Precision magnet rotors for Hall, AMR, GMR, TMR, and angle-position sensing modules in automotive assemblies.
Automotive Magnetic Sensor Rotors is most relevant when best for sensor engineers who need a rotor that is mechanically safe and magnetically repeatable under automotive validation. Typical product programs include Throttle pedal sensors, Steering angle modules, and Brake-by-wire sensors, so the early review should confirm magnetic angle error and sensing radius control.
Before sample tooling, align on 2D/3D drawing, material target, magnetic pattern, and sensing datum and operating temperature, vibration, media exposure, and lifetime requirement. The first acceptance check is magnetic angle error (Project-defined by sensor architecture and air gap), because angle error is often the release gate for throttle, steering, and position-feedback applications.
The main risk is brittle sintered magnet carried into a vibration-critical assembly; control it by review bonded magnet material and molded geometry when chipping, cracking, or adhesive failure can affect functional safety. Also review rotor concentricity and magnetic pattern accepted without measurable criteria before moving from prototypes to repeat production.
| Metric | Typical Range | Why It Matters |
|---|---|---|
| Magnetic angle error | Project-defined by sensor architecture and air gap | Angle error is often the release gate for throttle, steering, and position-feedback applications. |
| Rotor concentricity | Defined from bore/shaft datum to sensing surface | Mechanical runout becomes magnetic signal variation when the sensor reads a rotating magnet. |
Yes. The RFQ should include pole count, magnetization direction, sensor air gap, target curve, and acceptance method so tooling and magnetization can be reviewed together.
Include 2D/3D drawing, material target, magnetic pattern, and sensing datum, operating temperature, vibration, media exposure, and lifetime requirement, and sample quantity, tooling target, annual forecast, destination, and PPAP needs. If the part is tied to automotive or safety-critical sensing, also include PPAP, traceability, and magnetic test expectations.
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Include drawing, material, pole pattern, temperature, compliance, and PPAP needs.
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