Just wondering if anyone has tried using sand as a pre-tumble before the first stage of 60/90 grit? If not that rushed to really start my first stage, I'll pre-tumble using sand, or the dust left over from smashing rocks. It seems to work fairly well. Instead of recharging everytime with new 60/90 grit.
No reason it wouldn't work, but it would oly cut soft materials. It needs to be coarse builder's sand. Windblown sand like what you find in deserty areas is rounded to the point it won't cut. it isn't useful for concrete production, eityher and that's why the Saudis have to import building sand. It would be useful, I guess, for cleaning off adherent mud and grainy material and removing crusts of soft minerals like calcite. Add vinegar and you have some real potential there. What kuind of stuff do you tumble and what effect does the sand seem to have? How long do you run that stage?
that's great, I was just thinking that very thing last night! I have a bunch of silica sand, I was thinking about using it in the tumbler prior to the 60/90, or maybe even in the vibe, I was thinking the sand in the vibe would be a great way to get good coverage and have a cushioning effect....however I'm concerned about the sand possibly scratching the material in the 500 and above stages...I'm going to test it on a batch of pet wood I'm not too concerned about...
I know my Grandfather used to use a hard gravel in his tumbler before the 60/90 stage...I still have a small amount of it...I'm not sure what kind of material it is...it's rough, angular, kind of black/grey...
Docharber, The effect is not that great, but it does seem to knock off the sharp edges. I polish anything found mostly agate, and pet wood, or anything else that may look nice polished. Bought some Amethyst, smokey quartz and tiger eye, which are tumbling with sand now. I'll get some pictures to show examples of rough, before and after tumbling in sand for about 45 hours. Normally about 100 hours at 78 rpm in sand. It isn't that often I do a pre-grind with sand, but it seems to help. Mikes, Use the sand only in a pre-grind stage before you start the first 60/90 stage. Never use the sand anywhere else execpt as a pre-grind. The sand is used as a replacement of the 60/90 grit. Re-charge as you go with new sand, if you are happy then you can start the first tumble with 60/90. Plus the sand or rock dust is free. Re-charging everytime with first grind 60/90 grit can get costly. This is just my idea, been doing this for a while and certainly won't hurt your hardest stones.
Post by ASI Industries on Apr 5, 2009 14:33:08 GMT -5
I know my Grandfather used to use a hard gravel in his tumbler before the 60/90 stage...I still have a small amount of it...I'm not sure what kind of material it is...it's rough, angular, kind of black/grey.
I got a 5 ton billet of Quartz-Dolerite in my rear garden just 6 inches below the surface, plus it is everwhere within 15 mile radius. -- I hail from (The Barony of Seabegs) Bonnybridge, Stirlingshire U.K, where aliens sometimes come for a visit!
If it's even muddy sandy stuff will work. You can basically place rough stones in a barrel with just water and the stones will create their own grit and round off some. It happens in nature, why wouldn't it happen in our tumblers? Grab a handful of any type sand and give it a try..see what happens.
Useing sand and water or nothing execpt water with your rough stones will do some degree of rounding. It doesn't matter what you are using as grit, just add a handfull, about 6-8 table spoons, add water to just cover the top of your stones and let it shake, rattle and roll. See what happens after 2-5 days. Most certainly the sand does help, but not as great as the 60/90. Could save some money if your are not in a real hurry to get your stones done. Or a low budget guy, like me, trying something different.
I have tumbled using sand as a "pre-grit" media more than a few times but I use it to clean rocks I collect or rocks that have been sitting outside for a while and have gathered organic mung. I will tumble them for a few hours with 4-5Tbsp of sifted beach sand or bulk quartz sand (available at craft stores or cheaper if you can find it as white sand ashtray filler). It definately starts to take the sharp edges off if you leave it going for a while but it would round off and break down quickly with most stones.
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Just wondering if anyone has tried using sand as a pre-tumble before the first stage of 60/90 grit?
