X-Acto No. 1 Handle Assembly

For a freelance project, I needed to model the parts of an X-Acto No. 1 Handle so I could understand the mechanism better. I took detailed measurements with calipers and identified the main parts. Because this is an off-the-shelf product, I felt that it would be helpful to share this design in case it is useful to others. Please feel free to use for your own projects!' The assembly does not have the blade modeled. There are three parts: Handle, Collet, and Collar. The mechanism works by tightening the Collet/Collar such that the small gap in the metal Collet closes on the blade, similar to a drill chuck.