the Transmission Thing
thingiverse
This transmission thing was used to create a YouTube video illustrating the basic principle behind a constant-mesh manual transmission. It is a fully functional 4-speed plus reverse gear box. All are welcome to it. I did not model synchronizers; I intend to create them as a standalone thing in the future. Assembly instructions, a parts list, and printing notes are provided in Assembly.pdf. STEP files are included for the handful of prints that the modeler may want to tweak for optimal performance. These are generally cylindrical prints with important clearances that your printer may produce differently than mine. It is a large undertaking - 72 prints requiring roughly 155 hours of print time with my CR-10. It's not the right project for a beginner or folks with actual lives.
With this file you will be able to print the Transmission Thing 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 the Transmission Thing.