Test a punch first for repeated circular gasket holes when a suitable punch diameter and material support are available. Test a knife path for slots, changing diameters and irregular openings. Select the method that meets the drawing after the part is released from the table and the waste is removed.
Compare the hole and its surrounding material
A punch forms a hole with one tool geometry. Confirm available diameters, how the slug is ejected and how the punch supports the material. A knife follows a contour, so the start and end of the path, blade width and movement around a small radius all affect the finished opening. Soft stock can shift or recover after either process. Include the material grade, thickness and liner in the comparison.
| Test feature | What to record | Why it matters |
|---|---|---|
| Smallest round hole | Diameter in two directions and edge condition | A fast cut can still leave an oval or ragged hole |
| Hole near an edge | Hole center and remaining sealing land | A sound hole can leave an unusable narrow strip |
| Dense pattern | Plug removal, missed holes and cycle time | Handling and cleaning affect real output |
Use the same drawing for both samples
Place each trial feature in the same material lot and orientation. Include the smallest hole and the closest pair of holes from production. Measure after the part rests flat with the same support and instrument for both methods. Check fit with the intended pin or mating part where appropriate. Count pieces ready to pack, including time to clear slugs and reject defects. Keep each result tied to the actual tool and setup.
Frequently asked questions
Is there a universal minimum gasket hole diameter?
Use the smallest hole demonstrated on your stock at the required tolerance. Sheet behavior, available tooling and the nearby geometry all affect the result.
Can the outline and holes run in one setup?
That depends on the head and job sequencing. Send the hole schedule and sealing-land limits to JEKE and request a full part test with all operations included.
Plan a sample trial with JEKE
Contact JEKE with the trial details above. Explore the digital cutting machine range and check the material application overview for context.
Related guide: Rubber Gasket Cutting Machine: How to Choose the Right Knife Cutting System.
