This geared fidget toy is perfect for those boring lectures or office hours. The parts are printed in place and no assembly is required. When the gears are rotated both gears will move along the threaded shaft, it will never fall off the shaft as the threads have a limit to prevent further rotation at the ends.
All parts have a 0.5mm clearance between them.
Do not use any brims for surface adhesion as it will fuse the gears to the shaft.
Try to print with slower settings to prevent the shaft from falling over.