Mini centrifugal compressor

An earleir version of miniature centrifugal compressor for demonstration purposes. It uses small dc collector motor with 2mm shaft - RC500-18280. Impeller has 6x3 ball bearings at top side. Collector has housing for correspomding 3mm axle. Be carefull when installing impeller om motor shaft - its quite unhandy to remove it. Added later version (v2) with improved performance. Changed hole for motor to square shape due to centration issues. Square hole impeller seems to have less failure prints. Added holes on back case to remove impeller out of motor shaft. Version are not interchangeable. Working on version for R280 motor with higher rotation speed. ATTENTION: collector stl has to be mirrored)) (thats why its usefull to read disclaimer))) If you are having impeller/collector contact issues, use 0.5mm spacer model to solve it. Assembly has tight tollerances of about 0.2mm - precision printing required: 0.2-0.3 nozzle <=0.1mm layer. It's better to split collector to remove supports easier.