Answer;
I first heard of this idea from Eli Avisera and then some time after from Simon Hope. In essence the Unichaser is merely a female chaser, but sharpened both on the top and underside.
For female threads use as normal, and once the thread is struck, pull backwards with your armrest.
For male threads turn the chaser over 180 degrees and strike your thread with the handle at 45 degrees away from you, but similarly to the female thread. Once struck, then push in with your left thumb to engage the chaser in the thread and it will cut just as successfully as a conventional male chaser.
Always remember that right hand threads are cut from right to left. Conversely, left hand threads are cut from left to right. For both right and left it is best to begin them on a chamfer at the outer edge of the hole or spigot and work from right to left.
Question;
How do I use the Unichaser?
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Copyright John Berkeley 2008 last updated 7/1/10
Question;
What is the best way to store, turn and cut alternatives?
Answer;
I find it best to turn alternatives using negative rake tools, i.e scraping tools, with care at no more than around 1800 rpm.
Because it cuts best at room temperature, ideally store it all indoors and turn it as soon as it is possible, whilst not too cold. Colder temperatures make the substance more brittle and less easy to turn.
It can easily be cut, with care of course, on a normal band saw.
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