Neodymium Countersunk Pot Magnet with Black Epoxy Coating – 32mm x 8mm | Rust Resistant

The Neodymium Countersunk Pot Magnet with Black Epoxy Coating – 32mm Diameter x 8mm is a powerful rare earth mounting magnet designed for secure, low-profile fixing to compatible ferromagnetic steel surfaces. Measuring 32mm in diameter x 8mm high, this round pot magnet features a countersunk centre hole for mechanical fastening with a compatible countersunk screw.

Manufactured using high-performance Neodymium Iron Boron (NdFeB) magnetic material and housed within a protective steel pot, the magnet is designed to concentrate magnetic flux towards the active working face. A black epoxy coating provides additional protection against corrosion and oxidation while creating a discreet black finish suitable for visible mounting applications.

The combination of neodymium magnetic performance, steel pot construction, countersunk mounting and a rust-resistant black epoxy coating makes this magnet suitable for signage, displays, cabinetry, fixtures, machinery, furniture, equipment and custom magnetic mounting systems.

Key Features

• Neodymium countersunk pot magnet
• 32mm diameter
• 8mm overall height
• Protective black epoxy coating
• Improved resistance to rust and corrosion
• High-performance Neodymium Iron Boron (NdFeB)
• Rare earth permanent magnetic system
• Protective steel pot housing
• Steel housing helps concentrate magnetic flux towards the working face
• Countersunk centre mounting hole
• Designed for use with a compatible countersunk screw
• Low-profile mechanical mounting
• No electrical power required

Common Applications

• Signage and displays
• Cabinet and door catches
• Furniture manufacturing
• Removable panels
• Machinery and equipment
• Retail displays
• Exhibition systems
• Fixtures and fittings
• Product assemblies
• Workshop applications
• OEM manufacturing
• Custom magnetic mounting systems

Black Epoxy Coating for Improved Corrosion Resistance

The black epoxy coating provides an additional protective barrier around the magnetic assembly, helping improve resistance to moisture, oxidation and corrosion compared with an unprotected neodymium surface.

This coating can be particularly useful where the magnet may encounter environmental conditions that could otherwise contribute to corrosion.

The black finish also provides a more discreet appearance when the magnet is incorporated into dark-coloured equipment, displays, fixtures or products.

While the epoxy coating improves corrosion resistance, rust resistant does not mean completely rust-proof. Damage, chips or wear to the protective coating can expose the underlying material and reduce corrosion protection.

For prolonged exposure to water, salt, chemicals or harsh outdoor environments, suitability should be assessed for the specific application.

Countersunk Hole for Mechanical Mounting

The integrated countersunk centre hole allows the pot magnet to be mechanically secured using a compatible countersunk-head screw.

This provides a practical installation method for mounting the magnet to materials such as:

• Timber
• Plastic
• Composite panels
• Suitable metals
• Equipment housings
• Custom fabricated components

When correctly installed, the countersunk screw can sit neatly within the magnet's profile, helping maintain a compact mounting arrangement.

The exact countersunk hole and compatible screw dimensions have not been supplied, so the required fastener size should be confirmed before installation.

Avoid overtightening the screw, as excessive mechanical force can damage the magnet or pot assembly.

Neodymium Rare Earth Magnetic Performance

This pot magnet incorporates Neodymium Iron Boron (NdFeB), a high-performance rare earth permanent magnetic material known for providing strong magnetic attraction relative to its size.

Because the magnetic field is permanent, no batteries, wiring or external electrical power are required.

For maximum practical holding performance, the active magnetic face should make close, flat contact with clean and sufficiently thick ferromagnetic steel.

How Does a Neodymium Pot Magnet Work?

A pot magnet combines a permanent neodymium magnet with a steel housing or cup.

The steel pot helps redirect and concentrate the magnetic field towards the exposed working face while providing additional mechanical protection around the brittle neodymium material.

This construction makes pot magnets particularly useful for magnetic holding and mounting applications where attraction is primarily required from one working face.

Compact 32mm x 8mm Profile

Measuring 32mm in diameter x 8mm high, this pot magnet combines a useful magnetic contact area with a relatively low-profile design.

The compact dimensions make it suitable for incorporating into products and equipment where available mounting space may be limited.

Potential installations include:

• Recessed fixtures
• Magnetic catches
• Removable access panels
• Signs and displays
• Furniture components
• Machinery accessories
• Custom magnetic assemblies

Technical Specifications

• Product Type: Neodymium Countersunk Pot Magnet
• Alternative Names: Black Epoxy Pot Magnet, Countersunk Rare Earth Magnet, Countersunk Cup Magnet, Screw-Mount Neodymium Magnet
• Magnetic Material: Neodymium Iron Boron (NdFeB)
• Magnet Type: Rare Earth Permanent Pot Magnet
• Shape: Round
• Diameter: 32mm
• Height: 8mm
• Mounting: Countersunk Centre Hole
• Housing: Steel Pot / Cup
• Coating: Black Epoxy
• Corrosion Protection: Rust Resistant
• Power Requirement: None
• Target Surface: Compatible ferromagnetic iron and steel
• Primary Function: Magnetic mounting, holding and positioning

Magnetic Holding Performance

Actual magnetic holding performance depends on the complete mounting arrangement rather than magnet dimensions alone.

Important factors include:

• Steel thickness and composition
• Surface flatness
• Available contact area
• Air gaps
• Paint and surface coatings
• Rust or contamination
• Direction of applied force
• Vibration and movement

The strongest holding condition is generally achieved when the magnetic working face makes direct, flat contact with suitable steel.

No specific pull-force or Gauss rating has been supplied for this magnet, so maximum holding capacity should not be inferred from its 32mm diameter or neodymium construction.

Direct Pull vs Shear Loads

Magnetic holding is generally strongest in direct pull, where force is applied perpendicular to and directly away from the steel surface.

When the magnet is mounted vertically and the attached component applies a downward force, the magnet is subjected to a shear or sliding load. Practical holding performance in this orientation can be significantly lower than direct-pull performance.

Applications involving vibration, movement or dynamic forces should be assessed carefully, and secondary mechanical retention may be appropriate where accidental detachment could create a hazard.

Please Note

The black epoxy coating improves corrosion and rust resistance, but the magnet should not be considered completely waterproof or rust-proof. Avoid damaging the coating during installation and use.

A specific magnetic grade, pull force, Gauss rating and countersunk screw size have not been provided and should not be assumed.

Neodymium magnets are powerful but inherently hard and brittle. Do not drill, cut or machine the magnetic material, and avoid impacts or excessive tightening that could chip, crack or fracture the magnet.

Do not use this magnet for lifting people, hazardous overhead suspension or safety-critical load holding unless the complete system has been appropriately engineered, tested and rated.

Keep strong magnets away from children, pacemakers, medical implants, magnetic storage media and sensitive electronic equipment.