The skew chisel is probably the single most versatile spindle turning tool at the woodturner's disposal. In fact, nowadays, I find myself relying on skew chisels for the vast majority of my spindle turning work from roughing cuts - reducing a square block to a cylinder - through subtle concave and convex curves all the way through the finest detail in the most delicate finial. As an added bonus, staying with one or two implements throughout the project saves time that would be otherwise spent reaching for - and having to sharpen - multiple tools.
No, the skew is not for bowl turning or hollowing-out a vase. There are other tools for those tasks. But used for its intended purpose, the skew rewards the turner with flexibility and control difficult to achieve with any other spindle turning tool.
No, the skew is not for bowl turning or hollowing-out a vase. There are other tools for those tasks. But used for its intended purpose, the skew rewards the turner with flexibility and control difficult to achieve with any other spindle turning tool.

What makes the skew so intriquing is that it is capable of so many different cuts. Although each cut requires slightly different skills, if we take each cut individually, mastery is not difficult. I have had beginning pen turners performing near perfect roughing and scraping cuts in a matter of minutes. I just don't tell them that the skew is supposed to be difficult. I simply show them how to position the tool and they take it from there.
For those interested, Alan Lacer's videos are a good place to start - that is: until I get my own out there ;-)