Ferrite Ring Magnets
Axial and radial ferrite ring magnet options for speakers, motors, and electro-mechanical modules.
Product Overview
Ferrite ring magnets are critical components in speaker magnetic circuits, motor assemblies, and magnetic coupling systems. The ring geometry enables concentrated flux paths unavailable with solid disc shapes. FerriteCustom manufactures ferrite rings from OD 8mm to 220mm with wall thicknesses from 2mm upward via wet pressing for anisotropic grades. Our annual ring magnet capacity exceeds 20 million pieces across all size classes.
Technical Specifications
Available Grades
Y30, Y30BH, Y35, Y40
Size Range
OD 8–220 mm, ID 4–160 mm, H 3–30 mm
Max Temp
250°C
Process
Wet pressing (anisotropic) + Sintering at 1200–1250°C
Surface Finish
As-sintered, OD/ID ground, Face ground
Magnetization
Axial, Radial, Multipole (4P–24P)
Key Features
- Anisotropic wet pressing delivers BHmax up to 4.0 MGOe (Y40 grade)
- Speaker-grade flux uniformity with ≤3% Br variation within production lot
- ID/OD concentricity controlled to ≤0.1 mm for motor applications
- Compatible with automated assembly: consistent dimensions reduce reject rates
- Corrosion-proof without coating — ideal for outdoor and humid environments
Customization
- Custom OD, ID, and height to print specifications with DFM review
- Radial or multipole magnetization for pump and encoder applications
- Matched pairs or sets sorted by Br value for speaker manufacturing
- Chamfered or beveled edges to prevent chipping during handling
- Individual gauss-tested and sorted output for critical motor programs
Typical Applications
Frequently Asked Questions
Related Categories
Ferrite Giant Ring Magnets
Oversized ferrite ring magnets (OD 60 mm+) for high-power speaker drivers, industrial motors, and magnetic couplings.
Ferrite Multipole Ring Magnets
Radially and axially magnetized multipole ferrite rings for water pumps, encoders, and sensor feedback systems.
Ferrite Speaker Driver Magnets
Ferrite ring and disc magnets optimized for loudspeaker driver motor structures and subwoofer assemblies.
Ferrite Disc Magnets
Standard and custom ferrite disc magnets for motors, sensors, and magnetic assemblies with stable high-volume production.
Request Technical Assessment
Inquiry Email
Copy the email, or open your default email app to start an inquiry.