RotaVac - A Rotary Vacuum Pump

RotaVac is an experimental "centrifugal compressor", designed to be printable as a single piece and spun in a drill or machine to generate a negative pressure gradient.

RotaVac is designed to fit a standard 608 bearing like the sort used in Makerbots, so that a small nozzle (printed separately?) can be fitted through the bearing interior.

This is a pure experiment, and I'll post more when I have a chance to test it!