Screw as ball-point pen

Indispensable part of every day life

The ball-point pen - a writing utensil that is an indispensable part of every day life - especially at school. With some basic CNC knowledge, this ordinary device can become a personalized writing implement.

Thus, at the vocational school for handicrafts and industry in Bozen, the idea of designing an M10 hexagonal screw as a ball-point pen was born. The result was a light-weight, ergonomic writing instrument, which can be personalized with an engraving.

The goal was to give the students realistic exposure to CNC programming with the SINUMERIK controller from Siemens.


The programs and files have been created and tested with the greatest care in accordance with the requirements listed in the manufacturing description. However, the manufacturing of the workpieces offered is at your own risk. Siemens accepts no liability for damage to property or personal injury. Workpiece manufacture is only permitted for private and not industrial use. Passing on the manufactured workpieces or production documents to a third party for commercial gain is strictly prohibited.