Eccentric & Oblique Chuck Manuel du Tourneur, Volume of Plates plate XXXVII, figure 4
An Eccentric Chuck is used for holding an object off-center from the axis of rotation. On high speed lathes, great care must be taken to balance the work when running eccentrically, but, on an rose engine lathe, the rotation is significantly slower so this is not an issue. That is why home made versions are so easily made.
The eccentric chuck shown to the left could also be inclined as shown, making it somewhat like an oblique chuck.
Just getting started? You can delay getting one of these. However, they are easy to make, and are quite useful.
Jon Magill demonstrated the eccentric chuck shown below at the 2016 AAW International Symposium in Atlanta.
Jon Magill authored an article titled, "Ornamental Obsessions—Slightly Eccentric" that has more pictures and details. That article was published in the AAW's magazine, "American Woodturner" in Fall 2009, pages 60-62.
Home-made Eccentric Chuck Images courtesy Jon Magill
Disclaimer : eMail comments to me at OTBookOfKnowledge @ Gmail.com. The process of woodturning involves the use of tools, machinery and materials which could cause injury or be a health hazard unless proper precautions are taken, including the wearing of appropriate protective equipment.