Eccentric Chuck


Overview


Historical Eccentric Chuck

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 below on the left could also be inclined as shown, making it also an oblique chuck.

Barbara Dill is an artist and woodturner who makes many great pieces using multi-axis turning. Whilst she does not use an ornamental lathe, her works can be great inspiration for the ornamental turner.

Some modern eccentric chucks designed for higher speed lathes include the ones shown below, but they can certainly be used on a rose engine lathe.


Eccentric & Oblique Chuck
Manuel du Tourneur, Volume of Plates
plate XXXVII, figure 4'''

Image courtesy Niles Bottle Stoppers

Additional pictures of this device

Jon Magill demonstrated the eccentric chuck shown below at the 2016 AAW International Symposium in Atlanta.

Home-made Eccentric Chuck Images courtesy Jon Magill


Examples of work produced with this device


Examples of this device in use


Usage Notes


How it works


Notes on making one

  • Bill Ooms made one using Corian. This YouTube video, Eccentric Chuck, shows how he did it.

More Information

Published Articles

Books and Papers

  • John Jacob Holtzapffel's 1884 book, Turning and Mechanical Manipulation, vol. 5 - The Principles and Practice of Ornamental or Complex Turning is a great source of information.

Web Sites

Presentations

Other

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About this Site

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.