Sintered Neodymium Magnets are supplied by HSMAG

Sintered Neodymium Magnets

HangSeng Magnetech uses only licensed neodymium and licensed magnet materials for all applications.

Sintered neodymium-iron-boron (Nd-Fe-B) magnets are licensed rare earth magnets which are the most powerful commercialized permanent magnets available today, with maximum energy product ranging from 26 MGOe to 52 MGOe. Neodymium Iron Boron is the third generation of permanent magnet developed in the 1980s. It has a combination of very high remanence and coercivity and comes with a wide range of grades, sizes and shapes. With its excellent magnetic characteristics Nd-Fe-B offers  flexibility for new designs or as a replacement for traditional magnet materials such as ceramic, Alnico and Sm-Co for achieving higher efficiency and more compact devices.

A powder metallurgy process is used in producing sintered Neodymium magnets. Although sintered Neodymium is mechanically stronger than Samarium Cobalt magnets and less brittle than other magnets, it should not be used as a structural component. Selection of Nd-Fe-B is limited by temperature due to its irreversible loss and moderately high reversible temperature coefficient of Br and Hci. The maximum application temperature is 200 °C for high coercivity grades. Nd-Fe-B magnets are more prone to oxidation than any other magnet alloys. If Nd-Fe-B magnet is to be exposed to humidity, chemically aggressive media such as acids, alkaline solutions salts and harmful gases, coating is recommended. It is not recommended in a hydrogen atmosphere.

Applications of Neodymium Magnets Magnetic separators Linear actuators Microphone assemblies Servo motors DC motors (automotive starters) Computer rigid disc drives, printers and speakers

Attributes of Neodymium Material Very high resistance to demagnetization High energy for size Good in ambient temperature Moderately priced Material is corrosive and should be coated for long term maximum energy output Low working temperature for heat applications, but higher levels of heat resistance materials are being introduced periodically

Rubber Coated Magnets by HSMAG

Rubber Coated Magnets, Rubber Covered Neodymium Magnets, Powerful Rubber Coating NdFeB Magnets, Holding Magnet, Pot Magnets

Rubber coated magnet is strong neodymium magnet protected by a layer of durable black rubber coating. As the magnet is completely covered by rubber coating, the magnets are water-proof as well as incredibly resistant to damage., also the magnet is very durable and will not easily break like a normal magnet. Rubber coated neodymium magnets give great durability and high friction to keep them from slipping on surfaces.  The rubber coating also acts as a protection against chipping and liquids.

We can apply rubber coating to disc, block, ring or even countersunk magnet, this is one of the most versatile magnets, perfect for aquariums, marine environments, construction sites, outdoor applications and so much more.

The strong Neodymium magnet applied with high quality rubber coating, could ensure a safe contact surface when you apply it onto the cars or other metal surfaces easy to be hurt and need to be protected in a contact etc. Also, they are suitable for other holding applications when in need to protect contacted steel surfaces.

We welcome your own design to make a custom rubber coated magnet for your application.  If you require a specific size that is not available on our website, please contact us for a custom magnet quote.

Pot Magnets by HSMAG

We offer an extensive range of Pot Magnets, also called as Cup Magnets (magnetic lenses) , from small Pot Magnets lifting 400g up to large Pot Magnets lifting up to 130kg. 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.

Pot magnets, Cup magnets, Mounting magnets, Magnetic holder, Magnetic hook, Round base magnet, Rubber coated magnetic systems – super-strong adhesive force

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
Rubber Coated Magnetic Pots
Round Base Magnet

Pot Magnet / Magnetic lenses are characterized by a specific magnetic circuit arrangement, providing thus maximum magnetic force utilization. Their application range includes metalworking plants and/or mechanical engineering plants, in combination with various preparations, tools and devices. 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).