Neodymium Countersunk Magnets as Disc or Block Magnet

Countersunk Magnets - Neodymium Cup Magnets with Mounting Hole

These Neodymium Shallow Pot Magnets feature a countersunk hole to accommodate screw fixings. They are ideal for applications where magnets are used closing mechanisms, where the screw head must be concealed, such as cabinet doors, drawers, gate latches and door holdings. They are also ideal for other applications such as shop fitting where magnets are used for attaching shelving, signage, lighting systems and window displays. Neodymium is the perfect material for these applications as it gives a high magnetic strength to size ratio, hence a small magnet can be used in applications where space is limited. The countersunk hole in the magnet can accommodate anything from M3 to M5 screw head size depending on the magnet size.

Countersunk magnets are available with either pole on the magnetic face so that they can be used as a pair to attract or repel. If you are using two magnets to attract you need to make sure the opposite poles are facing each other as identical poles will repel!

Features

• These magnets have only one surface of magnetic attraction. This type of construction prevents further spread of magnetic field. Due to this, other items or machine parts in the vicinity of the pot magnets do not become magnetized.
• These magnets have ability to retain their magnetic force indefinitely.
• The magnetic force of these magnets are only affected by the increased temperature and external magnetic force.

How does a pot magnet differ to a regular magnet?

Magnetism is confined to one face only, where it is concentrated to give the maximum holding force possible for the size of the magnet. They are more resistant to chipping and cracking as they are protected by their steel shell.

Applications

These magnets are versatile magnets which are designed for various industrial applications. The popular industries in which these magnets are used are as follows:

• The metal and steel industry
• Tool shops
• Used to position ferrous-magnetic work pieces

Precautions

• The permanent pot magnets must not be exposed to radioactive radiations for longer duration as it might effect their magnetic strength.
• This can work within permissible temperature. If these magnets are used beyond permissible temperature limit it might again affect their magnetic strength.

Pot magnets can be fabricated into many shapes and types:

Depending on the temperature durability these magnets are of following types:

• ceramic magnets
• alnico magnets
• Samarium Cobalt Pot Magnets
• Other Pot Magnets

Buy Pot Magnets online at Magnosphere

We offer an extensive range of Pot Magnets, from small Pot Magnets lifting 400g up to large Pot Magnets lifting up to 160kg. They exist in a wide range of diameters and heights. We actually offer far more sizes and pull forces across the range than shown on this site – if you cannot see a Pot Magnet of the right size or performance, please contact us for our complete brochure range.

We offer seven types of Pot Magnet plus a Surface Protecting Slide Resist Clamp Magnet

• Pot Magnet with External Threaded Stud / Boss Mounting
• Pot Magnet with Internal Threaded Mounting (Deep Pot)
• Pot Magnet with Countersunk Mounting (Shallow Pot)
• Pot Magnet with Through Hole Mounting
• Pot Magnet with Internal Threaded Stud / Boss Mounting
• Pot Magnet with Threaded Through Hole Mounting
• Limpet Pot Magnet
• Surface Protecting Slide Resist Clamp Magnet

We offer Pot Magnets in a silver (chrome, zinc or nickel) finish, a white paint finish, a red paint finish, black rubber coated finish and ferritic stainless steel finish.

Our Pot Magnets can be used in a variety of applications. For example they can be used in extremely cold applications (in theory towards absolute zero) and in extremely hot conditions (up to +300 degrees C, perhaps up to +350 deg C).

All the Pot Magnet types can be used for ambient temperature indoor applications where moisture content is low or negligible. NdFeB Pot Magnets are best for maximum pull strength with a small size. Ferrite Pot Magnets can be used for corrosion resistance, marine, low cost and higher temperature applications. Alnico Pot Magnets can be used in higher temperature applications and where the pull force needs to change as little as possible with temperature variation. Alnico Pot Magnets can also be used in corrosion resistance applications. SmCo Pot Magnets can be used for extreme temperature applications and marine / corrosion resistance applications.

We offer rubber coated magnets to provide extra friction to minimise slipping across the clamped surface (the total pull force is reduced as an ‘effective air gap’ in introduced between the magnet and the clamping surface). It allows Pot Magnets to clamp more securely to a vertical surface with reduced slip (this compensates for a need to have a much stronger magnet – the force required to create a slip, or shear, on a clamped Pot Magnet is estimated as around 20% the maximum pull although the friction levels impact on this approximation). For note, the pull force values are based upon the Pot Magnet working at maximum magnetic specification clamping onto a much bigger high magnetic permeability mild steel base and the force stated is that required to guarantee removing the Pot Magnet on every occasion. Clamping onto thin sheet could result in a reduced clamping force as the thin ferromagnetic sheet magnetically saturates. Clamping through an ‘effective air gap’ also significantly reduces the pull force. And the temperature characteristics of the magnets also impact on pull force (above ambient temperatures result in reduced pull forces – the amount of reduction depends on the magnet material in the Pot Magnet).

Who supplies high quality Pot Magnets?

Magnosphere produces magnets at great prices, produced and delivered on time for all areas of industry, automotive, aerospace, electronics as well as in the design sector, trade fair construction, offices and for the home.

We are an ISO certified shop and carry the Trusted Shops seal. We have successfully completed more than 200,000 orders and offer our ever-growing customer base 24/7 customer service.

All items are available for immediate delivery in large numbers with daily dispatch. Our selection is your win! Thousands of satisfied customers! Buy from a company with the highest quality standards and customer service with flexible and diverse payment options and conditions.

We can also custom manufacture these to fit your exact specifications using our in-house global manufacturing facilities and team of experienced engineers. Need high quantities of magnets at the lowest and fairest price possible? Just let us know what you are looking for and contact our Customer Care Team by sending us a request for quote! We'll work with you to determine the most economical way of providing you with what you need.

Trust in our experience and convince yourself of our service and our products and we look forward to welcoming you to our magnet shop at Magnosphere. You are welcome to contact us by eMail: info(at)magnosphere.co.uk. Available 24/7 x 365 and we are also there for you on public holidays! Or just give us a call.