NEODYMIUM BLOCK MAGNETS
High Performance Bar Magnets
Neodymium block magnets are compact rectangular magnets that provide a stable and robust magnetic field. Their geometry is particularly well-suited for applications requiring precise magnetic interaction in small motors, magnetic assemblies, and sensors. The design facilitates their integration into various systems, ensuring consistent and efficient performance in multiple industries.
Block Magnets in Standard Sizes & Custom Options
The dimensions of block magnets directly affect their magnetic strength and the efficacy of their applications. An increased size would enhance the magnetic field strength, making it appropriate for heavy-duty industrial applications. However, it may provide challenges regarding spatial constraints and system design. The converse would be a dimension that would be optimal for specific space-restricted devices but might provide inadequate magnetic force for a designated function.
Sizing is critical to ensuring the magnet fits correctly in the system, resulting in maximum magnetic field strength and functional precision.
- The long side ranges typically from 5.00 mm to 111.00 mm (0.20″ to 4.37″).
- The short side ranges from 1.00 mm to 89.00 mm (0.04″ to 3.50″).
- The height ranges from 1.00 mm to 30.00 mm (0.04″ to 1.18″).
- Adhesive force ranges from 0.1400 KG to 200.00 KG.
During customization, we ensure that each magnet’s dimensions are exact and give rigorous tolerance limits. The specific tolerances are:
Diameter tolerances range from
- 1.00 mm to 25.00 mm (0.04″ to 1.00″), tolerance is ±0.10 mm (±0.004″)
- 25.00 mm to 50.00 mm (1.00″ to 2.00″), tolerance is ±0.20 mm (±0.008″)
- 50.00 mm to 75.00 mm (2.00″ to 3.00″), tolerance is ±0.30 mm (±0.012″)
- 75.00 mm to 100.00 mm (3.00″ to 4.00″), tolerance is ±0.40 mm (±0.016″)
- 100.00 mm to 111.00 mm (4.00″ to 4.37″), tolerance is ±0.50 mm (±0.020″)
- Thickness tolerance: ±0.10 mm applies to all sizes.
These tolerances and dimensions may be adjusted based on a specific application’s operating environment and design requirements.
Magnetization Pattern and Direction
Neodymium block magnets can be magnetized in several ways, depending on the project requirements. Length magnetization orients the magnetic field through the length of the block, yielding a strong and focused pull that is especially well-suited to applications that involve gripping and lifting.
With width magnetization, the magnetic field is oriented along the block’s width, creating a large surface magnetic force. The large, even magnetic field produced by this orientation of magnetization makes it suited to applications like sensors and assembly.
Finally, thickness magnetization aligns the magnetic field through the thickness of the block, increasing the power of the surface magnetic force. This is particularly useful for magnetic fixtures and assemblies that require precise, localized magnetic forces for secure and accurate positioning.
Width Magnetized
Length Magnetized
Thickness Magnetized
Block Magnet Features & Characteristics
- What is a block magnet? Block magnets are rectangular or square permanent magnets, usually made of materials such as neodymium iron boron. They have a strong magnetic force and are widely used in many fields, such as industry, electronics, automation, etc.
- How strong is a block magnet? The magnetic force of a block magnet depends on its size, material and magnetization direction. Neodymium iron boron magnets provide the most potent magnetic force and are suitable for applications that require high magnetic fields.
- How do you choose a block magnet? When choosing a block magnet, consider factors such as magnetic force requirements, magnetization direction, size, working environment, and temperature resistance.
- What are the applications of block magnets? Block magnets are widely used in sensors, electronic products (such as speakers), motors, magnetic fixtures, toys, medical equipment and many other fields.
- Can block magnets be cut? Cutting block magnets is not recommended. Cutting may destroy the magnet’s structure and magnetism, resulting in uneven magnetic force or damage.
- Will block magnets lose their magnetism? Under normal use conditions, block magnets’ magnetism can last for many years. However, excessive temperature or strong impact may cause the magnetism to weaken.
- Are block magnets resistant to high temperatures? The temperature resistance range of NdFeB magnets is usually 80°C to 230°C, and exceeding this temperature may cause the magnetic force to decay.
- Are block magnets safe? Block magnets are safe for the human body, provided that they are kept away from electronic devices (such as pacemakers).
- How to recycle block magnets? Block magnets can be processed through professional recycling channels to avoid random discarding and ensure that the magnets are safely recycled and reused.
Block Magnets in Other Designs
Aside from Neodymium Block Magnets, TOPMAG offers block magnets composed of Ferrite, Alnico, and Samarium-Cobalt (SmCo) that are suited for a variety of typical applications:
Ferrite Block Magnets are cost-effective and corrosion-resistant, making them ideal for use in a variety of home appliances, such as refrigerators, microwave ovens, and speakers. They are also used in toys and other low-cost, long-lasting items.
Alnico Block Magnets offer excellent temperature stability. Typical uses include tiny home motors, magnetic closures on kitchen appliances, and ornamental magnets.
Samarium-cobalt (SmCo) Block Magnets are strong and temperature-resistant, making them perfect for high-end consumer items like speakers and precise equipment.
