Rotary Pen Six Cylinders

thingiverse

This is a six cylinder version of my Rotary Engine Writing Utensil. The non-printed parts are six pilot pens and ink cartridges, a skateboard bearing and some tape. The pens and the bottom half of the pen casing with some tape should be inserted first. Next, use the bearing to push half of the pen cartidges back while holding the rest back with your thumb. Lastly, push the crank top on top of the bearing and attach the knob. The cavity for the pen is slightly larger than the threading of the pens, so I used duct tape to make a snug fit. I used super glue to connect the knob to the crank top and the two piece of the stand together.