Identify the direction and working face.
N and S label north and south poles. Arrows show internal magnetization from S toward N, not external field lines. Colors identify polarity and are not a measured field map.
Axial magnetization
Magnetization follows the cylinder axis; the end faces carry opposite poles. The ring is shown in an axial section.
Block magnetization axes
Three sectional views show thickness, length and width axes. Identify the dimension axis on the drawing; do not infer it from the longest or shortest side.
Diametric magnetization
Magnetization is parallel along one diameter, with poles on opposite sides. It differs from true radial magnetization with poles on inner and outer cylindrical faces.
True radial magnetization
The example has S on the inner surface and N on the outer surface, with radial magnetization. Reverse polarity may also be specified. Feasibility depends on material, size and orientation process.
Circumferential multipole pattern
Example: eight alternating poles (four pole pairs) around the outer circumference. This describes pole positions, not circumferential magnetization. Specify pole count and phase.
Planar multipole pattern
Alternating poles on one working face. ⊙ denotes magnetization toward the viewer; ⊗ denotes away. The opposite face requires the actual design.
Put polarity requirements on the drawing.
Example: magnetize through thickness t; the designated mating face is N; apply an N-face dot mark. Specify dimensions, tolerances, magnetic requirements and marking location separately. This is a notation example, not a product specification.
| Specify | Review |
|---|---|
| Direction and pole face | Identify the dimension axis, view or mating face and N/S polarity. |
| Pole count and registration | For multipole designs, specify count, pitch, reference features and phase. |
| Marking and delivery | Specify pole marking, location, magnetized/unmagnetized delivery and assembly sequence. |
Review sequence: working face → axis and polarity → pole count and registration → marking and delivery.