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What are Pot Magnets?
Pot magnets are a type of permanent magnet that is encased in a steel shell. Pot magnets do not lose holding power over time unless exposed to extreme temperatures or external magnetic force.
Pot magnet manufacturers typically supply magnets round pot magnets for holdings, clamping, or mounting.
The most common components of permanent pot magnets are: Sintered Ferrite, Alnico, Rare Earth SmCo and NdFeB.
How do Pot Magnets work?
A pot magnet attaches itself to magnetic components through a magnetic field OR to non-magnetic materials with fittings such as threaded holes and pots on top of a steel shell.
This steel shell works to increase magnet holding power, strength, and stability.
What are the advantages of Pot Magnets?
Using ferrite, alnico, and rare earth magnets in pot magnets improves magnet performance significantly:
Increased magnetic strength: With pot magnets, the magnetic field is concentrated on a single area. This offers greater holding power.
Durable: With steel or rubber casings, brittle magnets like rare earth magnets are protected.
Budgetfriendly: Because of the enhanced magnetic force with steel casings, pot magnets can use less magnetic material to achieve the same properties.
Mounting functionality: With fittings and accessories, pot magnets have a wide selection of applications for daily applications.
How are Pot Magnets Made?
Step 1: Shaping and casting
Magnet mold is sanded to achieve magnet shape. Generally, ferrite and rare earth are used for flat pot magnets, while alnico and rare earth are used for cylindrical pot magnets.
The magnetic material is then cast and heated in an electromagnetic stove to over 1600 degrees Celsius to melt the metal.
Step 2: Molding
The solution is then poured into the sand mold. The casting mill is opened to cool the material and prevent the sand mold from burning.
The metal is then separated from the sand block.
Step 3: Magnetization
Pot magnets will then be saturated to achieve a magnetic field and establish its direction. Generally, solenoids or a special magnetizing machine is used to impart a magnetic force.
Step 4: Embedding
The magnetized metals are then embedded into steel housing to concentrate magnetic force and increase holding power.
What are the Applications of Pot Magnets?
Pot magnets are embedded into a wide selection of machines, instruments, and tools across various industries.
Here are the most common uses of pot magnets in daily life:
Industrial Applications: Pot magnets are powerful tools for industrial applications. The most common uses include clamping, lighting, holding, and transport.
Mounting and Hanging: Pot magnets with threaded stems have exceptional strength for various mounting applications in the home, office, and industrial setting. They can be used for mounting signs and banners for marketing and exhibitions, antennas, dashcams, door and gate clamps, and light fixtures.
Searcher and Sweeper Operations: Pot magnets are widely used for searching lost items and salvaging goods, such as deep-sea searches or in hard-to-reach areas (sewers, chutes, pipes).