Block Neodymium Magnets are usually square or rectangular neodymium magnets. Usually, we call them magnetic blocks, Neodymium bar magnets, or rectangular Neodymium magnets. Square block neodymium magnets are a type of neodymium magnet characterized by their square shape with equal dimensions on all sides. These magnets possess exceptional magnetic strength and are widely utilized in various industrial and consumer applications. Their uniform shape and powerful magnetic field make them ideal for tasks requiring strong magnetic attraction in a compact form factor. Square block neodymium magnets are commonly found in magnetic clasps, closures, fasteners, and magnetic therapy devices. Their versatility and high performance make them indispensable in industries ranging from manufacturing and engineering to healthcare and consumer electronics.
We offer block neodymium magnets in different shapes from stock. Surface treatment options include uncoated and coated, if you don't find the neodymium magnet you need, please contact us.
Rectangular block neodymium magnets, on the other hand, feature a rectangular shape with different dimensions for length, width, and thickness. These magnets offer similar magnetic strength to their square counterparts but provide flexibility in their dimensions, allowing for customization to suit specific applications. Rectangular block neodymium magnets are often employed in magnetic separation systems, magnetic resonance imaging (MRI) machines, magnetic therapy products, and various industrial assemblies where a strong and tailored magnetic field is required. Their rectangular shape enables efficient utilization of space and facilitates integration into complex designs. With their robust magnetic properties and adaptable geometry, rectangular block neodymium magnets serve as indispensable components across a broad spectrum of industries and applications.
Neodymium block magnets are always used in industrial markets and small blocks may be used as craft magnets. Neodymium magnets known as NdFeB, Neodymium-Iron-Boron, Neo, NIB, or Rare Earth Neodymium magnets, are the third generation of rare-earth permanent magnets. They offer the highest energy product of any material today and are available in a very wide range of shapes, sizes, and grades. These qualities have made NdFeB magnets preferable over the commonly used larger and less powerful Ferrite magnets.
Although the Curie temperature for NdFeB materials is 310-370ºC, some irreversible loss of output may be expected at even moderate temperatures. NdFeB magnets also have a moderately high reversible temperature coefficient of Br which reduces total magnetic output as temperature rises. The selection of NdFeB instead of SmCo, for example, is a function of the maximum temperature of the application, required magnetic output at typical use temperature, and total cost of the system.
However, they are sensitive to oxidization and can develop corrosion, so they require surface protection like phosphate, passivation, Ni, NiCuNi, Zn, Epoxy, NiCuNi+Sn, or others.
---Genuine Neodymium magnet, without La (Lanthanum) or Ce (Cerium) to destroy magnet quality
---Outstanding magnetic properties – Br high to 14.5 kGs (1. 45T) and (BH)max high to 52 MGOe (414 kJ/m3)
---High demagnetization resistance –maximum Hcj higher than 35 kOe (2785 kA/m)
---High working temperature – maximum working temperature high to 230ºC
---Wide range of grades with new ones regularly being developed – High magnetic properties, AH grades or Low Weight Loss materials and so on.
Normal Size Range: L (Length): 1~180mm, W (Width): 0.4~100mm, T (Thickness): 0.4~120mm
Maximum Size: Rectangular: L180 x W80 xT60mm, Square: L100 x W100 xT70mm
Minimum Size: L1 x W1 x T0.4mm
Orientation Direction Size: Lower than 80mm
Tolerance: Generally +/-0.1mm, Particularly +/-0.03mm
Small Blocks Neodymium Magnets: Typically used in crafts, small electronic devices, and sensors.
Medium Blocks Neodymium Magnets: Common in more substantial electronic applications, motors, and machinery.
Large Blocks Neodymium Magnets: Used in industrial applications, magnetic separation, and larger machinery.
Generally, the finished block of a small dimension is sliced from the big block directly. If the dimension of one or two directions is large, for example,>60mm, it should need grinding and EDM cutting, due to the limits of the slicing machine. If all three directions are too large, only grinding is enough. Prior to coating, the small block needs vibration tumbling and the big block needs manual chamfering.
It is mainly used in Electric motors, wind turbines, pump couplings, chemical pumps, sensors, magnetic sputtering cathodes, magnetic assemblies, etc.
If you want to buy the right Neodymium block magnets, please send us the following information if possible:
1. Any drawing or shape, dimension, and tolerance of magnets that you want to order
2. Neodymium magnet grade or detailed magnetic properties
3. Supplied magnetized or not, the direction of magnetization
4. Other possible requirements like coating or working temperature
5. The quantity, delivery way (air or sea shipment)
6. Any seaport or airport close to your company
Rare Earth Neodymium Block Magnets are not very hard, so we will have a strict testing procedure before the product is delivered. To ensure NdFeB magnets meet requirements, we main test the following items: size, weight loss, magnetic properties, flux, flux density, angle deviation, magnetic loss, appearance, coating thickness, corrosion resistance, etc. Horizon provides customers with high-quality magnets, Welcome to choose us! In addition to block magnets, we also offer ring neodymium magnets and cylinder neodymium magnets.
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