Miniature Magnets  Manufacturers, Traders, Suppliers

The electromagnets listed below are examples of solutions implemented in series.
Magnetbau Schramme develops customised solutions. If you are looking for a suitable electromagnet for your series project, simply contact us.
Our team is guaranteed to help you.

CJ Magnet can provide you with Neodymium, Ferrite, Samarium Cobalt, Alnico rare earth permanent magnets and magnet assemblies.We can also provide you with customized services.

From stock and on request: Miniature permanent magnets made of neodymium and samarium-cobalt
with galvanic coating: nickel, zinc, tin, gold, silver, chrome

• Cuboid from height 0,3mm
• Discs from diameter 0,5mm
• Cylinder from diameter 0,3mm
• Rings from diameter 2,5mm

Miniature magnets are critical components of devices and equipment such as micro-electromechanical systems (MEMS). A micro-electromechanical system (MEMS) is a term for the technology found in very small or microscopic devices such as actuators, motors, sensors, and gyroscopes. 

Neo magnets are ten times stronger than the strongest ceramic magnet. They’re also the most powerful commercially produced industrial magnet on the market. In fact, a single small Neo magnet, weighing only a few grams can hold up to a thousand times its own weight. Neo magnets are so powerful that you must use caution when handling them. Their force may cause them to attract to metal or each other, painful if your fingers are caught in their path. Composed of mainly neodymium, iron and boron, most of neo magnets are grade N35 to N52 and nickel plated.

Neodymium Magnets Features & Characteristics
Grades & Materials - Neodymium magnet materials in both standard and premium grades for reduced production and lead times. We offer sintered neodymium magnets in grades ranging from N30 to N55.
Sizes & Shapes - Sizes for standard Neodymium Iron Boron rare-earth magnets range from a few millimeters to approximately 150 mm, while assemblies can weigh up to several tons. Standard shapes include discs, blocks, rings, and arc segments in various sizes and grades. Non-standard shapes and sizes can be custom fabricated exact specifications from raw stock.
Temperature Considerations - Neodymium magnets are temperature sensitive. For applications in which the magnet may be exposed to temperatures in excess of about 250°F (120°C), careful consideration must be given to the choice of magnet grade and the magnetic circuit.
Manufacturing Methods - Due to the relatively brittle nature and high-magnetic strength of NdFeB magnets, cutting and grinding should be done prior to magnetization. We are fully equipped to machine these materials to virtually any shape and size for your project’s specialty requirements using our in-house grinding and EDM facilities. Finishing to tolerances of +/-0.05mm can be achieved, as required.
Surface Treatments - Neo magnets are susceptible to oxidation, so painting, epoxy coating, or plating is highly recommended to prevent corrosion. The common surface treatments include nickel plating, zinc, or epoxy coatings.
Handling & Storage - Neodymium materials are relatively brittle, but are magnetically very strong. They must therefore be handled carefully to avoid injury to personnel and damage to the magnets.

Neodymium magnets have replaced alnico and ferrite magnets in many of the myriad applications in modern technology where strong permanent magnets are required, because their greater strength allows the use of smaller, lighter magnets for a given application. Some examples are:

• Head actuators for computer hard disks
• Mechanical e-cigarette firing switches
• Locks for doors
• Loudspeakers and headphones
• Mobile phone speakers, taptic feedback and auto focus actuators
• Magnetic bearings and couplings
• Benchtop NMR spectrometers
• Electric motors
• Electric generators for wind turbines (only those with permanent magnet excitation)
• Voice coil
• Retail media case decouplers
• In process industries, powerful neodymium magnets are used to catch foreign bodies and protect product and processes
• Identifying precious metals in various objects (cutlery, coins, jewelry etc.)