China Neodymium And Ferrite Magnets Manufacturer & Supplier 
Screw hole magnets are a kind of special magnets, usually used in occasions that need to be fixed or mounted, this kind of magnets usually have one or more screw holes in the center or other parts of the magnet, so that they can be firmly fixed to the surface through the screws or bolts, in order to ensure that the screw hole magnets can be used effectively, the following points are worth your attention.
Choosing the right magnet material is critical
Screw hole magnets are usually made of Neodymium (NdFeB) material. This material is known for its strong magnetic force and small size. However, in some applications, it may be necessary to choose other materials, such as Ferrite, for higher temperatures or different corrosion resistance needs.
The picture below shows a 15mm diameter round countersunk magnet 15x3mm.
Confirm the diameter and depth of the screw holes
The size and dimensions of the screw holes must match the screws or bolts used. A hole that is too large will cause the screw to be poorly secured and affect the stability of the magnet, while a hole that is too small may prevent the screw from passing through smoothly or damage the magnet.
Selection of appropriate plating considering the usage environment
Most screw hole magnets are plated on the surface, such as galvanized, nickel-plated or epoxy-plated to enhance their corrosion resistance, and black epoxy coating is recommended for harsher environments.
More neodymium magnet coating comparisons: Neodymium Magnet Coating Type And Best Choice
Avoid magnet breakage by using proper torque tools
When installing screw-hole magnets, attention should be paid to the tightness of the screws. Appropriate torque tools should be used and excessive pressure should be avoided to damage the magnets; in some special applications, the use of elastic washers may be considered.
Don't get the magnet pole orientation wrong
Confirm the pole direction with the magnet manufacturer to make sure the magnet works as intended, some countersunk magnets need to be used in pairs (2).
The above is about the screw hole magnet use need to pay attention to the point, our company is a permanent magnet manufacturers, can process all kinds of shapes of screw hole magnets. Need wholesale, customized welcome to contact us online.
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