Q: What does the cap on this punch do?
Starrett automatic center punches have a cap that adjusts the force of the blow the punch delivers, so you can vary the strike from light to firm depending on the material.
30N2820 - 4" Automatic Center Punch
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These punches have caps for adjusting the force of the blow applied by the punch. All working parts are made from hardened tool steel, and each punch has points that are removable for sharpening or replacement.
The 4" punch is 3/8" in diameter; the 5" punch is 1/2" in diameter. Each has a knurled steel body and cap. The hinge-locating punch has a sprung bevelled sleeve that centers the punch point before it is struck. It is 9/16" in diameter, with a knurled aluminum body and cap.
Starrett automatic center punches have a cap that adjusts the force of the blow the punch delivers, so you can vary the strike from light to firm depending on the material.
Yes, the points are removable, so you can sharpen or replace them without buying a new punch body.
The 4" punch has a 3/8" diameter body while the 5" punch is 1/2" in diameter; choose the larger size if you want more heft and a firmer grip for heavier marking work.
It has a sprung, bevelled sleeve that centers the punch point on the workpiece before it's struck, which is useful for centering hinge screw holes accurately.
| Materials | Hardened tool steel points; knurled steel body (4"/5" punches); knurled aluminum body (hinge-locating punch) |
| Dimensions | 4" overall length (3/8" dia.); 5" overall length (1/2" dia.); hinge-locating punch: 9/16" dia. |
| Includes | Center punch |
| Package Quantity | 1 item |
| Warranty | Lee Valley Satisfaction Guarantee |
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Starrett Automatic Center Punches
These punches have caps for adjusting the force of the blow applied by the punch. All working parts are made from hardened tool steel, and each punch has points that are removable for sharpening or replacement.
The 4" punch is 3/8" in diameter; the 5" punch is 1/2" in diameter. Each has a knurled steel body and cap. The hinge-locating punch has a sprung bevelled sleeve that centers the punch point before it is struck. It is 9/16" in diameter, with a knurled aluminum body and cap.