Below are some of the tools I have made. Click on the pictures for larger images. Most of my cutting tools are made from oil hardened drill rod which is available at a Fastenal store. I will sometimes make a prototype out of a grade 8 bolt. Information on using oil hardened drill rod is available at http://www.woodcentral.com/russ/russ10.shtml
Revised and Improved Steel Snake
This is the last revision for the rig. The piece on the lathe is the top photo in the hollow forms. I shortened the middle arm to allow a little more freedom of movement and to relieve some of the leverage. Also made a 1 inch diameter boring bar and a 2 post tool rest with a 1 inch diameter bar. Both of these additions cut down on the vibrations while hollowing. I will I am sure make more changes as time goes along.
Articulated Hollowing Rig Version 4
This is my version of Capt Eddies Steel Snake. The rig was built using Bill Bolen and Fred Morton designs with several adaptations of my own. This is Capt Eddies site with the informaiton. http://www.bayouwoodturners.com/december2007/steelsnake.pdf Bill and Fred's versions can be found on sawmillcreek. More information on my version can be found on familywoodworking found here. http://familywoodworking.org/forums/showthread.php?t=9914
Hollowing Rig Version 2
This is my second version hollowing rig. It is a little beefier and longer as well
Hollowing Rig Version 3
My third version hollowing rig includes a capturing D-handle as well. This tool is based on a plan on http://www.woodturningonline.com/ articles - make your own hollowing tools.