jamesp
Cave Dweller
Member since October 2012
Posts: 36,561
|
Post by jamesp on Sept 24, 2016 11:51:45 GMT -5
For a two pound chunk of rhyolite. Media before tumbling, plus added rocks to make up for lost volume over a 13 day period smoothing 3 large rocks separately. Basically regular tumbles without smalls. Running that 2 pound rock sure seems to grind faster. The 30 grit is flat gone in 24 hours. Add fast rotating 55 RPM. Rocks protected by thick clay slurry. Rhyolite pre-ground and 2 days in rotary: Vibe media for large obsidian, ready for polish run.
|
|