Ok, I see what you mean now. That's very interesting. I was wondering what others thought about the torsion beam idea in general and if anyone else had built one what their experiences/impressions were. My shop is inside of a customized old semi trailer, so there is no foundation footings and a wooden floor. I thought maybe the torsion beam concept might be appropriate for my application if it works well on ships.

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On October 3, 2017 9:09:24 PM bari <bari00...@gmail.com> wrote:

My point was more on the shape and arrangement of the beam/s when using
epoxy granite with metal tubes and beams than epoxy granite and its
formulation.

-Bari

On 10/03/2017 09:03 PM, John Bald wrote:
Isn't that the same thing as the epoxy-granite used for machine tools
I mentioned in my original post, or is this something different?

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On October 3, 2017 8:51:17 PM bari <bari00...@gmail.com> wrote:

Check out chapters 4 and 5 if you'd like to see how to add dampening to
a beam with polymer concrete/granite.

Principles of rapid machine design
https://dspace.mit.edu/bitstream/handle/1721.1/88839/45993343-MIT.pdf?sequence=2


-Bari

On 10/03/2017 08:32 PM, John Bald wrote:
Has anyone built or familiar with the "spanning beam" or "torsional"
beam lathe stand?

users.tpg.com.au/agnet/cq9325rev4.html

Some youtube videos about them too. Idea is based on methods used for
lathes on ships. I wonder if one could fill the square tubing with
epoxy-granite for added dampening and torsional resistance? Would be
darn heavy to assemble though



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