> The bottom line is that using a lead weight within the column looks like a
> no-go. Using my LMS mill measurements and #7 1/2 lead shot, assuming that
> you could fill the column side to side (neglecting the rough finish for
> minute), you could get about 2.45 pounds of lead per vertical column inch.
> My column measures 18 5/8" from the top of the column to the pivot bolt at
> the bottom. Assuming 11" of vertical head movement, that leaves you 7 5/8"
> inches of vertical room for the weight, or enough room for about 18 3/4
> pounds of lead. Even assuming a vertical head movement of only 8", you'd
> still only be talking about a weight in the neighborhood of 24 pounds. If
> you went to poured lead rather than lead shot, you'd improve that some, but
> I don't see that it would be enough to do the job.
Thanks for the hard data Rob! I suppose that I was seduced by the five
feet of ~3" ID column on my Sears drill press! But still if you wanted
to go to the under the table counterweight you could run the tension
cable down through the column. In fact by casting in a conduit for the
cable you could pour a filler into the column and still include the
conduit! OTOH you might be able to source some DU (Depleted Uranium) and
that would be dense enough to do the job! Be sure to wear a good mask
while machining it! ;<O Bill in Boulder
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