A magnetic assembly needs more than a drawing of the loose magnet. Define the fit of metal or plastic parts, location and polarity, retention method, and the state in which dimensions and function are checked. Separate component requirements from assembly requirements to support a consistent result.
Define the assembly boundary and supplied parts
Identify each magnet and mating component, what is being supplied, who provides it, its revision and its finished condition. An appearance photograph alone does not define the complete scope.
Provide an assembly drawing, parts list and useful sections. Metal material, thickness and shape can affect the circuit and structure. Plastic slots, locating features, clips and wall thickness need to be reviewed with tooling and assembly conditions. These relationships should not be left to interpretation during assembly.
Tie polarity to a locating reference
Show how the magnet is placed relative to a face, hole or locating feature, and identify the final working face. With several magnets, show polarity at every position as well as each magnet’s direction.
For multipole or phase-sensitive structures, define the relationship between pole positions and structural references. Pole marks and error-proofing features have different roles. “Same direction” is not a complete instruction without a common reference across drawing, marks and samples.
| Document level | Requirements to define |
|---|---|
| Assembly drawing | Envelope, working face, references and critical assembled dimensions |
| Magnet drawing | Material, geometry, finish, direction and polarity |
| Mating components | Material, revision, finished condition and supply responsibility |
| Retention and assembly | Bonding/mechanical retention, gaps, sequence and orientation |
| Validation | Measuring state, mating object, function and acceptance conditions |
Provide the conditions for the retention method
For bonding, describe the materials, surface state, adhesive space and curing. Confirm the adhesive and process by project validation. Different plastics and finishes may need different preparation; a generic adhesive label is not evidence of suitability for every combination.
For clips, press fits or other mechanical arrangements, review assembly forces, contact locations and magnet brittleness. Thin protective layers are not impact-resistant structural members. Specify protection or cushioning where the design needs it.
Review the assembled circuit as well as loose magnets
Combining a magnet with metal can change the field environment and working-face behavior. Location, spacing and mating material affect the result. A loose-magnet field record does not automatically validate the assembly function.
Define the final working face, mating object and loading. State whether dimensions apply to loose parts or the finished assembly. If magnetization after assembly is planned, review the material, structure and process before building the assembly.
Freeze a complete revision for the next validation
Check that the parts list, component drawings, assembly drawing and polarity diagram describe the same revision. For example, a changed housing depth can alter pole-face spacing even when the magnet is unchanged. This is a design-change illustration, not a project result.
Begin an inquiry with the available assembly and function, then list unsettled retention, parameters and validation as open points. Reviewing the complete system supports clearer sample, pilot and delivery decisions.