Ever want to drill out a pool ball for a paintball pump, shift knob, or door pull? Maybe just a really cool and tactically sound walking stick. We do custom laser engraved shift knobs (as seen in the first photo) and needed a repeatable way to drill out the balls for them.
Clamping down in a vice on a sphere is pretty difficult, especially when yo are trying to keep a surface finish correct. Being able to index is even more crucial, so repeated operations can happen, which is not always possible when you are wrapping things in rags and scraps of leather.
What you will need:
A block of Sculpy modeling clay
Milling is optional.
Techshop is optional, but a big help. I did this at Techshop Pittsburgh
I first got the idea from a fellow on mcarterbrown.com
Step 1: Prep Your Sculpy
Step 2: Wax Time!
Step 3: Prep the Vice
Step 4: Molding
Sculpy is good for this, being that it stays just a bit plasticy once cured. I havent had a ball slip yet.
remember, we want a bit of clay to fit over the top, and we want to keep both halves of the jig from closing in. You may want to use a bit of tape or a bit of wax in order to keep them apart, I didnt have an issue with this.
Step 5: Remove the Mold, and Bake!
Follow the instructions on the box. I baked mine for about an hour to be sure.
Step 6: Thats It
Good luck, and I hope this was useful!