Pot Magnets Manufacturer & Wholesale Pot Magnets for Sale

Neodymium mounting magnets, often called pot or cup magnets, are one of the most efficient ways to turn high strength neodymium magnets into practical holding and clamping tools. Pot magnets, also known as cup or mounting magnets, focus the magnetic field on one working face, making them powerful mounting magnets for industrial, commercial and DIY projects.

A pot magnet is a magnet that is contained within a casing or housing, usually a magnet encapsulated in a steel shell. It is a type of permanent magnet that is encased in a steel shell, or pot, forming a permanent magnet housed in a steel cup or channel. In other words, pot magnets consist of a magnet contained within a housing or casing, with magnets encased in steel cups to greatly increase the usable pull force.

At Osenc, we design high quality pot/cup magnet assemblies that use powerful rare earth neodymium pot magnets as the core. Our engineering team embeds powerful NdFeB magnets into a durable steel cup or channel to deliver high-strength pot magnets that are stable, safe and easy to mount. As a leading supplier of the world’s strongest neodymium magnets and a global supplier of neo pot magnets, we supply pot magnets worldwide, from heavy industrial users to pot magnets in Sheffield and magnetic materials optimized for the Canadian market.

Wholesale supply of Pot neodymium magnets

We offer wholesale supply of pot magnets in a wide range of sizes, pull forces and mounting styles to meet different industrial applications.

Pot magnets are assemblies that typically use sintered neodymium (NdFeB), ferrite or AlNiCo magnets encased in a low-carbon steel cup. The steel “pot” redirects and concentrates the magnetic flux into the working face, significantly increasing the practical holding force compared with a bare magnet of the same size.

Because there is no unified international standard for pot magnet naming, different regions may use terms like “cup magnets”, “mounting magnets”, “countersunk pot magnets” or “threaded pot magnets” for similar products.

Definition of Pot neodymium magnets

Many customers are familiar with magnet grades (N35, N52, etc.) but less familiar with the concept of a pot magnet. You can think of a pot magnet as:

“Permanent magnet + steel shell + mounting structure”
combined into one ready-to-use holding device.

Permanent magnet core: Usually neodymium, ferrite or AlNiCo.
Steel pot (cup): Guides the magnetic field and protects the magnet.
Mounting feature: Such as internal/external thread, countersunk hole, hook or eye bolt.

The magnet grade (for example N35–N52) still defines the maximum energy product ((BH)max) and remanence (Br), but in a pot magnet, the overall holding performance also depends strongly on the design of the steel shell and contact surface.

Get the reliable pot neodymium magnets you need to complete your project with our help.

Dedicated to custom pot magnet production.

Characteristics of Pot Magnet

Feature

Pot magnets are a versatile and powerful solution for engineers and buyers who need compact but strong holding power. Pot magnets are versatile and suitable for both commercial and private use, from factory fixtures to home organization.

Structurally, a pot magnet is encased within a steel shell. Flat pot magnets are manufactured with ferrite (ceramic) or rare-earth (NdFeB or SmCo) magnets. We also supply Strong neodymium pot magnets for applications that demand maximum performance, as well as all cylindrical Alnico 5 permanent magnets assembled concentrically in a mild steel pot and tapped, high-depth Alnico Pot Magnets for high-temperature use.

For fast installation, our pot magnets focus on Simple assembly and durable, corrosion-resistant magnets with recessed holes for easy installation. The result is an easy-to-use method of securing various hangers to metal surfaces, cable trays, signs and tools — all with magnets instead of drilling holes.

Advantages ------

1. Extremely high practical holding force

Because the steel shell concentrates the magnetic flux on one face, pot magnets can deliver much higher clamping force than a bare magnet of the same size. This makes them ideal where you need strong holding power but have limited installation space.

2. Directional and safe magnetic field

Pot magnets mainly emit magnetic field from their working face, while the sides and back are shielded by the steel cup. This reduces unwanted attraction to nearby steel parts and makes handling, installation and storage safer and easier.

3. Compact and robust structure

The steel shell not only improves magnetic efficiency but also protects the magnet from impact and mechanical damage. The assembly has high hardness and good mechanical strength, suitable for repeated mounting and dismounting.

4. Easy installation and design flexibility

Pot magnets are available with many mounting options – countersunk hole, through hole, internal/external thread, hook, eye nut, etc. This allows engineers to integrate them easily into fixtures, jigs, signs, tools and equipment without complex housing design.

Disadvantages ------

1. Performance depends on contact conditions

The rated pull force of a pot magnet is measured on a thick, clean, flat low-carbon steel plate. In real applications, paint, rust, gaps, thin steel or uneven surfaces can significantly reduce the actual holding force.

2. Mainly suitable for direct contact holding

Pot magnets are designed for direct contact with ferromagnetic surfaces. If there is an air gap, non-magnetic spacer or large distance between magnet and workpiece, the performance drops faster than with some other magnet systems.

3. Limited working temperature by magnet material

Although the steel shell provides some thermal mass, the maximum operating temperature is still limited by the internal magnet material (for example N-series NdFeB vs H/SH/UH series, ferrite, etc.). If your application works at higher temperatures, you must choose appropriate magnet material and coating.

