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THREE FACET PRICKPUNCH

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DavidA:
The following may be helpful here.



Dave.

velocette:
Hi
One thing I was taught in the distant past was to file off flush with the surface was to use a thin warding file remove the burrs

Eric

Imagineering:

If you do this to a piece of Carbide and make the angle steeper, it works as a perfectly good engraving Tool in a CNC Setup.

Pakrattuk:
I remember hearing from a jeweller friend who was working with stainless steel at the time that a 3 sided centre punch like the one shown, was ideal for stainless steel as the sides produced by the punch gave the drill something to bite into as opposed to a round punch mark which could often lead to the drill spinning and work hardening the stainless, I've used this type of punch anytime i'm drilling stainless steel and rarely have any problems

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