Here are some items you will need to build the lathe:
(Clicking on a picture below will take you to the Amazon page where you can purchase the product. I do not sell these items myself, but if you start with the link on this page, anything you buy helps support the YouTube channel).
You could use this one, but I recommend you measure the distance between the motor and your lathe center before deciding on a belt size. It depends on your motor setup. Your Pulleys can be purchased or made of wood. The sizes vary depending on your motor speed so I don’t want to recommend a specific one.
These items would also be helpful but are not required to build the lathe:
Morse Taper Adapter