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What are the different types of pot magnet?

Types of pot magnet: bi-pole, countersunk, internal threaded, stud and through hole

There are five types of pot magnet: countersunk, internal threaded, through hole, bi-pole and stud. The pot magnets vary in their attachments, which allow them to be connected to different types of objects, such as supermarket signs and articulated gauging arms.

Countersunk pot magnet

Countersunk pot magnets

Countersunk pot magnets are a type of a pot magnet with a countersunk hole in the magnetic face. The countersunk hole has a flat top on one magnetic face which tapers at a 82 degree angle towards the top of the shell, in the shape of a cone. 

4mm countersunk hole in a countersunk pot magnet with a countersunk wood screw

The countersunk hole aids the magnet in its attachment to non-ferromagnetic materials with a countersunk screw.


For more information see the page: What is a countersunk pot magnet?

Ceiling shallow pot magnet

Internal threaded pot magnets

Internal threaded pot magnets are a type of pot magnet with a threaded hole through the centre. An internal threaded hole is a cylindrical hole with continuous grooves, known as threads, in a spiral pattern around its inside wall.

Deep pot magnet holding an articulated arm gauge

Internal threaded pot magnets can be used as magnetic bases for gauges, for example, an articulated gauging arm.


For more information see the page: What is an internal threaded pot magnet?

Through hole pot magnet

Through hole pot magnets

Through hole pot magnets have a hole through the centre, known as a boss. The boss allows the magnet to be attached to non-ferromagnetic items with a bolt. 

For more information, see the page: Neodymium Mounting Magnets with Straight Hole

Lifting a bike out of a river with a through hole pot magnet

Through hole pot magnets can be used as retrieval magnets, which are used to pick up or retrieve ferromagnetic objects from hard-to-reach places. For example, you could use a retrieval magnet to pull a bicycle from a river.


For more information, see the page: Through Hole Neodymium pot magnet

Parts of a bi-pole pot magnet: shell, steel poles and magnet

Bi-pole pot magnets

Bi-pole pot magnets have a thin magnet in the centre with two mild steel poles on either side, inside a shell. This is known as a sandwich magnet system. 


A sandwich magnet system makes the bi-pole pot magnet thirty-two times stronger than a standard magnet, for example, a bar magnet.


Internal threaded female stud pot magnet

Stud pot magnets

Stud pot magnets can either be a shallow or deep, and have a stud protruding from the top of the pot magnet's case. The stud is the cylinder of stainless steel that protrudes from the surface of the magnet.


Stud pot magnets can be used to hold promotional signs from the ceilings of supermarkets.


For more information, see the page: Stud Pot Magnet