Summary

This is a replacement knob for an old drill press. The knob includes a hexagonal recess for a 11/16-20 nut which was epoxied in. The original design was a smooth sphere, but I ended up preferring the look and feel of the triangular facets instead. This was modelled in Blender from its "isosphere" mesh object.

The part was printed with the hole downward using Cura's experimental "tree" supports. The supports popped out a minimum of effort.