A retention tab is a small intentional gap in a cutting path. It leaves a bridge attaching the part to the surrounding sheet, so it can be removed later.
When are tabs useful?
- Small parts supplied together in a sheet.
- Construction kits whose parts should stay together in transport.
- Numbered sets where loose parts could be lost.
- A sheet used as a temporary carrier for handling or storage.
Tabs are unnecessary when parts should come fully cut out and ready to use.
Choose a suitable position
Use an accessible edge where the remaining mark will not matter. Avoid fragile details, visible faces and precise mating edges. Larger parts may need several tabs.
Test the tab in your material
The bridge must survive processing and transport while allowing removal without damage. Material, thickness and part size affect that balance. Brittle materials can crack when a part is snapped free.
Allow for finishing
A small nub can remain after removal. Depending on the material, it may need careful trimming, filing or sanding. Decide whether that finishing suits the product.
Check the file
Inspect the intentional gaps after upload and confirm the remaining contour is recognised. This differs from an accidental opening in a path that should be closed.