This is a guide on how to build a reasonably accurate jig for drilling a hole in a sphere with a hand drill. Following this step by step is very important to get successful results. There are basic measurement skills involved. The more accurate the measurement combined with the ability to match that measurement to the proper tool, the more successful your results will be. There is probably room for improvement to this technique.

Step 1: Parts & tool list

•bolts(2), washers(2 or 4) & nuts(2)
•drill bit
•hole saw or spade bit that corresponds to the size of the ball
<p>Great idea</p>
Hehe, last picture reminds me of the NeverSoft logo. http://upload.wikimedia.org/wikipedia/en/7/77/Neversoft_Logo.png
Neversoft!! <br>Nice tut :)
Very interesting, thanks for sharing.
What if, instead of the sphere being placed in a hole of similar diameter, it was placed between two pieces of wood with a hole diameter smaller than the sphere. This would allow the sphere to be clamped in place between the center plates while still using the outer wood plates as a drilling guide. This would also allow you to accommodate spheres of several sizes with the same jig. Alignment of the two halves might become a problem if your bolt holes began to wear however.
The rest of the story is that I have access to a drill press but it was the middle of the night and I didn't want to wait until morning to continue with my project.
Nice! As an amateur wood worker with a minimum of tools I am happy to see such kind of solutions. I use a drill press a lot but still to make a hole to a sphere would require a similar alignment procedure, with only one base plate instead of 4.
Sure, glad you found it useful!
excellent! thanks!!! <br>

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Bio: A combination of paradoxes, I love to create useless stuff of novelty. The less functional a project is, the more I'm interested in it ... More »
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