The file 'The NIF Differential Friction Drive 3D Printer Model' is (stl) file type, size is 180.6KB.
You can find a video abut this here: https://youtu.be/Wl4hOXzGSdA
you will also need 4 or 5 table tennis balls. You might have to change the thickness of the compression washers to get it to work properly. This will change the frce acting on the balls.
Axel.stl | 62.4KB | |
Clip_x_2.stl | 18.6KB | |
Compression_Washer.stl | 25.1KB | |
Cups_x_2.stl | 85.6KB | |
Drive_Cone.stl | 81.8KB | |
handle.stl | 339.9KB |