Custom round magnets with drilled holes are a kind of precision customized magnetic components with integral forming and reserved mounting holes, which are specially designed for equipment assembly, fixed installation and structural positioning scenarios that require bolt fixing and mechanical connection. Ordinary round magnets are solid and holeless, which can only rely on glue bonding and magnetic adsorption for fixing, with poor firmness and easy to fall off during long-term equipment operation. Custom drilled round magnets integrate magnetic performance and mechanical installation structure, with reserved precise mounting holes in the center or eccentric position of the round magnet, which can be directly fixed on equipment components through bolts, screws and rivets, realizing mechanical hard connection and fixing, with higher installation stability and stronger bearing capacity, and are widely used in various mechanical equipment, electronic appliances and automated production equipment.

In terms of customization parameters of drilled round magnets, full-dimensional personalized customization can be realized, including outer circle diameter, magnet thickness, hole diameter, hole position distribution, hole depth and tolerance accuracy. The product specifications cover micro small-size drilled round magnets (diameter 3mm-20mm), medium-size conventional drilled magnets (diameter 20mm-50mm) and large-size thickened drilled round magnets (diameter 50mm-200mm). The hole position supports central through hole, eccentric through hole, counterbore hole, blind hole and multi-hole distributed customization. The counterbore hole design is the most mainstream, which can sink the bolt head into the magnet surface, ensuring the flatness of the magnet installation surface and avoiding the protrusion of the bolt affecting equipment assembly and operation. The dimensional tolerance of outer circle and hole position can be controlled within ±0.02mm, which fully meets the high-precision assembly requirements of precision equipment.

In terms of material classification, custom drilled round magnets include neodymium iron boron drilled magnets, ferrite drilled magnets, samarium cobalt drilled magnets and alnico drilled magnets. Neodymium iron boron drilled round magnets have strong magnetic force, small volume and high precision, and are suitable for precision electronic equipment, sensor positioning components and small automated jigs; ferrite drilled round magnets have stable performance and high cost performance, with good wear resistance and anti-aging performance, and are widely used in household appliances, ordinary mechanical equipment and industrial fixing components; samarium cobalt drilled magnets have high temperature resistance and corrosion resistance, suitable for high-temperature working equipment and special environmental industrial facilities; alnico drilled round magnets are applied to high-temperature electrical equipment and precision instrument components due to their excellent high-temperature stability.

The drilling processing technology of round magnets is the core of customized products. Ordinary magnet drilling is easy to cause edge cracking, hole wall burrs and magnetic performance attenuation. Professional customized production adopts secondary precision processing technology after magnet integral forming and magnetization. Firstly, the round magnet is sintered and formed according to the outer circle size, and then high-precision numerical control drilling and hole wall finishing are carried out. The whole process adopts low-stress cutting technology to avoid magnet cracking and internal structural damage caused by drilling. For counterbore drilled magnets, one-time forming processing of counterbore and through hole is realized by precision milling equipment, with smooth hole wall and no burrs, ensuring the matching accuracy with standard bolts. After drilling, the magnet will be polished and surface treated to eliminate processing marks and improve surface finish.

Custom drilled round magnets support personalized performance and structural optimization. According to customer’s installation and use needs, it can realize unilateral strong magnetic customization, multi-pole magnetization customization and anti-demagnetization performance optimization. For magnets used in vibrating and impact environments, the hole position structure can be optimized to enhance the stress resistance of the installation part and avoid cracking and damage during bolt locking; for magnets used in high-precision positioning equipment, the concentricity of the outer circle and the hole position is strictly controlled to ensure the accuracy of equipment positioning and assembly. At the same time, it supports customized surface treatments such as nickel plating, zinc plating and epoxy coating to adapt to different working environments of high humidity, high temperature and corrosion.

Drilled round magnet customized products have a wide range of application scenarios. In the mechanical automation industry, they are used for automated jig positioning, conveyor belt fixing and mechanical limit components; in the electronic and electrical industry, they serve household appliance fixing parts, motor end cover positioning components and electrical switch magnetic parts; in the precision instrument industry, they are applied to sensor fixing, detection instrument positioning and experimental equipment auxiliary components; in the new energy industry, they are used for new energy vehicle parts fixing, energy storage equipment positioning and photovoltaic equipment installation components. The mechanical fixing mode of drilled round magnets solves the problem of unstable bonding of ordinary magnets, greatly improves the service stability and service life of magnetic components, and is a essential customized magnetic part in industrial assembly.