China Neodymium And Ferrite Magnets Manufacturer & Supplier 
Does the size of a magnet affect its magnetic strength? This is a question that many people often ask when selecting magnets. In fact, the size of a magnet is closely related to its magnetic properties.
The “strength of magnetism” of a magnet can be understood as its ability to exert an attractive force on external objects. For example, terms like magnetic force, pulling force, and magnetic flux are commonly used, and their magnitude is primarily influenced by the following two factors.
Neodymium bar block magnets in various sizes
1. Material (magnetic performance grade)
For example, compared with N35 magnets, N52 neodymium magnet grade of the same size have stronger magnetic properties and greater pulling force.
2. Volume (size)
Under the premise of the same material, the larger the magnet, the greater the magnetic field it can generate, and the stronger the adsorption force on objects such as iron.
For example, there are magnetic strips around the refrigerator door. Although they look long, they are very thin and have weak magnetic force, which is only enough to hold the refrigerator door closed. However, a small 1 cm neodymium iron boron magnet, although small in size, can lift metal parts that are dozens of times heavier than itself. This shows that magnets are not necessarily stronger the longer they are, the material and thickness are also important.
Another example: two magnets made of the same material but with different dimensions, both rated N52 grade. One circular magnet measures 20x3mm and has a pulling force of approximately 5kg, while the other circular magnet measures 10x1mm and has a pulling force of only about 0.65kg. This demonstrates how volume directly affects magnetic force.
Although larger magnets can provide stronger magnetic force, they are heavier, more expensive, and more difficult to install. They can also interfere with other components, be overly sensitive, and pose safety hazards (such as pinching hands when attracting objects). Therefore, when using magnets, it is not always better to go for larger sizes; instead, it is important to select the appropriate specifications based on actual application requirements.
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