
Ferrite magnet

  • Round: maximum 156mm (diameter), minimum d2.5mm (diameter)
  • Square: maximum 152 x 101 x 25.4mm (L x W x H), minimum L2 x W2 x 0.8mm (L x W x H)
  • Ring: maximum 300 x 170 x 25mm (OD x ID x height), minimum 5.55 x 2.4 x 4.2mm (OD x ID x height)

Neodymium iron boron magnet

  • Round: maximum 200 mm (diameter), minimum 1 mm (diameter)
  • Square: Max 200 x 150 x 25mm (L x W x H), min 1 x 1 x 1mm (L x W x H)
  • Ring: Max 250 x 20 x 30mm (OD x ID x height), min 3 x 1 x 1mm (OD x ID x height)
  • The maximum or minimum volume can be made according to the actual situation. Ex: is there embryo stock for the maximum volume? The minimum volume should be limited by MOQ, etc

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