Particularly given some people have been asking about hammer handpieces, there's some suggestions here on modifying automatic centre punches to stand-in for the job -
http://mjsa.org/publicationsmedia/mj...ooling_around/
Whether it's a good idea or not I'm less sure - but if it works, it works.
I'll stick with my micromotor handpiece though... My Starrett centre punch is for steel.
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