Surface-mounted, interior permanent magnet, bonded and spoke-type rotor assemblies. Magnetically oriented, dynamically balanced, sleeve-retained, ready for motor integration. Flux mapped against your air-gap target.
Magnet arcs bonded to the rotor surface with sleeve or band retention. High air-gap flux density, common in servo motors and high-speed applications.
Magnets embedded inside the rotor lamination. Improved saliency for reluctance torque, robust for high-speed operation, common in EV traction.
Compression-bonded or injection-molded magnet rings on a steel hub. Lower cost, complex shapes, lower flux density than sintered.
Concentrated flux architecture. Very high air-gap flux density, used in high-torque-density applications.
Representative rotor assemblies showing retention method, magnet layout and shaft interface.
Carbon-fibre sleeved for high rotational speed
Segmented magnets assembled onto a shaft
Bonded magnet ring carried on a steel hub
Every rotor is flux-mapped using a Hall-sensor array to verify air-gap flux density and harmonic content. Dynamic balance and concentricity data are signed off against your drawing before shipment.
A visual record of magnetic material and assembly manufacturing, inspection and packing.
Manufacturing 
Manufacturing 
Manufacturing 
Manufacturing 
Inspection 
Packing A rotor is a dynamic system, not a collection of magnet parts. Magnet grade, air gap, retention, shaft interface, balance and thermal growth must be designed as one release package.
A drawing alone may not define the magnetic requirement. These inputs help us recommend the right grade, geometry, coating and inspection plan instead of quoting a generic part.
Share speed, torque, power, duty cycle, temperature at the rotor and the electrical operating point. Include overspeed and fault cases.
Provide shaft datum, bearing arrangement, rotor OD, stack length, runout, fit, key or spline details and assembly sequence.
Provide pole count, magnetizing direction, air gap, flux or back-EMF target, harmonic limits and grade preference if known.
State sleeve, band, adhesive, pocket, bridge or overmold concept, plus burst-speed, shock, balance and service-life requirements.
Inspection scope should follow the failure mode. We can align the report format, sample quantity and release criteria during drawing review.
Define balance grade, correction plane, speed, fixture and residual unbalance limits. Report the condition of the final assembly.
Validate the agreed overspeed and thermal condition, with inspection for movement, cracks, adhesive failure or sleeve damage.
Map air-gap flux and, where applicable, verify back-EMF waveform, pole position and harmonic content against the motor target.
Measure critical diameters, shaft runout, magnet-to-shaft concentricity and bearing datum relationships on the released assembly.
The assembly scope can include magnets, shaft, hub, sleeve or band, adhesive, balancing and agreed validation. The exact make-or-buy boundary should be defined from the drawing and motor interface.
The most useful starting package combines motor duty, rotor geometry, air gap, speed and temperature with the magnetic target and retention concept.
Balance, dimensional, flux and waveform reports can be aligned to the program's acceptance plan. The required fixture, sample quantity and limits should be agreed before production.
Our engineering team can review material, operating conditions, magnetic requirements, manufacturing route and validation needs before quotation.