quick Temporary chuck key

[Frank S]

I needed to remove the jaws of a 6" 4 jaw chuck to see if it could be utilized in an application I am working on but I didn't have a small enough chuck key for it. not wanting to spend time making a chuck key if the old chuck was not going to work out I dug through my taps and found one of my 1/2 13 taps had just the right size square the others were too large. I screwed 2 nuts on the tap and lightly jammed them together, with a 3/4" box end wrench the jaws were out in a jiffy