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A pot magnet is a permanent magnet encased in a steel shell, which is sometimes called a pot, hence the name 'pot' magnet.
A permanent magnet emits a magnetic field without the need for any electricity
The
steel shell helps the pot magnet by increasing its holding power and
providing the magnet with added strength and stability.
What are the parts of a pot magnet?
Magnet
A pot magnet's magnetic face is only exposed on one side of the steel pot.
The north pole of a pot magnet is in the centre of the magnet, with the south pole around the outside edge.
The
configuration of the magnetic poles creates a closed circuit when the
magnet is attached to a ferromagnetic material, providing a stronger
hold. A closed circuit is where the magnetic field is trapped within the
ferromagnetic material when it becomes attached to the magnet.
This
type of magnetisation does lead to the magnetic field being strong, but
not far reaching, as the lines only run parallel to the magnet.
Therefore, the pot magnet can only attract ferromagnetic materials when
they are very close to the magnetic face.
Steel shell on a pot magnet
The steel shell is a casing for the magnet and protects it from any chipping or cracking from contact with a hard surface.
The
steel pot provides strength for the magnet, which would otherwise be
very brittle, and allows threaded holes and studs to be inserted.
The
steel shell helps the magnetic field become up to thirty two times
stronger than other magnets by concentrating it to only one magnetic
face. This means it can hold large objects such as supermarket signs
from a ceiling without any additional support.
Some varieties of
pot magnet can also be encased in a brass or plastic shell. The brass
and plastic provide the magnet with a non-ferromagnetic shell which
increases the magnetic field when a pot magnet is not supplied with a
spacer. This only occurs in American pot magnets, as brass or plastic
shells are not currently available in this country.
Pot magnet spacer
A
spacer acts as a barrier in-between the magnet and the steel shell to
avoid any demagnetising effects the steel may have on the magnet.
A spacer in a pot magnet can either be made of brass or plastic.
Rubber cap and rubber coating on a pot magnet
Pot
magnets can have a rubber coating on top of their steel shell which
allows them to be used on surfaces where the user does not want the
magnet to scratch, such as on a car roof.
If the pot magnet
does not have a rubber coating, there is the option to buy a rubber cap
which is easy to press onto the magnet and to remove.
The rubber
provides the pot magnet with friction which allows the magnet to be
clamped on vertical surfaces so they will not easily slide off. However,
the rubber cap or rubber coating on a pot magnet creates an air gap
meaning the holding capabilities of the magnet can be reduced.
All kinds of pot magnets:
There are five forms of pot magnet: bi-pole, countersunk, through hole, internal threaded, and stud.
Pot magnets are often used as magnetic bases and magnetic holders for large supermarket ceiling signs.
GME
Neodymium Pot Magnets compliment our Alnico Pot Magnets by delivering
large holding powers in small packages. These magnets are designed to be
"Low Profile," but still incorporate a tapped hole in the back wall for
mounting.
The Neodymium
Pot Magnets not only have a potent attraction while in direct contact
with a work piece, but they also have excellent field projection
capabilities.
NEODYMIUM
with higher operating Temperatures and Intrinsic Coercive Forces are
available in these Pot Magnets. Samarium Cobalt and Stainless shells and
shields are also manufactured. The all Stainless Pot Magnets, for both
Alnico and Neodymium, are a Level I or II food grade unit.
All
GME Pot Magnets are Centerless Ground after pressing to +0.001 /
-0.000. The standard tolerance on the length is +/-0.015. Tighter
tolerances are available upon request.
Options
Various Tap Styles and Tap Depths.
Insulated (Brass Sleeved).
Shoulders and Machined Features on shell.
Protruding Pot Magnets.
Metric and Custom Sizes
What are pot magnets used to?
Magnetic light fittings
Internal
threaded stud pot magnets can be used as part of a light fitting for a
magnetic down light. The magnet is attached to the end of the light to
hold it onto the metal in a ceiling.
Exhibition display signs
Countersunk
pot magnets can be used to attach an exhibition display sign to a stand
for marketing purposes, e.g. at a trade show.
Magnetic Holders
Internal threaded pot magnets with the added hook accessory can be used to hang items such as mugs to a fridge door.
For more information, please refer to www.greatmagtech.com or sales@greatmagtech.com
A pot magnet is a permanent magnet encased in a steel shell, which is sometimes called a pot, hence the name 'pot' magnet.
A permanent magnet emits a magnetic field without the need for any electr
No Matter you buy 1 pcs or 100,000 pcs of magnets, you can not find better service elsewhere.
2-Pole Mild Steel Pot Magnet
1" Diameter
1-1/2" Height
8.75 Pounds Average Magnetic Pull
17.5 P
GME, where you can find awesome quality, but also great service!
1m self adhesive flexible magnetic strip
Specification of 1m self adhesive flexible magnetic strip:
GME, where you can find awesome quality, but also great service!
1m strong rubber magnetic stripe
Specification:
Size
2" size, super strength, high quality, permanent magnetic hook
Our magnetic hook racks are made from neodymium magnets, the world's strongest magnets.
These strong neodymium magnets have a pro
Standard sizes ship within 2 weeks. custom-made size and grade are always available.
Description:
Shape: Hole Disc Magnets
Magnetic Face: 20mm diameter
Thickness: 10mm
The best quality and customer satisfaction are our first priority.
Neodymium magnets are the world's strongest magnet,
compared with Samarium cobalt, ferrite magnet, and alnico magnet.
GME
The best quality and customer satisfaction are our first priority.
Neodymium magnets are the world's strongest magnet,
compared with Samarium cobalt, ferrite magnet, and alnico magnet.
GME
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