10 Hot FAQs About Screw Countersunk Magnets

Countersunk magnets are a special type of magnet characterized by the use of a special process to embed holes below the surface of the magnet material. The holes in these magnets are typically measured by outer diameter, through-hole diameter, depth, and angle, with the angle generally being 90 degrees. The dimensions of countersunk holes are usually determined based on standard screw sizes, such as commonly used M3, M4, etc. Regarding countersunk magnets, customers often encounter many questions. Below are the top 10 frequently asked questions and answers compiled by Xiao Fu.

1. What materials are used for countersunk magnets?

Common materials for countersunk magnets include neodymium iron boron (NdFeB), which has extremely high magnetic properties and is suitable for applications requiring strong magnetic force. Another material is samarium cobalt (AlNiCo), which is relatively resistant to high temperatures and suitable for special environments. Ferrite materials are less common because they require molds for processing and do not have very good magnetic properties.

2. What shapes are available for countersunk magnets?

There are many, the most common being round countersunk, square countersunk, rectangular countersunk, and arc-shaped countersunk. Some special ones include triangular countersunk and special-shaped countersunk.

Countersunk and through hole neodymium magnets

3. Is it difficult to process countersunk magnets?

For magnet manufacturers, it is not complicated. The processing flow is only one step more than normal through holes. For individuals who want to process countersunk holes, it is not recommended.

4. How much pulling force can a countersunk screw magnet withstand?

The pulling force depends on the material, size, and surface used for the magnet. The pulling force of neodymium iron boron magnets generally ranges from a few kilograms to several dozen kilograms.

5. Are countersunk magnets affected by temperature?

Yes, the magnetic properties of countersunk magnets are significantly affected by temperature, especially neodymium magnets. In environments above 80°C, the magnetic force of ordinary magnets will weaken, so it is necessary to choose magnets with a higher temperature resistance rating or made of other materials.

6. What is the service life of a countersunk screw magnet?

The service life of a countersunk screw magnet depends on the material and environmental factors. Generally, the magnetic life of neodymium iron boron magnets can last over 10 years, but high temperatures, strong impacts, and corrosive environments can shorten their service life.

7. How are screw-mounted magnets installed?

When installing screw-mounted magnets, the screw can be passed through the magnet's countersunk hole and secured to the desired installation location. During installation, ensure that appropriate screws are used; some applications may require two magnets to be used together, in which case matching magnetization is required.

8. What is the price range for screw-mounted countersunk magnets?

The price depends on the magnet's material, size, magnetic strength, and order quantity. Bulk purchases typically qualify for discounts.

9. Where can countersunk magnets be purchased?

There are many channels for purchasing countersunk magnets. If you are a small-scale user with low requirements for dimensions and performance, you can purchase them from local hardware stores or e-commerce platforms like Amazon. If you are a corporate user with large-volume requirements and strict specifications for product dimensions and performance, we recommend directly contacting magnet manufacturers for bulk customization.

10. What are the main applications of screw countersunk magnets?

They are primarily used for fixed installations and are applied across many industries, such as electronic devices, mechanical equipment, magnetic lighting fixtures, magnetic door locks, security equipment, and home appliances.

The above are 10 common questions about countersunk magnets. If you need a quote or would like to learn more, please send us an inquiry.

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