Why would you need to find the center of an already drilled hole? You ask. What would be the point of that?
Well, let’s say you’ve drilled a hole in a piece of wood. Next, assume your initial hole drilled was a ¾” diameter hole. Now, assume the hole-diameter should have been 1-1/2”, for whatever reason. And, let’s also assume that the 1-1/2” diameter hole needs to be centered on the ¾” diameter hole already drilled. A whole lot of assuming going on here. That’s why you need to know how to find the center of an already drilled hole.
The ¾” dia. drilled hole is shown in the following Photo. This is just a scrap piece of wood. It’s a visual aid; I like visual aids.
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