Ferrite Arc Magnets

Ferrite arc magnets (also known as ceramic segment, tile, or motor magnets) are permanent magnets formed with a curved geometry to match cylindrical magnetic circuits. Multiple segments fit around a rotor or stator to form a continuous magnetic field in high-efficiency DC motors, generators, pumps, and industrial fans. As an ISO-certified and IATF 16949-aligned manufacturer, we supply custom ferrite arc magnets engineered strictly to your technical drawings and performance requirements for global OEM motor manufacturers and industrial equipment producers.

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Custom Ferrite Arc Magnets for Motors and Industrial Equipment

As an ISO-certified and IATF 16949-aligned manufacturer, we supply custom ferrite arc magnets engineered strictly to your technical drawings and performance requirements for global OEM motor manufacturers and industrial equipment producers.

Technical Specifications

Parameter	Specification Details
Material System	Hard ferrite (Strontium Ferrite SrFe12O19 or Barium Ferrite BaFe12O19)
Common Grades	C5/Y25, C8/Y30, C11/Y35 (or customer-specified international equivalents)
Remanence (Br)	Grade-dependent (typical commercial range: 380 - 420 mT for high-performance grades)
Coercive Force (Hcb)	Grade-dependent
Intrinsic Coercive Force (Hcj)	200 - 335 kA/m (varies by formulation to resist demagnetization)
Max Energy Product ((BH)max)	26 - 34 kJ/m3 (standard to high-performance tiers)
Geometry & Dimensions	Inner/Outer Radius, Arc Angle, Chord Length, Axial Height, Radial Thickness (Customized per drawing)
Surface & Finish	As-sintered ceramic surface; precision diamond grinding available for critical tolerances (+/-0.05 mm typical)
Coating	None required (inherent ceramic chemical stability prevents oxidation)

Core Material Advantages for Industrial Buyers

Cost-Efficient Volume Production: Hard ferrite relies on iron oxide combined with strontium or barium compounds, completely eliminating exposure to rare-earth price volatility. This delivers a stable, optimized raw-material cost structure for high-volume motor programs.

Superior Demagnetization Resistance: High intrinsic coercivity (Hcj) ensures structural and magnetic stability under heavy opposing magnetic fields during peak motor operating cycles.

Thermal Stability: Standard formulations operate reliably up to 250°C, ensuring dependable performance in high-heat industrial and automotive environments.

Inherent Corrosion Resistance: As a chemically stable ceramic oxide, ferrite does not oxidize in standard operating environments, completely bypassing the risks of coating delamination or flaking during assembly.

Customization Capabilities

To maintain uniform air gaps and optimal magnetic performance, modern motor designs require high-precision manufacturing. We machine and customize segments based on your exact operational data:

Geometric Dimensions: Inner/outer diameter, arc angle, radial thickness, and axial length strictly machined to print.

Anisotropic Orientation: Magnetic particles are aligned via external magnetic fields during pressing to maximize flux density in the preferred direction.

Magnetization Profiles: Single-direction or custom multipole arrangements tailored to your stator or rotor circuit.

Strict Mechanical Tolerances: Advanced diamond grinding controls thickness and radius to ensure smooth automated or manual assembly.

Typical Industrial Applications

Permanent Magnet Motors: Fractional-horsepower DC motors, household appliance motors, and industrial actuators.

Automotive Auxiliary Systems: Radiator cooling fans, HVAC blower motors, window lift motors, and windshield wiper drives.

Fluid Handling Equipment: Circulator pumps, drainage pumps, and industrial blowers.

Rotating Equipment: Small generators and alternative magnetic assemblies operating within ferrite flux thresholds.

Manufacturing Process & Quality Control

Raw Material Processing: High-purity powders are batched, milled, and blended precisely to target grade formulations.

Magnetic Pressing: Advanced tooling compacts the material under an external magnetic field to establish high anisotropy.

Sintering: High-temperature kilns densify the ceramic structure, locking in mechanical strength and magnetic integrity.

Precision Grinding: Sintered parts undergo diamond grinding to meet tight radial and thickness tolerances.

Quality Inspection: Every batch undergoes strict testing for remanence (Br), coercivity (Hcb/Hcj), dimensional accuracy via optical gauges, and magnetic pole verification.

Secure Packaging: Segments are bulk-packaged in partitioned trays and reinforced export cartons to prevent edge chipping and transit damage.

Request a Custom Quotation

To enable our engineering team to evaluate and quote your project efficiently, please provide the following details:

2D Engineering Drawing or 3D CAD Model (PDF, STEP, or IGES format preferred)
Required Ferrite Grade or Target Magnetic Properties (Br, Hcj)
Exact Dimensions (Inner/outer radius, thickness, arc angle, height)
Magnetization Direction & Pole Count
Estimated Annual or Per-Batch Quantities

FAQ

Q: What are ferrite arc magnets?

A: Ferrite arc magnets are curved permanent magnets manufactured from hard ferrite ceramic material. Their curved geometry allows them to fit precisely around cylindrical motor or generator assemblies.

Q: What are ferrite arc magnets also called?

A: Common industry names include ferrite segment magnets, ceramic arc magnets, ferrite motor magnets, ferrite tile magnets, and ceramic segment magnets.

Q: Are ferrite arc magnets suitable for high-efficiency motors?

A: Yes. They are widely used in permanent-magnet motor designs where required performance targets can be met with ferrite, offering an optimal balance of cost-efficiency and reliable output.

Q: Are ferrite magnets stronger than neodymium magnets?

A: No. Neodymium (NdFeB) magnets provide significantly higher magnetic energy density. Ferrite is chosen when its magnetic performance is sufficient and advantages like lower cost, excellent corrosion resistance, and rare-earth-free stability are prioritized.

Q: Do ferrite arc magnets need a protective coating?

A: Generally, no. Ferrite magnets possess inherent chemical stability and corrosion resistance, eliminating the need for conventional electroplated metal coatings.

Q: What specifications should I include when requesting a quote?

A: For an accurate and rapid quotation, please share your 2D/3D drawings, target grade (or performance specs like Br and Hcj), exact dimensions, pole/magnetization requirements, and expected order volume.

Q: Can you manufacture custom arc magnets based on samples?

A: Yes. In addition to manufacturing from engineering drawings, we can reverse-engineer and produce custom ferrite arc magnets based on your physical samples.

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