Complete Guide: What Is A Pot Magnet?


A pot magnet is a magnet whose magnetic force is enclosed by a metal casing. This makes them stronger, more durable and safer than traditional magnets.

In this article, professionals from Faizeal will take you to learn about pot magnets.

  1. What are Pot Magnets?

  2. How Pot Magnets Work?

  3. Ideal for General Clamping Applications

  4. Pot Magnet Structure

  5. Pot Magnet Fixtures and Accessories

  6. Extra Protection

  7. Pot Magnet Clamping Force

  8. Pot Magnet Material

  9.Temperature Resistance

10.Advantages of Using Pot Magnets

11.Common Applications of Pot Magnets

12.Comparing Pot Magnets with Other Types

13.FAQs About Pot Magnets



What are Pot Magnets?

A pot magnet is a permanent magnet, usually made of a circular magnet plate embedded in a steel housing. Pot magnets are commonly used to hold objects such as tools, parts, and tool boxes. They are also used in mechanical devices such as electric motors and transformers.

The magnetic force of a pot magnet usually consists of two or more magnet plates, which attract each other. Magnet plates are made of steel or other magnetic material and are embedded in a steel housing. The housing is usually made of mild steel so that the magnets can move freely.

The magnetic force of the pot magnet can be very strong, and it can be used to attract heavy objects. They are also very durable and can withstand heavy stress and impact. The pot magnet is a versatile tool that can be used in a variety of applications.


How Pot Magnets Work?

The working principle of the pot magnet is to use the magnetic force. Magnetism is a natural force that attracts or repels objects. The magnetic force of the pot magnet is generated by the magnet plate. Magnet plates are made of a magnetic material that creates a magnetic field. Magnetic field refers to the propagation of magnetic force in the surrounding space. When a magnetic field interacts with another magnetic field, it creates an attractive or repulsive force.

The magnetic force of the pot magnet can be very strong, and it can be used to attract heavy objects. For example, an object weighing up to 100 lbs can be held by a pot magnet weighing up to 10 lbs. Pot magnets are also extremely durable and can withstand heavy stress and shock. The pot magnet is a versatile tool that can be used in a variety of applications. For example, pot magnets can be used for:

• Snap tool

• Snap parts

• Snap Toolbox

• Fixed object

• For machinery

A pot magnet is a powerful and durable tool that can be used in a variety of applications.


Ideal for General Clamping Applications

A typical pot magnet usually consists of a magnet contained within a housing or casing. Ferromagnetic housings are typically made from electroplated mild steel, but ferritic stainless steel (400 series), popular for its corrosion resistance, is also used. Check out our range of pot magnets.

pot magnets typically clamp with a highly concentrated magnetic force when in direct contact with an iron-based surface. Clamping/pulling forces in direct contact are typically higher than with traditional standard magnets. This is because the magnetic circuit is optimized for clamping applications (by eliminating air gaps in the magnetic circuit).


Pot Magnet Structure

A typical pot magnet has only one surface to apply a magnetic field, creating a concentrated clamping force. The magnetic side emerges from the case. You may find that typical pot magnets come with a retaining plate that covers the surface of the magnet during shipping or handling.

When designing the pot magnet, we designed it to provide the maximum pulling force relative to the size of the magnet - to do this we designed the air gap in the component's magnetic circuit. The ferromagnetic housing directs the magnetic field directly to the surface to be clamped for high efficiency.

So if the north side of the magnet is visible, the ring of mild steel around the outside of the magnet acts like a south pole - effectively providing two magnetic poles on the clamping surface so that the distance between the poles is shorter for the magnetic force to pass through. over the clamped surface.


Pot Magnet Fixtures and Accessories

Due to changes in the ferromagnetic cup housing design, the pot magnet allows for a variety of ways to secure it to the customer's component.

pot magnets can include threaded rods (external threads), threaded holes in the housing material (internal threaded holes/bosses/threaded bushings/internal threads), screw countersinks, bolt counterbores, or even for simple gluing in place The blind end – some versions even have a precision grind on the outside diameter for an interference fit.

pot magnets have an advantage over traditional magnets, with traditional magnets you can't put the threads on the magnet itself because they are too brittle and therefore cannot withstand the force required for the threads.


