I spent the last couple of weeks searching Ebay and Craigslist. This granite table appeared 11 miles from me. It is 36" x 48 x 8, with two ledges. The surface is 38" high (higher than I really wanted, but I will go with it). It appears to be an old grade A plate. I don't have the tools to be sure.
Attachment 188220
It ended up costing $500 + tax plus $120 to ship it to me. The price was higher than some I have seen, but it was so close that the shipping was much less. The company that sold it to me are riggers
Advanced Riggers & Millwrights About They get tables like this (and VMC's and giant mills) as cast offs when they move companies around.
The granite looks pretty good. I was bummed to discover that there are lots of really tiny divots you can feel. There are also some scratches where you can see silver or brass colored metal. I ran a test indicator over it attached to my Noga holder. The needle shivers within a range less than .0001. The scratches don't show any depth! :wee:
It has bolts for leveling... Err. No. It has one bent, rusty bolt for leveling. The other 3 legs have a rusty bolt hole.
Attachment 188222
I have a nice bolt supplier nearby, and picked up 4 new 5/8-11 bolts.
Attachment 188224
I installed the bolts today. That was a pain. No, I didn't have a 5/8-11 tap.
I now need to make some feet for the bolts to bear on. I don't think I want to concentrate that much force on my concrete floor. I'm thinking of using 2x2" x 1/4 aluminum plate with a divots drilled in the centers.
I'm working on a design that uses the existing metal table, with beams bolted to the sides of the granite plate, and lots of bracing. I still want a design that has a lower beam in front for a vice or 4th axis. I'm also starting reading "High Performance Machining". Fun times!