I'm interested in the grits your using. Is it like a powder? The rotary came with some stuff for rocks thats fine like a powder.
I figure about 2 or 3 more 12pks I have this polishing down.
Yup, the powder grit is geared more for rock, sand paper without the paper. Looked at the piece this morning, the outside circumference has a nice frosted feel to it, nice and even. The faces appear hardly touched, but they were hacksaw cuts so do not really qualify in the example. I did put a good fingernail catcher scratch (0.001 -0.002?) upon the circumference to use as a reference. It is just about gone. Trying to get an idea of how much material is removed vs. time - grit.
Give it another 5-6 hours and switch it over to the 220 grit. I know the object is to remove as little material as possible to achieve the best possible finish but like sighting in the 44 mag gotta have a wide range to start with. Spent 20 years listening to the "We've always done it this way" without any explanation as to why, most cases no one actually knew, also spent a few weekends working and grumbling as the "why" had turned into "OH! Thats WHY." Darn tool room never did stock those cans of Edge Margin or that mysterious part stretcher tool.
Rotary tumbler also seems to be sensitive to the amount of media contained. Too much and the parts don't get trapped reducing the slide time. Seems should be just enough so the media and part is carried up the side leaving just enough ramp for the parts to fall, slide down against.
Coffee, that's what I need. UPS slow boat to bring the vibratory tumbler one of these days.