This is a design for a 6.7" diameter Drum Motor (BLDC) stator mold. It represents an effective alternative to silicone steel or metglas/ceramic type stators for the home inventor/builder. Follow the same directions as posted for this Thing: https://www.thingiverse.com/thing:2423846.
This particular design is for a outrunner instead of a inrunner. This is a smaller design. Your stator should come out to an inch thick. All other details for a completed motor is up to you. Printing with 1.2mm walls, .8mm top and bottom layers, 30% infill, and .2mm layers should give you parts that can be reused. Good Luck and Have Fun!
Disclaimer: No formal scientific test have been performed. Operate and experiment at your own risk. Failure of parts spinning at high speed can cause damage to property, Injury, or even death.
Materials List: You will need a piece of board (9" X 9") to mount this project to, 6-32 X 1" bolts to mount to board, masking tape to coat inside areas, release agent to lightly coat over masking tape (I use Vaseline petroleum jelly), tipped applicator to apply 2-part epoxy, small funnel to fill mold with coated #8 soft steel shotshell pellets. Please look at the Youtube video's (3) that I have provided for https://www.thingiverse.com/thing:2423846 for details.
A video to explain the process for steel shot preparation and to give credit to the individual(s) who originally came up with the idea to use coated steel shot: https://www.youtube.com/watch?v=kpHEyzvc4dY
Smaller stencil parts added at 5:32 est on 06/10/2018
A simple tool added to assist with removing the stator from the mold on 06/16/2018 at 11:39 AM est. Using a vise grip or press use this tool to squeeze out the stator. Be patient and work your way around the piece moving it out a little at a time.