Hobber powered by hand drill

thingiverse

Simple design easily printable, allowing all three parts to be produced in a single run of 3,608 bearings, including bold and tap, as needed. The concept is to partially tap the small cylinder with your chosen tap, then carefully push the same cylinder into place within the bearing. This motion enables you to bring the side of the tap into direct contact with the bolt supported by two bearings and secured by a bolt along with any required length spacers necessary to reach the desired location for hobbing. Gently apply smooth pressure while also assisting the bolt's rotation, if needed. As you drill and cut, maintain gentle yet firm pressure until achieving your desired depth of cut. For multiple bolts, simply repeat this process quickly and accurately, producing results in no time. Although I haven't yet had the chance to print or test this particular design myself, utilizing a lathe as my go-to tool for hobbing, I'm happy to offer this alternative solution to individuals working with only a drill at home.