Neodymium Disc Magnet

Neodymium magnets are consists of an alloy of Neodymium, Boron, and Iron. Neodymium disc magnets have become a preferred solution for a wide variety of industrial and civil applications. Neodymium disc magnet is typically measured by the diameter and thickness, then its thickness is always smaller than the diameter. The great majority of Neodymium disc magnet are axially magnetized and widely served various types of application, such as holding purpose and speaker magnet. Diametrically magnetized pattern is also available for circular magnet and most of diametrically magnetized Neodymium disc magnet are used as the sensor magnet. Production efficiency of Neodymium disc magnet has gained a remarkable development with the widely application of multi-wire sawing.

How to Increase Pull Force of Neodymium Disc Magnet？

Consumers from holding or mounting application commonly have the lively interest in pull force of Neodymium disc magnets. Pull force of regular axial magnetized Neodymium disc magnet can be enhanced through increasing thickness and diameter, select higher grade (e.g. N52 instead N35), shorten air gap from attracting workpiece, or utilize any combination of the above solutions. In addition, pull force of axially multipole magnetized magnet is definitely higher than pure axially magnetized magnet for the same Neodymium disc magnet.

How long is the service life of the Neodymium(NdFeB) magnet disc?
The life of permanent magnets is endless.

Introduction to the three major factors affecting the magnetic force of the magnet disc

Factor one: temperature. There are dozens of different types of magnets (for example: ferrite magnets, neodymium iron boron magnets, bonded neodymium iron boron, alnico, cobalt, iron chromium cobalt, injection-molded ferrite, etc.) and materials. The corresponding temperature limit. Generally speaking. During the use of the product, there will be no demagnetization if the temperature is lower than the limit of the magnet. (For example: The high temperature of the brushless out-rotating motor is 80-100 degrees. In the case of ensuring that the demagnetization will not exceed 5%, the magnet material of 120 degrees is generally used. Of course, this is for the material of the neodymium iron boron magnet.) So The non-demagnetization and lifetime of the magnet depend on the temperature of the product used and the temperature-resistant material of the magnet.

Factor two: the existence of an alternating magnetic field. Anyone who has a certain knowledge of magnets knows that magnets are divided into N, S poles or multiple poles. If there is another magnetic field around the magnet, it will cancel a part of the magnet's magnetic force. This is what people say will demagnetize in the range of operating temperature.

Factor three: mechanical vibration. This is related to the assembly. The magnet rubs against the product during the assembly process. Because the material of the magnet is fragile, the body is worn and the size becomes smaller, and the magnet will gradually weaken.

Therefore, please consider the above three points when selecting magnets and product design.

Typical available dimention and grade of Hongyu Magnetic Disc

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