For engineers designing magnetic encoders, brushless DC motors, or through‑shaft couplings, our Axial Ring Magnets provide a compact, high‑energy solution with magnetic poles oriented through the thickness. Unlike diametrically magnetized rings, axial rings generate a flux path between the two flat annular faces, enabling non‑contact sensing and torque transmission around a central shaft. Using premium sintered NdFeB (grades N35 to N52) or SmCo for high‑temperature stability, we produce rings with exceptional concentricity and multi‑pole patterns tailored to your pole count and field strength requirements.
Description
Technical Parameters
Axial Ring Magnets – Precision Magnetization for Rotary Motion Control
Key Engineering Advantages
Custom Multi‑Pole Patterns
We can magnetize axial ring magnets with 2 to over 100 poles on the annular face, precisely positioned for Hall‑effect sensors or encoder feedback. Our in‑house multi‑pole magnetizing fixtures ensure consistent pole transition zones and minimal angular deviation.
Tight Geometric Tolerances
Using ID/OD grinding and wire EDM, we achieve concentricity as tight as 0.05mm and squareness between faces within 0.05mm. This precision is critical for high‑speed rotating assemblies where imbalance must be avoided.
Wide Material & Grade Selection
Choose from NdFeB (N35‑N52, plus H/SH/UH for up to 180°C) or SmCo (up to 350°C). Our raw material purity ≥95% ensures stable remanence and low irreversible flux loss over the product lifetime.
Manufacturing Integrity & Quality Assurance
Every axial ring magnet begins with virgin rare‑earth alloys from audited suppliers. Our fully integrated process includes vacuum induction melting, jet milling, pressing in a magnetic field, sintering, and multi‑stage heat treatment. Precision grinding and EDM ensure final dimensions meet your drawing. We perform 100% visual inspection, magnetic flux measurement (Helmholtz coil or Gauss meter), and optional salt‑spray testing. Our IATF 16949 and ISO 9001 certifications guarantee traceability and consistency for high‑volume production.
IATF 16949:2016 ISO 9001:2015 RoHS & REACH Flux Test Report
Packaging & Logistics
Ring magnets are fragile due to their thin walls. We pack each ring in a dedicated foam slot within an 8‑cell anti‑shock inner box, then into reinforced export cartons. This protects against chipping and demagnetization during transit. Free samples are available for evaluation, with lead times as short as 10‑15 working days for custom sizes.
FAQ:
Do magnetic chucks lose holding force over time?
No, permanent magnetic chucks use stable neodymium magnets with <1% loss over 20 years.
Can electro-permanent chucks hold non-ferrous workpieces?
No, magnetic workholding only works on ferromagnetic materials (steel, iron, nickel alloys).
What happens if power fails on an electro-permanent chuck?
The workpiece remains held because the magnet circuit is locked in the "on" state without power consumption.
Need Axial Ring Magnets for Your Rotary System?
Share your required OD, ID, thickness, pole count, and operating temperature. Our engineering team will recommend the optimal material and magnetization pattern, and provide a sample for validati
Request Quotation & Free Sample
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