Today at work i had a job that's need to be almost accurate as a machine shop job, some holes in small steel pieces, even if my measuring, scriber, and center punch skills are good enough, when it come to the press drill work bench and allign with the 5/16 Dia twist drills was a bit harder, i made a jig that i fixed hard on the table under the drills, but i had to change my set up 2 or 3 times to be right in the center.
After couple of time i had an idea, i have a carbide scriber that the point as been machined like a pencil, i put the scriber in the chuck (as if i want to put a drill) tight the chuck and allign with it, its works great, now i found a starrett tool which i think its made for that but im not sure!
so how should i use this tool,and why its look like a mobile parts ? the center parts look like moving and i don't understand why???