Calculate your array field strength and explore Chinese manufacturing capabilities for high-precision multipole magnetic cylinders.
Input target dimensions in mm
China manufacturing insights
Access to raw rare-earth materials (NdFeB/SmCo) locally lowers raw material costs by 15-30% compared to US/EU sourcing.
Custom assembly fixtures and magnetizing coils are developed in-house, reducing prototype lead times to under 5 weeks.
Reputable suppliers provide 3D FEA verification and multi-axis field mapping reports to ensure gradient targets are met.
Building a Halbach cylinder is not just about gluing magnets together. The intense repelling forces require robust containment strategies. Here are the baseline capabilities from top-tier Chinese manufacturers.
| Parameter | Standard Capability | Extreme/Custom |
|---|---|---|
| Outer Diameter (OD) | 20mm - 200mm | Up to 500mm (requires segmented housing) |
| Segment Count | 8, 12, 16 segments | 24, 32+ segments (diminishing returns on field) |
| Material Grades | NdFeB N35-N52, N45SH | SmCo28, N42UH (for high heat environments) |
| Dimensional Tolerance | ±0.1 mm | ±0.05 mm (post-assembly grinding) |
| Retention Method | Epoxy bonding, Aluminum sleeve | Carbon fiber wrapping, Titanium sleeve |
Inexperienced factories may try to manually force segments together. This causes severe chipping on the brittle NdFeB edges and can lead to structural failure at high RPMs.
Demand photos of their non-magnetic assembly fixtures and specify minimum gap tolerances.
Assuming a perfect theoretical formula (like the calculator above) without accounting for discrete segment efficiency loss or edge effects.
Require the factory to perform a 3D FEA simulation before tooling, and provide a physical field map report before shipment.
Typical lead time is 4-6 weeks for initial prototypes, which includes 2-3 weeks for custom segment tooling and 2 weeks for assembly, potting, and magnetization.
Yes. While NdFeB (up to N45SH or N42UH) is standard, we assemble SmCo28 cylinders for aerospace or downhole applications where temperatures exceed 200°C. Note that SmCo is more brittle, requiring specialized assembly fixtures.
We use non-magnetic custom aluminum or 3D-printed resin fixtures to hold segments in place before epoxy potting or shrink-fitting the outer retention sleeve. Individual segments are often magnetized before assembly.
For a fully assembled and ground Halbach cylinder, we typically hold ±0.05mm to ±0.1mm on the OD/ID. Tighter tolerances require additional post-assembly precision grinding.
Review our manufacturing limits or explore our product lines before submitting an RFQ.
Send us your RFQ requirements (from the configurator above) along with your CAD files. Our engineering team will review manufacturability and provide a quote.
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