2 inch drill press knob

thingiverse

resized to 2 inches for the ball, and 13/64 hole that is 1.77" long. This was so that it would fit my old drill press. with a 13/64 hole you should be able to tap it for a 1/4-20 or 1/4-28 thread. I recommend lots of walls to make it strong and to give plenty of room for cutting the threads in. I went with 8 walls (3.2 mm thick) and 20% cubic infill.