Servo and threaded rod gears
thingiverse
I recently sponsored a Kickstarter project for a Makesmith CNC router. It has some plastic gears that are easily misassembled, so I created some parts to make the gears be easily attached without needing to align them. (they attach to a FS90R servo and a ¼ / 20 threaded rod 7/16" nut). It should be able to adapt easily for other projects as well. Instructions Super glue a nut in the nut gear, and a screw into the servo side. align the rod with the servo and it should couple easily.
With this file you will be able to print Servo and threaded rod gears with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Servo and threaded rod gears.