Types of Pot Magnets We Manufacture

Neodymium pot magnets are powerful mounting magnets and deliver the highest pull force in a compact size. Many of our neodymium pot magnets come in paired N/S sets for fixturing and alignment.
For higher-temperature environments we offer tapped, high-depth Alnico Pot Magnets and designs with all cylindrical Alnico 5 permanent magnets assembled concentrically in a mild steel pot, combining stability and magnetic performance.
Our portfolio also includes External Thread Pot Magnets that are high in magnetic strength, low-profile cups, and flat grip magnets with threaded bushing for easy integration into jigs and fixtures.
Customers can choose from our selection of pot magnets, including cup magnets and pot magnets, threaded studs, countersunk versions and a miniature pot magnets selection for electronics and compact mechanisms.
Designers can explore our range of neodymium magnetic cups and pot magnets to match different pull forces, materials and coatings for specific projects.

Pot Magnet Specifications & Pull Force

In industry, our standard neodymium pot magnets are widely Used for lifting, holding and locating ferrous parts on machines, workbenches and production lines. Typical products include Mounting Magnets – Each Holds 35lbs – Neodymium Magnet POT for light fixtures and tools, and heavy-duty cups with Average Pull Force: 43.2 lbs and higher.

We can supply Pot Magnets in desired thread sizes of 1/4″-20, #8-32, #10-32, 5/16″-18, 1/2″-13 & M6 x 1.00, as well as custom sizes on request.

Model	Diameter (mm)	Height (mm)	Thread Type	Notes
OS-PM-20-35	20	7	1/4″-20	Mounting Magnets – Each Holds 35lbs – Neodymium Magnet POT
OS-PM-25-43	25	8	M6	Designed with Average Pull Force: 43.2 lbs on clean low-carbon steel
OS-PM-32-EXT	32	8	External thread	External Thread Pot Magnets are high in magnetic strength
OS-PM-40-CSK	40	8	Countersunk hole	durable, corrosion-resistant magnets with recessed holes for easy installation

These assemblies use high strength neodymium magnets and are engineered as High quality pot/cup magnet assemblies for industrial use.

Typical Applications of Pot Magnets

Pot Magnet Buying Guide.

Pot magnets belong to the “top tier” of practical holding solutions because they convert the magnet’s energy into very efficient, usable pull force. However, before purchasing, you should evaluate the following factors:

1. Operating Environment & Temperature

Confirm the ambient temperature, humidity and whether the magnet will contact water, oil or chemicals. Choose suitable internal magnet materials (NdFeB / ferrite / AlNiCo) and coatings (nickel, zinc, epoxy, rubber, etc.) to ensure long-term performance and corrosion resistance.

2. Required Pull Force and Safety Factor

Define the minimum holding force you actually need and then add a safety factor, typically 2–3 times the working load. Remember: all catalog pull forces are measured under ideal conditions; real conditions usually give lower values.

3. Magnet Size and Shape

The diameter and height of the pot magnet directly affect its holding force and installation space. Select the size that matches your structure, and pay attention to whether you need low-profile, extra-strong or extended-height designs.

4. Mounting Style

Choose between countersunk hole, through hole, threaded stud, internal thread, hook, eye bolt, etc., according to your installation method. Good design of the mounting structure improves both safety and convenience in actual use.

5. Cost and Lifecycle

Pot magnets using high-grade neodymium cores provide stronger holding force but are more expensive than ferrite versions. In many projects, a slightly larger ferrite pot magnet can provide sufficient force at lower cost; in compact or high-force applications, neodymium pot magnets are usually more economical over the entire lifecycle.

Where to get Pot Magnets?

If you search in local retail stores, you may only find a few simple pot magnets with limited sizes and pull forces. The reasons are clear:

Most retail users only need a small selection of standard sizes.
High-performance neodymium pot magnets require specialized manufacturing and quality control.
Industrial users often need custom sizes, coatings and mounting styles that normal retail channels cannot provide.

For professional applications, the best way is to purchase pot magnets directly from a reliable source manufacturer. Buying from the source helps you to:

Get accurate and complete technical specifications
Customize size, pull force, coating and mounting style
Reduce cost through batch production and optimized design

When choosing a pot magnet manufacturer, pay attention to several key points:

Reputation and Experience

Choose a supplier with many years of experience in magnetic assemblies and pot magnet production. Proven application cases and long-term industrial customers mean more stable quality and performance.

Customization Capability

Pot magnets are often designed around specific fixtures, equipment and working conditions. The ability to customize dimensions, materials, coatings and accessories is crucial for achieving the best holding performance.

Engineering Support

Professional engineering support can help you select the right pot magnet model, calculate pull force under real conditions, and optimize your overall design to avoid over- or under-specifying magnets.

Delivery Time and Stability

Stable lead times and reliable production capacity ensure that your projects are not delayed. A good supplier can coordinate sample development, pilot runs and mass production according to your schedule.

We understand that finding a trustworthy pot magnet supplier is not always easy. That’s why we focus on long-term cooperation, offering reliable pot magnet assemblies and responsive technical support.

Whether you need standard cups or custom designs, Osenc supplies pot magnets in desired thread sizes of 1/4″-20, #8-32, #10-32, 5/16″-18, 1/2″-13 & M6 x 1.00 and many more. As a Global Supplier of Neo Pot Magnets, we support OEM projects with high-strength pot magnets, competitive pricing and fast delivery.

FAQ

What Is a Pot Magnet

In simple terms, a pot magnet is a magnet encapsulated in a steel shell, or a magnet that is contained within a casing or housing. It is a type of permanent magnet that is encased in a steel shell, or pot, forming a permanent magnet housed in a steel cup or channel. Thanks to this design, magnets encased in steel cups provide much higher usable pull force than a bare magnet of the same size.