We’re improving our dust-control. This sees us connecting the various machines up to a central dust and chip separator and vac-shop.
But we needed some sort of valves; so we do not waste precious flow capacity on machines that are not in use. Unfortunately the PVC ball valves we got where very stiff (especially when cold). And it would not be long before the handles would break.
We tried lubing them – to no avail.
Ultimately we broke out one of the largest tools we have at the makerspace; the abene mill.
That worked !