Reply by LeeMills

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Posted on Rough finish off the tool

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675 posts in 1750 days

#1 posted 09-15-2018 08:47 PM

These may or may not be part of the problem.
First, what type chuck and are the jaws installed properly. There should be a shoulder at the top for the jaws to seat against. They are open much too wide. They may be the wrong type jaws (bowl vs spigot) for an item extended that far out.
The roughness appears to be from scraping not cutting. The tool can be razor sharp and still used in a scraping position.
The ridges appear to go all the way around. The first culprit may be moving your arms rather than using your body to make the cut (stance). The second culprit may be your feed rate; you will always get ridges but the goal is to have them so small you can’t see them. This is corrected by lathe speed and tool feed rate.

Stuart Batty has an excellent series videos on fundamentals.
In particular he has three on stance and three on chucks, tenons, and recesses. He also has one on feed rate but I am not sure what the called it. They are all about 10-15 minutes.

-- We cannot solve our problems with the same thinking we used when we created them. Albert Einstein

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