A few old timers used to use sand in place of 60/90 because it was cheap. it takes longer. What makes Silicon carbide a better cutter is that it tends to break into smaller bits but fractures with new sharp/fresh cutting edges as it breaks down.
drocknut: Happy hounding fossilman
Feb 23, 2015 14:51:45 GMT -5
darkhorseleather: I'm looking to see if the person that created the Mozarkite Missouri shaped stones, still has some?
Feb 23, 2015 16:06:35 GMT -5
edmohs: Is Everybody In!? The Rock'n About to Begin....mostly
Feb 23, 2015 19:00:23 GMT -5
Shotgunner: OMG - extreme weather warning in LA County tonight. Windchill MAY get below 32oF lol dang I might have to put pants on... and a hoodie!
Feb 23, 2015 22:07:00 GMT -5
jakesrocks: captbob, it wouldn't allow me to add long hair on a guy avatar.
Feb 23, 2015 23:40:24 GMT -5
Fossilman: Going to have to customize Don...............Thumbs up
Feb 25, 2015 10:33:24 GMT -5
drocknut: LOL Shotgunner.
Feb 25, 2015 17:21:09 GMT -5
Pat: Shotgunner, get out your long johns! Going to be in the low 40s during the night for the rest of the week here. Ice cream cone day tomorrow. Yippee!
Feb 25, 2015 21:45:42 GMT -5
Fossilman: T Shirt weather.....................
Feb 25, 2015 22:54:03 GMT -5
rockpickerforever: Supposed to get cold and windy here, couple inches of rain forecast for the weekend, and then some. Even the desert is supposed to get liquid sunshine. We need it, but why can't it rain during the week? So much the for the rock field trip this weekend.
Feb 26, 2015 11:00:52 GMT -5
rockpickerforever: Fossilman, making a nice hot batch of the Jalapeno jelly today, yum!! Can't get enough of that stuff! Might go out and use the stove in the trailer, so I'm not breathing chile pepper fumes all day, lol.
Feb 26, 2015 11:04:07 GMT -5
rockpickerforever: Oh, I should mention... Cold here is maybe down into the 40s. Not that below freezing or below 0 type of insanity. Who can live in such a place that has those temps? And all that white stuff, uggghhhh!
Feb 26, 2015 11:11:22 GMT -5
drocknut: Chili pepper fumes, one way to clear out the sinuses..lol. I can handle the cold (btw 40 doesn't count as cold yet) but that hot stuff you call jelly geez how can you eat that...lol.
Feb 26, 2015 12:16:47 GMT -5
rockpickerforever: Diane, it's not the sinuses, the fumes make you gag and your throat burn. Trying to be considerate of poor, sick Lucy. Diane, you just don't know what you're missin. And yes, considering what it costs to live here, 40 degrees IS damn cold, lol.
Feb 26, 2015 12:42:17 GMT -5
edmohs: I'll just be grinding in the rain this weekend. And if you heard my singing it sounds just the same. rain or no rain...mostly
Feb 26, 2015 18:53:11 GMT -5
Fossilman: Tammy just made up a batch of Habanero jelly last week...........Yes,it clears the house for awhile...LOL Love that jelly too...Taking a jar or two to Roy's today..
Feb 27, 2015 10:14:32 GMT -5
rockpickerforever: Fossilman, that jalapeno jelly came out smokin' hot, the hottest batch yet. Close to being too hot, maybe?? The jalapenos give it that great flavor, add about ten Hot Black Cobra chilies for heat. Need to eat it with something to avoid stomach ulcers.
Feb 27, 2015 11:51:10 GMT -5
rockpickerforever: The rain is a'coming. Supposed to get cold, windy and wet tonight, and stay that way until Tuesday. Yep, field trip to Himalaya Mine on Saturday has been postponed... edmohs, okay to sing, mostly, but stay out of the rain! Grind 'em, baby, grind 'em!
Feb 27, 2015 14:37:30 GMT -5
snowmom: baking brownies....
Feb 27, 2015 16:45:55 GMT -5
wampidy: Food with pain has never made a lick of sense to me. Brownies sound good.
Feb 27, 2015 18:48:39 GMT -5