I purchased and put together a Sherline CNC ready metal lathe early in this year. It was a fun project and a learning experience. This first photo is a picture of my first kitless rollerball that was made using the new lathe. All of the threading (both internal and external threads) were cut on the lathe without the use of taps or dies. The Nib is connected to the body using basically a 48 TPI single start thread. The cap to body is also 48 TPI but with 6 starts. The cap will complete twist and seat in less than 2 revolutions. I spent probably at least a week studying threads to determine how to best cut them on the lathe. It's probably not the best pen I've made, but it's the first step in a new adventure. I stayed with a pretty basic profile but have all kinds of idea for future embellishments.
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