10 Magnetic Separator Myths

By buntingeurope | 10 April 2017

Magnetic Separator Fact and Fiction

Trying to ascertain what and whose Magnetic Separator will provide the best metal separation can be difficult.  Often, the decision is made even more difficult with claims and counterclaims about levels of Gauss and what the Magnetic Separator can actually capture.  In this blog, we try to dispel those Magnetic Separator myths.

Myth 1 – You Should Always Use the Strongest Magnetic Separator

Strongest is always best, or is it?  Commonly, companies will call and request a quote for a Magnetic Separator with the strongest magnet.  But is that actually what they need?


Myth 2 – All Rare Earth Magnetic Separators Are The Same

A client has a metal contamination problem and needs to install the most suitable magnetic separation.  The metal is small and so they believe that a Magnetic Separator with Rare Earth Neodymium Magnets is what they need as this produces the strongest magnetic field.  So he picks up the phone and orders a Rare Earth Magnetic Separator and his problem is solved.  Or is it?

Myth 3 – The Highest Gauss Magnetic Separator Is Always The Best, Or Is It?

On a regular basis, we will receive an enquiry requesting a Magnetic Separator of a specific size.  However, it is only when the enquiry also requests a specific Gauss figure that it all starts becoming a little complicated.

Myth 4 – Stainless Steel Isn’t Magnetic, Or Is It?

The vast majority of stainless steel used in plants processing foodstuffs, chemicals, plastics and handling bulk materials whether in solid, liquid or powder form, is non-magnetic.  Or is it?bunting-ffs-magnet-with-stainless-steel-washer-and-wingnut-0086


Myth 5 – Do Magnets Lose Strength Over Time?

It is a question we frequently get asked:  When will the Magnetic Separator start losing its magnetic strength?  In normal operating conditions, a magnetic separator will not lose any magnetic strength.  However, there are occasions when other factors do affect the magnetic strength.

Myth 6 – Is A Magnetic Field Uniform Along the Surface of a Tube Magnet?

On a typical Cartridge or Tube Magnet, the magnetic field on the surface is not even along the whole length.  As shown on the photograph, magnetically attracted materials agglomerate at specific points along the length.  So why is that?

Myth 7 – We Guarantee 100% Metal Separation

In the perfect world, installing a Magnetic Separator will enable 100% metal separation with 0% product loss.  However, is this even remotely possible?

Myth 8 – You Can Block a Magnetic Field

A common question asked by users of Magnets and Magnetic Separators is whether a Magnetic Field can be blocked in the same way that lead blocks radiation.  This can be an important issue when considering the location of a Magnetic Separator and whether it is near instrumentation, control panels, or is in an area freely accessible by employees.


Myth 9 – Magnetic Separators Are Not Dangerous?!??

In school science, we learn about magnetism by playing with small permanent magnets.  It is fun, seeing how iron filings are affected by the magnetic field.  Our bodies are also constantly exposed to the Earth’s Magnetic Field.

So how can Magnets be dangerous?

Myth 10 – It Is Easy To Clean a Magnetic Separator

The Magnetic Separator has done its job and captured that potentially damaging item of ferrous metal.  Now it is time to remove the captured metal from the surface of the Magnetic Separator.  It should be easy, shouldn’t it?  However, due to the high magnetic power cleaning metal off a Magnetic Separator is becoming increasing difficult and a health and safety concern.

For further details on Magnetic Separator Myths or to discuss any Metal Contamination and Separation issue, please contact our technical sales team on:



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