Machining a bolt from round stock was an important step in developing both my lathe and milling skills. This project built on foundational machining techniques while introducing more precise operations such as single-point threading and multi-machine workflow.

I began with 1-3/8" 12L14 round stock and used the engine lathe to turn the material down to its rough dimensions, establishing the main body of the bolt. After achieving the correct diameter, I cut a relief at the end of the soon to be threaded section to allow for proper thread termination and tool clearance. From there, I used a 60 degree threading tool to cut the external threads, ensuring consistency and proper fit.

Once the turning and threading operations were complete, I transitioned to the knee mill to machine the hex head. This involved indexing and carefully removing material to create the six flat faces required for a standard bolt head, maintaining symmetry and dimensional accuracy throughout the process.

This project reinforced my understanding of machining workflows across multiple machines, as well as the importance of sequencing operations correctly. It also highlighted the level of precision required to produce functional threaded components that meet both dimensional and practical requirements.

Below are some pictures of my project in different stages of completion. The first image on the left is the bolt being roughed into shape on the engine lathe. The second, or middle picture is showing me cutting the threads using a single point method. The last picture on the right is the finished bolt, using my nut for fitment verification. Feel free to click on the images for a better view.