Sorby Hollowing Tool Cutter - should it be ground with undercut?

[Mark Greenbaum]

Personally, I use the small cutter that Bruce showed for roughing and your style cutter for finishing also. IF I hand hollow. That being said, if you're doing those deeper vessels, I'd invest in a captured or articulated rig. And that is another whole can of discussion.......

I have a thread over in the Green Monster Group: https://sawmillcreek.org/showthread....rms-on-a-mast; that shows my homemade articulated arm hollowing rig. It works, just needs some refinements.

[Mark Greenbaum]

Here's the vessel in the rough. I managed to get it semi-finished and lacquered tonight.
0313181808_Burst01_resized.jpg

[Brice Rogers]

Mark, I have a homemade clone of a Hercules. I find that if I accidentally try to cut at the 9 o'clock position (the side), that I get some twisting torque. But, if I position the tool so that I am cutting more at the tip (maybe 10:30 to 12 o'clock), there is not any twisting.

The tip that you were using looks fairly large. If you narrow the cutting surface, it will have less torque. Just a thought....