Bushing, chamfered, flanged, tapered, customizable and parametric,

Bushings are useful for adapting shafts and holes.  With the chamfer and flange options, the bushing can fit in holes with eased corners, and can support itself in a drilled hole.

The taper options make the bushing into reducer or cone.    Pasting a couple bushings together can adapt different sized shafts.

The adapter0p625_poleTaper is a combination of two bushings, used to mount a 5/8" threaded shaft on a taper-ended rake-handle for holding a GPS antenna.  A plain 5/8" bushing to match the threaded shaft was combined with a bushing tapered to match the rake-handle-end.    Multiple bushings could be assembled together in OpenSCAD or within PrusaSlicer.