Cool, what i find!, i wish i could find something like this!, it looks homemade,looks
pretty old too.
The flywheel looking part on top is the eccentric driver,the stroke length is adjusted here, couldnt tell from the photo's but there should be an adjustment, the eccentric arm
bar with the holes drilled next to each other is the adjustment for the stroke position.
I would place a table top on this and use a sheet of formica, and get a pan to catch the abrasive slurry.
Looks like its driven by an A.C. motor, how many
RPM's does it turn?,is there any adjustment for varying the rpm's?. this is an important factor.