China Neodymium And Ferrite Magnets Manufacturer & Supplier 
In the magnet use scenario, the suction force is an important indicator to evaluate the performance of the magnet, just saw a netizen searching for 3mm magnet and 2mm magnet which suction force is strong? The following is an introduction to this issue.
3mm magnet and 2mm magnet which suction is stronger, mainly depends on their materials, size and magnetization direction, if 3mm and 2mm is the magnet diameter, thickness is the same, the same direction of magnetization, then the 3mm magnet suction will be stronger. But if 3mm and 2mm is the thickness of the magnet, the diameter is different, then the general diameter of the larger suction will be stronger. This is because the volume of the magnet is directly proportional to its magnetic properties.
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Again, the magnet material piece, if 3mm and 2mm magnets use different materials, the higher performance material magnet suction may be stronger, of course, this is in the case of their size is about the same.
The direction of magnetization also has a great influence on the suction force, usually the magnetization along the direction of the larger contact area, the suction force will be stronger.
Comparison of actual suction force;
The suction force of N52 NdFeB round magnets with a diameter of 3mm and a thickness of 1mm is about 300-400g.
Diameter 2mm, thickness 1mm NdFeB strong magnet round suction force is about 100-150g.
It can be seen that the suction force of 3mm magnet is significantly stronger than 2mm magnets.
The above is the introduction of the magnet problem 3mm magnet and 2mm magnet which has stronger suction, if your application requires stronger adsorption ability, it is recommended to prioritize the choice of magnets with larger diameter. If there are special needs, such as high temperature or corrosion-resistant environment, you can also consider samarium cobalt magnets or neodymium iron boron magnets with good protective coating added.
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