China Neodymium And Ferrite Magnets Manufacturer & Supplier 
Cylindrical through-hole magnets (hollow cylindrical magnets) refer to permanent magnets with machined through-hole structures to meet installation, positioning, or assembly requirements. Many are interested in their types, key parameters, and applications. Below, Xiao Fu will introduce them to you.
Cylindrical through-hole magnets are primarily categorized into two types based on the direction of the through-hole: front-through and side-through. A front-through hole runs axially through the cylinder, with holes drilled coaxially on both ends. This structure is the most common, facilitating direct mounting of the magnet onto a shaft and ensuring good concentricity. Front-through-hole magnets predominantly employ axial or radial magnetization. Common materials include sintered and bonded neodymium iron boron magnets, as well as sintered ferrite magnets. They are widely used in rotating components such as motor rotors and power tools. Side-through-hole magnets feature holes that penetrate the cylindrical sidewall radially or transversely, perpendicular to the magnet's axis. This configuration is primarily used for lateral fixation, positioning, or sensing applications, rather than shaft mounting. Side-through-hole magnets are commonly found in automated equipment, sensor structural components, and specialized assembly scenarios.
Cylindrical through-hole magnets with an outer diameter of only 2mm
In terms of parameters, cylindrical through-hole magnets primarily include magnetic material and grade, outer diameter, inner bore, height, magnetization direction, and temperature resistance. For front-side through-holes, the coaxiality between the inner bore and outer circumference requires special attention, while side-through-holes demand strict control of positional tolerances.
Applications: Front-through-hole magnets are primarily used in motor rotors or structures requiring high-speed rotation, offering advantages in stable installation and uniform force distribution. Side-through-hole magnets are commonly employed in fixing, limiting, sensing, or anti-rotation mechanisms.
The above provides an overview of cylindrical through-hole magnets. For specific product inquiries, please contact our customer service team for quotations and sample production.
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