I have been using a tumbler modified from a HF concrete mixer for a few years now and I LOVE IT!! [i covered most of the outside with thick felt to cut down the noise [not quiet, but much better].
My favorite medial is punch-out drops of all sizes and shapes, mostly 1.5 inches and under.. Have tried many, many others and much prefer the steel drops. If I list all the things I have tried this post will be so long nobody will read it :)
When removing forge scale it generates a lot of nasty, semi-oily dust that gets all over the shop and all over the work being tumbled.
Years ago I tried adding a cup of Tide powdered laundry detergent [dry, I don't use liquids of any kind in the tumbler] and that produced tumbled parts that had nasty, semi-oily black Tide FIRMLY coated and stuck to everything. It was nearly impossible to get off and the only result was hours and hours of extra work to get off.
Does anyone have something dry they actually use themselves to capture the black forge junk?
I just took blades from the tumbler and they are coated with the forging residue. Many tools in the shop have a light coating of this gunk that I will have to wash off in several steps.
What do you use?
Thanks,
Dave