So you have two holes and you need to transfer the dimensions to another workpiece. This comes in handy when transfer punches are not able to be used.

Step 1: Measure Hole Sizes.

Now take your vernier calipers and measure both hole sizes. Even if hole was drilled with a certian size bit chances are it is oversized. These holes were drilled with a 3/8" bit. The holes are .378" each....

Step 2: Measure Inside Dimension

So mease the shorest distance between the holes. Mine measures 2.622". Now take one hole measurement and add to distance measurement. Mine will look as such2.622 + .378 = 3My first measurment equals 3" holes center distance.

Step 3: Double Check!!

So if you would like to make double sure.....measure the outside distance between your two holes. Mine is 3.378" . Now take one hole measurement and subtract from total distance. Should look as such3.378 - .378 = 3Again I got a distance of 3"

Step 4: Conclusion

Now you know the handy fast way of measuring between two holes. Hope this helps with future metalworking projects. Enjoy and be safe in your shop!!!
<p>Given that the holes are the same size I always measure from the distance from one whole hole to the start of the other (red). Measure on the inside of the hole. See picture. That way you get a center reading, without the added calculus (black).</p>
<p>Me too, but Carl Blum has a clever method where the holes size does not matter.</p>
this stuff right here
<p>Oh, and if a center punch cannot be used: Spin a same size drill as the original hole a couple of turns with the <br>original piece up top. That way you get a small indent that you can use <br>as a center for your smaller drills. That way you won't even need to measure.</p>
that is also a good method. thanks for sharing! always nice to have a couple of different ways to do stuff for sure
<p>Useful tip.</p>
Hi: I did this all the time at work reverse engineering parts. I would take the inside difference and add it to the outside difference then divide by 2. Then the hole sizes don't matter. Carl.
<p>Yes, your method is better. Thanks for sharing.</p>

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Bio: I am the co-director, co-founder and lead instructor for the Customs for Urban Teens Program (CUT Program). Started in 2009 we take at risk youth ... More »
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