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| Jere:
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. Closeup: Thanks for looking, Jere |
| bogstandard:
Jere, A big welcome, and very nice work. I hope you show a little more of what you get up to. I do some hand graving when I want to get a shape that is not normally available, not in your sizes, something a little larger. But anything you can show us would be most welcome. Bogs |
| dsquire:
Jere Great job on those pieces. Its hard to realize how small they are until you compare them to the size of the stone. I have seen similar jigs used to sharpen wood chisels and plane blades. :ddb: :ddb: Thanks for showing us these items. Cheers :beer: Don |
| Bernd:
--- Quote from: Jere on October 31, 2009, 05:12:50 AM ---I Thought I would post a few photos of tonight's project. --- End quote --- Very nice jig. As Don said it reminds him of a chisel sharping jig, so true. Always wanted to try hand graving too. You might be just the insperation I need. --- Quote ---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. Jere --- End quote --- A couple of weeks ago I was going through some of my older metal working magazines and came across just that subject. I'll see if I can find it again. Give me a :poke: if you don't hear back from me in a while. Bernd |
| Bernd:
Jere, I found the info. Scanned it for you. Can't post it on a public forum since it's copy righted. PM me your e-mail address and I'll send it to you. Tried at your web site but can't attach pictures there. Bernd |
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