How to Regrind a Punch the Right Way

This post is a 10-page visual storyboard (same format as the T-401 and Cylindrical vs. Centreless posts). Insert the matching PNG from the punch-regrinding image set using the editor's image button, then delete each placeholder line.

1. Hero

How to Regrind a Punch the Right Way

2. The Cost of Waiting Too Long

A punch that keeps running past its wear point doesn't just cut worse — it costs more in scrap, rework, and unplanned downtime than the regrind itself would have.

3. Signs of Wear

A rounded or blunted cutting edge and small chips along the land are the first visible signs a punch needs attention.

4. Inspect

Check the cutting edge under a loupe or with precision calipers before deciding how much material needs to come off.

5. Punch Anatomy

Knowing the land, the relief, and the cutting edge by name makes it easier to describe exactly what's worn and what a regrind needs to restore.

6. Clean

Deburr and clean the punch by hand before it goes anywhere near the wheel — debris on the surface throws off both the grind and the inspection after it.

7. Regrind

Light, controlled passes on a tool and cutter grinder restore the cutting edge without overheating the material or changing the punch's geometry.

8. Verify

Check land width and squareness with a precision gauge or calipers before the punch goes back into service.

9. Regrind Checklist

A quick checklist to run through before calling any regrind finished.

10. Work With Apar

Extra Precision Universal Workhead Fixture · T-401 Tool & Cutter Grinding Machine · T-600 Tool & Cutter Grinding Machine