On 2018-07-31 9:29 AM, Ed Minch wrote:
> I have a couple of those, both Starrett, and they seem to do a more useful job
on metal than an wood. Even though the pressure is adjustable, it seems all it
does is make a deeper small hole
> Ed Minch
The same is true of my No.280 Moore & Wright Automatic Centre Punch. It
leaves an excellent dimple on metal, making it easy to center a twist
bit. But on many woods the dimple's too small to be helpful, except for
creating a registration mark for a beefier, hammered centre punch with a
wider tip. The narrow tip of the automatic punch makes it easy to make a
spot-on mark, but the hammered variety creates a larger dimple which
makes for easier registration of a drill bit, particularly on softer woods.
My C$0.02
Don
--
“Error flies from mouth to mouth, from pen to pen, and to destroy it takes
ages.” Voltaire
“A great many people think they are thinking when they are merely re-arranging
their prejudices.” William James
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