Extra Protection

The pot magnet also protects the magnet inside it, which really helps in high clamping force pot magnet applications. The steel casing ensures the pot magnet is more durable and protected from impact damage or load-bearing damage. Cup or case shield magnet - Ideally, the pot magnet is made in such a way that it is slightly inset relative to the surface of the cup ring, so any mechanical impact should be on the steel rather than the magnet, limiting the risk of breakage.

When using a pot magnet, the pot magnet can be pressed into place (not possible with the magnet alone) - the cup protects the magnet and withstands the pressure; a specially produced pot magnet is required (which we provide). Protective casings improve corrosion resistance by reducing exposure to corrosive conditions.


Pot Magnet Clamping Force

pot magnets are always rated by clamping force (which is the maximum possible pulling force a pot magnet can achieve). They are designed specifically for clamping and are therefore rated in kg pull or N pull (1kg pull is approximately 9.81N pull). Although they contain magnets, it is not recommended to rate them by magnetic field strength - you will be measuring large changes across the clamping surface (from the north pole in the center to the south pole around it).

pot magnet pull is tested on high quality thick mild steel test parts. If the material being clamped is thin, the maximum pull force you will achieve may be less than the rated pull force - as the material becomes thinner, the measured pull force decreases even further. If this happens and you need more pulling force, you will need to increase the thickness of the material you are clamping, use more pot magnets to multiply the force, or you can use smaller pot magnets with shallower magnetic fields.

If the material being clamped is of poor ferromagnetic quality (rusty, low permeability, bent, coated/painted, thin, meshed, etc.), the magnet's ability to interact with the material to produce high pulling forces is limited .

pot magnets resist sliding better than many other magnets. As a general guideline, a standard magnet requires one-fifth (20%) of its direct pull force to start sliding on a surface (shear force), while a pot magnet typically requires one-third (33%) of its direct pull force Begins to slide on the surface (shear force). And rubber/polyurethane coated pot magnets have higher friction and therefore higher shear forces (often being able to increase shear forces beyond direct pull forces). Rubber coated pot magnets not only provide excellent slip resistance but also help protect painted/coated surfaces from scratches.


Pot Magnet Material

Ferrite, alnico, neodymium iron boron and samarium cobalt materials are all commonly used in pot magnets. Each type has its own properties and characteristics. In terms of size, the NdFeB version will be the most powerful, while the ferrite version will be cheaper but the least powerful (size for size). The performance of the samarium cobalt version is not far behind that of NdFeB, but has better temperature characteristics. The Alnico version will have a range of properties depending on its design, but is better suited for higher temperature applications. Learn more about magnet materials


Temperature Resistance

A typical pot magnet can provide pull forces from less than 1 kg to as much as 130 kg (possibly higher). Most pot magnets operate at temperatures up to +80 degrees Celsius (rubber-coated versions up to 60 degrees Celsius). At higher temperatures, either the magnet material becomes a limitation (standard NdFeB material is limited to +80 degrees Celsius, but higher temperature grades are available), or the production method may be a limitation (e.g. adhesive temperature limitations or expansion coefficients causing problems ). Therefore, some alnico pot magnets may be rated at 220 degrees Celsius (although alnico may go up to 450-550 degrees Celsius) because the materials in which pot magnets are designed expand at different rates, causing the assembly to operate at temperatures above There is a risk of loosening at this temperature.

To solve this problem, we produce special pot magnets that can operate at temperatures up to 450-550 degrees Celsius (e.g. for high temperature applications such as welding). We offer magnetic solutions for a variety of applications and can take environmental conditions into account.


Advantages of Using Pot Magnets

A pot magnet is a magnet enclosed in a metal casing. The enclosure offers several advantages over traditional magnets, including:

• Increased Strength: The housing concentrates the magnetic field for stronger magnetism.

• Durability: The case protects the magnets from damage such as scratches and chips.

• Threaded Mounting: The housing can be threaded, which makes it easy to attach the magnet to a surface.

• Waterproof: The casing is usually made of stainless steel, which is waterproof and rustproof.

• Cost-Effective: Pot magnets are manufactured with less material than traditional magnets, which can save costs.

• Safety: Pot magnets are safer than traditional magnets because their magnetic force is enclosed by a metal casing. This means they won't come off or injure you as easily as traditional magnets.

• EASY TO USE: Pot magnets are very easy to use, just screw them into the appropriate surface. They do not require any special tools or installers.

