This will be the center post of a small table project idea I have. Left and right threads, 45 degrees, walnut, on my radial axis.
I've ordered a side cutting V bit that hopefully will cut the inner threads of the nuts. I'll post the final project if it actually works out.
Took some brain scraping thoughts to get the toolpaths made. Used the rounding gadget in Aspire to turn a 1.5" square block into a .15"d cylinder. Had to play with the feed speed to get a good spiraling cut with the V-bit. Some harmonic vibration as the bit got closer to the center which I dampened with my hand under it as it slowly spun.
4D