A connector bevel is a three-dimensional machined feature. Its angle alone does not define the remaining edge or its relationship to copper. Put the required geometry into an inspectable drawing so machining and incoming inspection evaluate the same construction.
Start with the mating interface
Use the connector’s board requirements and the PCB drawing together. Identify the entering edge, board thickness, bevelled sides and extent along the edge. Confirm which edge portions must remain square or unmachined.
Eurocircuits’ edge-connector guidance treats bevel geometry and inner-layer copper clearance as related requirements and distinguishes machining arrangements. Its service limits are supplier-specific, so obtain an agreement for the selected board rather than adopting them as universal rules.
Define useful dimensional references
| Feature | Inspection reference |
|---|---|
| Bevel angle | Clearly identified board surface or edge reference |
| Remaining edge | Specified residual geometry at the entering edge |
| Bevel extent | Start and stop positions along the connector |
| Copper relationship | Required clearances in the machined volume |
A side-view drawing should make the angle convention unambiguous. Two teams can quote the same number while referencing complementary surfaces unless the drawing shows which angle is intended.
Inspect after the relevant final operation
Check edge condition, exposed material and contact geometry after machining. Relate any burr or damaged finish to its actual location on the mating path. A photograph looking straight down on the board may not reveal the remaining edge shape.
For example, a bevel can look uniform from above while leaving different residual thickness along the edge. Use the agreed measurement locations and method rather than judging the entire feature from one end.
If panelization changes access to the edge, review the machining route and references again. The same finished drawing can require a different fixture or operation when the board remains attached to a customer panel.
Specify the measurement condition if the board is flexible enough to move in the gauge. Supporting the board differently during supplier and customer inspection can otherwise create a disagreement that belongs to the method rather than machining.
Connect dimensional evidence to fit
Perform the specified mating evaluation with a suitable connector sample or approved gauge. A successful insertion is useful functional evidence, but it does not replace copper-clearance or surface-condition requirements that may not be visible during mating.
Keep any approved deviation explicit. Do not silently increase machining to solve insertion resistance without checking the resulting contact and internal copper geometry.
The plating-bus removal guide covers another edge operation, while selective-finish boundaries define the contact surface that must remain after manufacturing.
Move from reading to a build-ready project
Use the fabrication and assembly checklists to prepare drawings, production files and test requirements.
Open the DFM checklist