• Versatility: Pot magnets can be used in a variety of applications, including:

◦ lift and move objects

◦ Separation of magnetic and non-magnetic materials

◦ fixed object

◦ Fixtures and Equipment

◦ cleaning metal surfaces

◦ Manufacturing and Assembly


Common Applications of Pot Magnets

• Lifting and moving objects: Pot magnets can be used to lift and move heavy objects such as steel beams and machinery. The concentrated magnetic force of the pot magnet makes it possible to grab and lift these objects even if they are not perfectly aligned.

• Separation of magnetic and non-magnetic materials: Pot magnets can be used to separate magnetic and non-magnetic materials, such as iron filings and sand. The magnetic field of a pot magnet will attract iron filings, while non-magnetic sand will not be affected.

• Fixing Objects: Pot magnets can be used to fix objects such as tools and equipment. The strong magnetic force of the pot magnet prevents objects from moving, even with vibrations or bumps.

• Secure Tools and Equipment: Pot magnets can be used to secure tools and equipment to surfaces. This is useful in workshops and factories where tools and equipment are often moved.

• Clean metal surfaces: Pot magnets can be used to clean metal surfaces by attracting and removing metal shavings and dust. This helps keep surfaces clean and free of debris.

• Manufacturing and Assembly: Pot magnets are used in a variety of manufacturing and assembly applications. For example, they can be used to hold parts in place during assembly, or to align parts during welding or soldering.


Comparing Pot Magnets with Other Types

Feature Pot Magnet Traditional Magnet
Magnetic Strength Strong Weak
Durability High Low
Safety High Low
Ease of Use High Low
Cost High Low
Weight Heavy Light
Application Range Wide Limited


FAQs About Pot Magnets

What types of pot magnets are there?

There are various types of pot magnets, each with its own unique advantages and disadvantages. Some common types of pot magnets include:

* Permanent Magnetic Pot Magnets: Permanent Magnetic Pot Magnets use permanent magnets, which means they don't require electricity to generate magnetic force. Permanent magnets are usually more powerful than other types of pot magnets, but they are also more expensive.

* Induction cooker magnets: Induction cooker magnets use electricity to create magnetism. Induction cookware is usually less expensive than permanent magnets, but they are also weaker.

* Ceramic Disc Pot Magnets: Ceramic Disc Pot Magnets are made of ceramic and magnets. Ceramic dish magnets are generally more durable than other types of pot magnets, but they are also more expensive.


How to use the pot magnet?

How to use pot magnets depends on its type and purpose. However, most pot magnets will work by screwing them into a suitable surface. Once pot magnets are in place, they can be used to lift and move objects, separate magnetic and non-magnetic materials, hold objects, secure tools and equipment, and clean metal surfaces.


What are the safety precautions for pot magnets?

Pot magnets are very powerful, so be careful when using them. Here are some pot magnet safety considerations:

* Do not hold pot magnets close to magnetic objects such as magnetic tapes, hard drives or credit cards. Pot magnets may damage these objects.

* Keep the pot magnets away from children. Pot magnets may cause harm to children.

* Do not drop or break the pot magnet. The pot magnet may break and its magnets may fall off.

* Do not expose pot magnets to extreme temperatures. The pot magnet may be damaged.


How do I choose the right pot magnet?

When choosing pot magnets, the following factors need to be considered:

* The purpose of the pot magnet you will be using.

* The weight of the object you need to lift or move.

* The type of magnetic and non-magnetic material you need to separate.

* The size and weight of the object you need to fix.

* The type of tools and equipment you need to secure.

* The type of metal surface you need to clean.

* The amount you are willing to spend.


How do I buy pot magnets?

Pot magnets can be purchased at a variety of retailers, including hardware stores, online stores, and magnet specialty stores. When purchasing pot magnets, it is important to purchase from a reputable supplier. You can choose Faizeal, Faizeal can provide a variety of permanent magnet couplings, magnetic motor rotors, laminated magnet assemblies, Halbach arrays and other magnetic components.



Pot magnets are a versatile tool that can be used in a variety of applications. They are stronger, more durable, safer and easier to use than traditional magnets. If you're looking for a magnet to help you get things done, pot magnets are a great choice.

If you want to get high-quality service and suitable price, please contact us for the latest information!

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