High Quality Arc SmCo Magnets

Permanent magnetic segments composed of samarium cobalt alloy are known as arc-shaped SmCo magnets. They are appropriate for rotational parts and assemblies where alignment and field homogeneity are crucial because of their curved shape, which enables them to fit naturally into circular and semi-circular magnetic circuits. Samarium cobalt shows stable magnetic behavior at high temperatures and in situations where long-term dependability is crucial, in contrast to many ferrite or rare-earth substitutes.

• Composition: Sintered Sm2Co17 or SmCo5 samarium cobalt alloy
• Shape: Arc / segment - designed for cylindrical assemblies
• Magnetization: Radial (standard) or customized pole arrangements based on design needs
• Coating/Finish: Typically as‑sintered; coatings such as epoxy or PTFE available where surface protection is required
• Temperature Stability: Operational performance maintained at elevated working temperatures with minimal irreversible loss
• Mechanical Traits: High coercivity and resistance to demagnetization under thermal and mechanical stress

Samarium cobalt's intrinsic resistance to oxidation and thermal degradation makes it a preferred choice for components that cannot afford magnet performance drift over time.

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Arc SmCo magnets are commonly used where magnetic field stability and performance under heat or stress are required:

• Industrial Motors & Generators: Rotors and stator segments needing consistent flux and torque performance
• Aerospace Mechanisms: Control surfaces and guided actuation where thermal stability is critical
• Automated Tooling & Fixtures: Magnetic segments in precision assemblies and high‑duty fixtures
• Magnetic Sensors & Encoders: Field sources for rotational and position sensing applications
• Specialized Test and Measurement Equipment: Controlled magnetic fields in tight geometries

In many of these systems, magnet geometry and field orientation directly influence system behavior, so predictable performance is essential.

When selecting or specifying arc samarium cobalt magnets:

• Dimensional Fit: Provide accurate inner and outer radii, arc length, and thickness to ensure a precise mechanical fit and minimize assembly gaps.
• Magnetization Pattern: Radial magnetization is typical for rotary designs, but tailored patterns (multi‑pole, alternating) can support specific field profiles.
• Thermal Requirements: Clarify operating temperature ranges to guide grade selection and avoid thermal demagnetization during peak loading.

Coating Selection: While SmCo resists corrosion, specific environments (humid, chemical exposure) may warrant additional surface protection.

Accurate engineering drawings or CAD files during the enquiry stage streamline feasibility assessments and tooling setup.

We provide bulk orders and OEM services for industrial programs. Customization options include:

• Tailored segment dimensions and curvature based on application geometry
• Specified magnetization directions and pole configurations
• Optional surface coatings for abrasion, moisture, or chemical resistance
• Packaging and logistics solutions for production lines

For precise quoting, include target part drawings, required magnetic performance, and anticipated volume - this enables alignment of production tooling and delivery planning early in the design cycle.

Magnet batches can be supplied with supporting documentation to assist quality control and incoming inspection:

• Dimensional inspection reports
• Magnetic property testing (flux density, coercivity)
• Coating verification reports
• Traceability records for manufacturing accountability

These artifacts help maintain consistency across lots and support validation for industrial standards.

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