The Ferrite Ring Magnet measures 37mm outer diameter, 19mm inner diameter, and 9mm thickness in ceramic ferrite material, with axial or radial magnetization options and excellent natural corrosion resistance. These ferrite ring magnets are made from ceramic ferrite material — fundamentally different from the NdFeB neodymium magnets — ferrite produces lower magnetic flux density per volume than neodymium but is inherently corrosion-resistant without any coating, significantly more affordable, and widely used in applications requiring moderate magnetic force over large surface areas at low cost.
The circular ferrite magnets ring shape with 19mm inner diameter is the classic form used in DIY loudspeaker driver builds — the voice coil assembly sits in the gap between the ring magnet’s inner pole face and an external pole piece, and the magnetic field crossing that gap is what drives the speaker cone. This ring ferrite magnet’s 19mm bore also allows central bolt or shaft mounting, making it useful in motor rotor assemblies, magnetic coupling, and teaching models demonstrating magnetic field through a hollow core.
this ferrite magnet 37mm produces lower holding force than a neodymium magnet of equivalent dimensions — ferrite suits applications where moderate force, long-term stability, and low cost matter more than maximum field strength. Available from StemVolt, offering quality robotics parts and DIY kits at competitive prices. This ferrite ring magnet is ideal for DIY projects, robotics applications and STEM models.
Related Product:
- Checkout Ferrite Bar Magnet 40x25x10mm
Features:
- Ceramic ferrite — inherently corrosion-resistant without any coating
- Ring form with 19mm bore for central shaft/bolt or voice coil mounting
- Axial or radial magnetization suits speaker, motor, and sensor builds
- 37mm OD gives substantial pole face area for moderate force applications
- Lower cost alternative to neodymium for large-area magnetic builds
Technical Specifications:
Applications:
- Ferrite Ring used for DIY loudspeaker driver voice coil magnet build
- College project uses ferrite ring magnets for axial vs radial field demo
- India maker uses circular ferrite magnets for DIY speaker cabinet build
- Motor project uses ring ferrite magnet for rotor magnet assembly
- STEM kit uses ceramic ring magnet for hollow-core field demonstration
Package Includes
- 1 × Ferrite Ring Magnet 37mm OD x 19mm ID x 9mm Thick
Parth Sarkar –
Strong magnetic performance for its size and thickness.
Savitha Subramanian –
The ordering process was smooth, and the product arrived securely packed. The ring design with a center hole made it useful for DIY engineering applications.
Prasun Modi –
Nationwide delivery was fast and hassle-free.
Sachin More –
Perfect ring magnet for STEM learning projects.
Kaustav Mondal –
Purchased this magnet for an ATL lab project. The magnet was well-finished, durable, and worked perfectly in our experimental setup.
Garima Kohli –
Quick response from the support team helped me choose the right size.
Mohit Chaudhary –
Protective packing kept the magnet safe during shipping.
Arjun Mehta –
Trustworthy seller with genuine educational components.