New Zealander Lance Abernathy, a maintenance engineer, enjoys a good challenge in creation. He recently took on the design challenge of making what might just be the world's smallest working drill. Abernathy designed the small piece using Onshape 3D CAD software and printed it using his Ulimaker 2. With a 0.25mm nozzle and using a 0.04mm layer height, the three pieces took about 25 minutes to print. Assembling it took longer, due to the small and condensed parts inside -- the drill has a hearing aid battery, button, and a miniature motor, with wiring made from a stripped headphone cable. While this drill is already very small, at 17 x 7.5 x 13 mm, Abernathy wants to make a smaller drill next. Read about his process in the full article:

Below is a photo of Abernathy's small drill: