Imagine what would happen if gravity would work in the other direction… 😉
Thanks for the explanation. And yes, the pulling force of normal end mills is known. Less in mills with straight cutting edges, and there are even end mills with a thread that pushes the chippings downwards.
BTW, I made the coupler, the nutlock, and the IE universal tool mount from PETG – that’s another class of definition, hardness (yet elastic) and impact resistance, compared to PLA.