To go further, I'm thinking caking would be less prevalent if the barrel was stopped or checked much further down the road. To a small degree, I'm not surprised at what you're finding in such a short time period. I gathered you discovered this when checking the barrel after that time period. It wasn't until your most recent post that I saw you discovered caking after 24 hours. Don't know how long this will be, so please bear with it, and I'll apologize in advance for length. As soon as I stepped up to 6 lb barrels, I noticed a significant increase in how grit affected the rocks.Ģ0:19:55 GMT -5 aDave said:How long have you waited before dumping out the grit/slurry after shutting off the tumbler? If you have pulled the barrel and then rested it upright for any amount of time, all of the solids will settle to the bottom and cake some of your rocks. FWIW, I started my tumbling routines with a 4 lb barrel. I don't own a tumbler as small as yours, but there really isn't alot of weight in your barrels to help break down grit. 46/70 won't be broken down properly as there isn't enough weight in the barrel to do so.ĮTA: I'll lastly add that a barrel that holds more weight will be more efficient with the grinding process. That tells me I am getting the max out of the grit, and the balance of large to small material is good enough to break that stuff down.Īs an aside, if you are speaking about the coarse grind, don't use anything more coarse that 60/90 in your tumbler.
I'm using a larger tumbler than you, but all grit is pretty much gone when I've done my weekly cleanouts. You might have to change your ratios of smalls versus large rough so the grit can be broken down properly. It's a two way street - you need to find a balance between how much grit you have and the right rock mixture to make all of the grit "go away."
That said, if you're finding you have an excessive amount of grit left over, your tumbling has not been efficient enough to break down the grit. How long have you waited before dumping out the grit/slurry after shutting off the tumbler? If you have pulled the barrel and then rested it upright for any amount of time, all of the solids will settle to the bottom and cake some of your rocks.
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