Key Knowledge Points of Small Magnets with Holes

Small magnet with holes usually refers to a small magnet with one or more holes on its surface, which is easy to pass through with a wire, string or other fixture.Today, this article will introduce small magnet with holes shape and hole type, use, material and so on in detail, hope it will be helpful to you.

Main material for small magnets with holes;

Depending on the material, small magnets with holes can be made of ceramic ferrite, neodymium magnets, samarium cobalt and alnico, etc. Ceramic ferrite is low-cost but has a weak magnetic force. Neodymium magnets are very strong and are suitable for applications that require greater suction. Samarium Cobalt and Alnico are mainly used in high temperature environments and have better corrosion resistance.

Ultra-small circular magnet with hole, outer diameter only 1.5 mm

Main types of shapes of small magnets with holes;

Round small magnets with holes: this is the most common type, there is a round hole in the center of the magnet, the holes can be through holes or countersunk holes, suitable for situations where the magnet needs to be fixed in a certain position, for example, fixed by screws or pins through the holes.

Bar/Block small magnets with holes: the holes can be on any surface, and the position can be in the center, on both sides, etc. according to the customer's requirements.

Small square magnets with holes: usually with a hole on one side. The hole can be in the center or at the edge.

Cylindrical small magnets with holes: the position of the holes can be on the end or on the side, and the holes can be through holes or not.

As for ring shaped magnets with holes, they are usually in larger sizes, and small size magnets are inherently small and not well processed.

Hole Position for Small Magnets with Holes

Center Hole: The hole is located in the geometric center of the magnet and is most commonly used for mounting and securing symmetrical structures.

Eccentric Holes: Holes are located off-center of the magnet and are used for specific application requirements such as adjusting the mounting position or reducing the effects of magnetic fields.

Multiple Hole Design: Multiple holes in the magnet, often used for more complex fixings or where increased mounting flexibility is required.

Edge Holes: Holes are located at the edge of the magnet for specific assembly requirements, such as when the magnet needs to be recessed into a tight space.

Shape of the holes of the small magnets with holes;

Round hole: the most common shape, suitable for use with round screws or pins.

Oval holes: Provide some room for adjustment and are suitable for locations where flexible mounting is required.

Square holes: Suitable for use with square pins or special fixings.

Target applications for small magnets with holes;

Small magnets with holes are commonly used in a variety of sensors and detectors, especially rotary encoders and Hall effect sensors.

In electronics, small magnets with holes can be used to hold different parts together, especially where removable or rotating connections are required.

In mechanical devices, perforated magnets can be used as clamps or fixing elements.

In toys, models, and DIY projects, small magnets with holes can be used to secure and connect moving joints, rotating parts, or other movable components.

At present, small magnets with holes are mainly made of rare earth NdFeB because the magnetism is strong enough and easy to process, if you are looking for NdFeB small magnets with holes in a specific size, shape or aperture, or have questions about how to use these magnets correctly, please provide me with more information and I will try my best to help you answer them.

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