Micro Magnet Design Notes for Engineering RFQs
A micro magnet is specified by the field it must provide inside a small assembly, not by its size alone. Finished dimensions, orientation, coating and the position of the mating component all affect the result. A short drawing with these details is more useful for quoting than a request for the “strongest” grade.
What should a micro magnet drawing show?
Mark the finished dimensions and critical tolerances, datum surfaces, edge condition, pole faces and magnetization direction. For rings, include inner and outer diameter and thickness. For sensor applications, add the sensor position, working gap and required field or switching threshold. Note whether the dimensions are before or after coating.
Which material should you start with?
NdFeB is a common choice where a strong field is needed in limited space. SmCo may be considered when temperature stability or the operating environment calls for it. The final grade and coating should be reviewed against the actual working temperature, field requirement and assembly geometry. See our custom NdFeB and custom SmCo pages for the material options.
How should the first sample be checked?
Inspection should match the drawing: critical finished dimensions, coating condition, polarity, magnetization direction and the magnetic measurement at a specified location. If the magnet is installed in a holder or sensor assembly, test the assembled gap as well as the loose magnet. The first article inspection checklist gives a starting point.
How do MOQ and lead time work?
Minimum order, sampling and lead time depend on geometry, material, quantity and inspection requirements. Share the target quantity and drawing so Magnetstek can review feasibility and quote the specific part. Send a micro magnet RFQ.
