I Thought I would post a few photos of tonight's project.
As an amateur watchmaker, hand-held lathe tools (gravers) are a frequently used tool.
Shown is a handmade graver from 1/2" walnut dowel, brass tubing, and a GlenSteel 3/32 HSS lathe bit. It was ground to a 50 degree cutting face.
To hone the face to a nice sharp edge, it can be done free hand on a bench stone, however this requires a very steady exacting hand.
Otherwise a jig of some sort can be used to hold the graver at its desired angle. These jigs are available commercially in various forms, but I decided to make one. The design is based on the one described in John Wilding's book titled "Tools for the clockmaker and repairer : how to make and use them." I made some modifications to his design as he works in Imperial dimensions, and uses BA threads and his is designed for use with 3/16" gravers. Aside from the dimensions, I will be following his methods and design.
It consists of a clamp, connecting arm, and roller pivot and a roller. The pivot arm is cross drilled and pinned to retain the roller.
When I made the brass thumb screw, I tried using a simple knurling tool, however, I obviously had no idea how to use it. Any advice on how to use a simple knurling tool, specifically how to determine the diameter of the work to be knurled would help I think. It is a single, checkered form wheel type that fits in the toolpost. Instead I simply ran a threading tool bit into the side of the part and indexed to 30 positions, it gave a decent knurl-like result.
Some photos of finished project.
Shown in use on an India bench stone.
Thanks for looking,