Version 2 of a replacement spinner for 500W Chinese CNC spindle. This has better blades thanks to Andy, and it pushes rather than pulls air. This seems to keep the spindle cooler and cleaner.
I printed this in PLA after printing I used a 10mm masonry bit in reverse to clean out the shaft hole. By reverse I mean putting the cutting edge in the chuck and using the shaft to true the hole. My bit (Makita) has a 8mm shaft so its perfect for the task.