Product Overview
Samarium cobalt disc magnets are permanent magnets produced from sintered SmCo alloys and are commonly selected when operating conditions exceed the limits of neodymium magnets. Their key advantage lies in magnetic stability rather than peak pulling force. For applications exposed to continuous heat, vibration, or long service cycles, this material provides predictable performance without frequent recalibration or replacement.
The disc shape offers a straightforward solution for assemblies that require balanced magnetic fields and simple axial mounting. It is widely used in rotating systems, sensing components, and compact mechanical structures where space is limited but temperature tolerance is critical.
Material & Performance Characteristics
Samarium cobalt magnets exhibit low temperature coefficients and strong resistance to demagnetization. Unlike coated NdFeB magnets, SmCo does not rely heavily on surface treatments to resist corrosion, which reduces long-term performance risks in controlled industrial environments.
Typical operating temperatures reach up to 250 °C, depending on grade, with short-term exposure tolerance even higher. This makes the material suitable for motors and instruments operating close to heat sources or inside enclosed systems.
Technical Parameters
- Material: Sintered samarium cobalt (SmCo)
- Common Grades: Sm2Co17-based compositions
- Shape: Disc / cylindrical
- Magnetization: Axial magnetization through thickness (standard)
- Dimensions: Diameter and thickness produced per drawing or requirement
- Surface Condition: As-sintered; optional coating available if required
- Magnetic Stability: Low irreversible loss under heat and vibration
Dimensional tolerances can be adjusted to match press-fit, bonded, or mechanically retained assemblies.
Application Use Cases
Samarium cobalt disc magnets are typically used in systems where thermal stability outweighs raw magnetic strength, including:
- High-temperature electric motors and generators
- Aerospace control and positioning devices
- Industrial sensors and rotary encoders
- Oil and gas measurement tools
- Laboratory and analytical instruments
In these applications, consistent magnetic output over time helps maintain accuracy and reduces downtime caused by magnetic drift.
Production & Supply Considerations
We support bulk supply aligned with industrial manufacturing schedules. Custom disc sizes, magnetization parameters, and inspection requirements can be coordinated during the quotation stage. Samples are available for functional testing before volume production.
Magnets are packed to prevent chipping and unintended attraction during transport. Documentation such as dimensional inspection records and magnetic test data can be provided to support incoming quality checks and OEM sourcing processes.
FAQ
Q: Can samarium cobalt disc magnets replace neodymium magnets directly?
A: In high-temperature environments, yes. In low-temperature applications where maximum force is required, neodymium may still be more suitable.
Q: Is coating necessary for SmCo magnets?
A: In most indoor or controlled environments, no. Coatings are optional for specific handling or assembly needs.
Q: Are small batch orders available?
A: Prototype and pre-production quantities can be supplied before scaling to bulk supply orders.
Magnetization Options
Disc Samarium Cobalt Magnets
Round Samarium Cobalt Magnets
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