Prepare the actual opening before installing the entry
- Panel cutoutThis term
The finished opening must match the mounting geometry. Verify size, shape, wall thickness and space for the sealing face.
- Knockout
The removable panel section creates an opening after preparation. Confirm the resulting edge, diameter and enclosure limits.
- Chamfer
A bevel removes the sharp edge or provides a lead-in. Its presence does not substitute for the specified seating land or sealing surface.
- Burr / swarf
A burr remains on an edge; swarf is detached machining debris. Both can damage seals or contaminate the assembly.
The opening outline, knockout removal, lead-in chamfer and edge debris influence fit and sealing. Inspect the finished hole rather than relying on its nominal size alone.
Conceptual hole preparation, not fabrication instructions or dimensions. The required opening, edge finish and wall thickness come from the selected entry and enclosure.