Single-piece radial multipole rings and high-coercivity NdFeB with curved grain orientation for humanoid and servo actuators, with smooth torque and qualification data ready for joint-motor programs.
Mainrich reviews geometry, tolerance stack, grade, coating, magnetization, and qualification requirements before pricing.
Engineering response within 1 business day. Pricing within 2 business days.
Curved grain orientation creates alternating N-S poles and naturally sinusoidal surface flux for smooth torque with minimal cogging.
| Inside diameter | ID tolerance +/-0.02mm |
|---|---|
| Outside diameter | OD +/-0.05mm |
| Axis alignment | concentricity <=0.02mm |
| Face geometry | perpendicularity <=0.03mm |
| Flux uniformity | ring-to-ring surface flux variance <1% |
| Magnetization options | Poles: 2 / 4 / 8 / 10 / 12 |
| Surface gauss | +30% surface gauss vs segmented tile assemblies |
| Flux inspection | 100% post-magnetization flux mapping with serial-number traceability |
A single-piece radial ring eliminates tile gaps while tying magnetic output to one traceable qualification record. Review the complete radial multipole ring architecture. For the joint-by-joint selection path, review the humanoid joint-actuator magnet requirements.
Some motor programs need lower eddy-current heating or a more flexible rotor architecture. Mainrich applies the same drawing review, magnetic inspection, and traceability to both assembly paths.
Thin insulated layers suppress eddy-current heating for high-RPM motors, vacuums, and compact power-dense drives. Insulated magnet laminations are bonded into a controlled stack.
Matched arc segments are bonded into a rotor ring, with optional sleeve retention. Use this route when size range, tooling flexibility, or lower initial investment is the deciding factor.
Compare the complete N30 to N58 NdFeB grade range, review finished magnet assembly capabilities, or send Mainrich a motor drawing.
Sintered NdFeB grades from N30 to N58, with targeted GBD processing for higher-temperature joint-motor envelopes that puts heavy rare earth at the grain boundary, not throughout the bulk.
Mainrich connects mechanical tolerances, magnetization, inspection, and PPAP evidence in one accountable qualification path.
For rotor architectures that benefit from final magnetization after mechanical stack-up, tolerances are engineered once through DFM review.
Network test-lab measurements link each ring's flux map and serial number to its qualification record.
PPAP Level 3 supports dimensional, process, and magnetic release; automotive IATF 16949 work runs through the network's certified plant.
One Mainrich team connects engineering review, production routing, inspection, and export coordination.
Mainrich is the engineering and sourcing partner across a four-site production network Mainrich holds equity stakes in. Programs are routed by process, tolerance, certification, and export requirement.
One DFM review connects tolerances, assembly, and magnetic quality.
Automotive IATF 16949 work runs through the network's certified plant, with PPAP Level 3 support.
In-house MOFCOM licensing for Dy/Tb-bearing high-coercivity grades.
Longer if MOFCOM licensing applies.
Qualification pressure is arriving in parallel. Mid-volume humanoid programs are ramping alongside EV traction and wind direct-drive demand for the same NdPr supply. Mainrich connects qualification, allocation, and export handling.
Send the current revision and target operating conditions, even while the envelope is moving.
Yes. Prototype lead time is ~2 to 3 weeks, with production at ~4 weeks. Include annual volume so DFM carries into production.
Mainrich handles MOFCOM licensing for Dy/Tb-bearing high-coercivity grades. Lead time is longer if licensing applies.
Send ID, OD, length or thickness, pole count, working temperature, coating, target flux, prototype quantity, annual volume, and a drawing if available.
An engineer responds within 1 business day. Pricing within 2 business days.