The file 'An Unusual Spring Motor 3D Printer Model' is (stl) file type, size is 33.1KB.
You can find a video about this here https://youtu.be/UjwnwwZ84RU
to finish this you will need a 1.25kg barbell weight, 2 x 22mmOD 8mmID 7mm Thick bearings (Skate bearings) 50mm of 8mm steel rod, 1 x shelf pin 6mm by 25mm, a hack saw blade (120mm of it), 4 x 8mm flat washers and something to act as a weight - I used 20mm by 3mm magnets but anything as a weight will do
Barbell_Centre.stl | 25.1KB | |
Base.stl | 40.5KB | |
Bearing_Clip.stl | 37.6KB | |
Cam.stl | 62.8KB | |
Spring_Arm.stl | 2.2KB |