So, over the weekend was kept really busy doing some more renovation work on the wee girls house. Pulling walls and ceilings down, building new stud walls and running cabling. All the usual fun stuff.
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As there's no lighting there at the minute, and with the nights getting darker earlier, time was spent up at the workshop, doing some joystick work.
Trying to get my idea of how to safely drill a hole in a round object without causing extreme pain was first laid out in FreeCAD. This allowed me to get an idea of what it was going to look like, check tolerances, and depths of cut, before starting. Once in hand it was time to Get a list of cutting operations, and start making the bearing jig.
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Once the jig was made, it was time to test it out. I did make a small boo boo, when I didn't quite align two of the holes up properly, but wanted to at least do an initial test, and hopefully fix it without have to make the top section again.
I had the option of using ordinary steel bearing, and once drilled, harden it, or use hardened stainless steel bearings. Nice thing about stainless, is it doesn't rust, but you do need carbide drill bits to drill through it. Ended up going for the stainless steel.
So with jig in hand, or should I say, the vice, load up the ball bearing and clamp down the top half, allowing it to clamp the bearing in place. Using plenty of cutting fluid, slowly brought the carbide drill bit down and started drilling. Going too slow or fast can create excess heat, and you end up hardening the metal even more.
Once through the other side time to open it up and see the result. Quick test fit on the joystick to ensure it fits, and moves freely in the bearing housing. Still needs a bit of cleaning up, then create a few more.
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