NEODYMIUM COUNTERSUNK MAGNETS

High Performance Countersunk Magnets

Neodymium countersunk magnets are high-performance magnets uniquely shaped to allow secure mounting by screws or bolts. The unique countersink hole design allows the magnet to be fitted flush without protruding from the surface. Besides the standard round form, they come in square, single-hole, or double-hole, thus finding a wide application in kitchen renovations, exhibition arrangements, store displays, and furniture making.

Countersunk Magnets in Standard Sizes & Custom Options

The size of the neodymium countersunk magnets is directly related to their functionality. Larger magnets have a stronger magnetic pull and can carry higher loads; they are used where high stability and fixation for an extended period are required. On the other hand, smaller magnets allow for easier installation and more flexibility in space-restricted areas.

Sizing is critical to ensuring the magnet fits correctly in the system, resulting in maximum magnetic field strength and functional precision.

Ring Countersunk Magnets

The diameter ranges typically from 12.00 mm to 50.00 mm (0.47 to 1.97″).
The height ranges from 4.00 mm to 7.50 mm (0.16″ to 0.30″).
Adhesive force ranges from 1.00 KG to 18.00 KG.

Block Countersunk Magnets

The length ranges typically from 12.00 mm to 80.00 mm (0.47 to 3.15″).
The width ranges from 12.00 mm to 20.00 mm (0.47″ to 0.79″).
The height is 4.00 mm (0.16″). Adhesive force ranges from 1.00 KG to 18.00 KG.

*Furthermore, we understand that specific applications require higher tightening force and harsh outdoor conditions, so we also offer custom rubber coating options to meet these particular needs.

During customization, we ensure that each magnet’s dimensions are exact and give rigorous tolerance limits. The specific tolerances are:
Diameter tolerances range from

12.00 mm to 25.00 mm (0.47″ 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 80.00 mm (3.00″ to 3.15″), tolerance is ±0.40 mm (±0.016″)
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

Axial is the usual direction of magnetization of countersunk magnets. Ring countersunk magnets, being symmetrical, are ideal for fixing in a vertical direction when heavy central pull is required, such as the closure of doors or windows. On the other hand, block countersunk magnets have more significant contact areas and are usually employed in wide-area applications like fixation in large equipment and furniture installations. Their selection is made mainly based on the shape required by the application, as it ensures adequate fixation and stability during the installation.

Ring countersunk Axially

Block countersunk Axially

Countersunk Magnet Features & Characteristics

What is a countersunk magnet? A countersunk magnet has a countersunk hole that allows it to rest flat with the surface without projecting.
What are the uses for countersunk magnets? These magnets are perfect for applications that need secure attachment while maintaining a low-profile look, such as furniture assembly, door/window closures, and equipment installation.
What are the possible forms and sizes for countersunk magnets? Common forms include round and rectangular countersunk magnets in diameters ranging from a few millimeters to several centimeters, with bespoke sizes available upon request.
What equipment do I need to install countersunk magnets? Installation needs screws or bolts. First, drill a hole of the right size, then fasten the magnet with a screw or bolt.
Can countersunk magnets be custom-made? Yes, they may be customized in terms of size, hole diameter, coating, and other parameters to fulfill particular application requirements.
Are countersunk magnets suitable for outdoor use? Anti-corrosion coatings may be applied to countersunk magnets for outdoor use. However, they should be kept out of harsh weather for lengthy periods.
What are the benefits of countersunk magnets? The key benefits are quick installation, a strong and consistent magnetic force, and a flush installation that maintains the magnet’s surface clean and tidy with no protrusions.

Countersunk Magnets in Other Designs

In addition to neodymium countersunk magnets, TOPMAG also provides countersunk magnets from ferrite, alnico, and SmCo. These different materials each serve better in other places:

Ferrite Countersunk Magnets
Ferrite magnets are cheap and resist corrosion well. Thus, they can be used for DIY projects, magnetic door closures, and small appliances like refrigerators where low-cost security is needed.

Alnico Countersunk Magnets
Alnico magnets perform well at high temperatures, making them suitable for home appliances such as ovens, fans, and electric guitar pickups, where temperature resistance and stability are critical.

Samarium-Cobalt (SmCo) Countersunk Magnets
Samarium-cobalt magnets provide strong magnetic power with excellent temperature resistance, which makes them perfect for high-performance applications such as electric motors in power tools, speakers, and precision equipment.