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.
nowyo: Yeah, I do. Got it home tonight. It was in the cellar of a farmhouse. Had to mostly disassemble it to get it through the door and up the stairs. The things we do for fun. I'll put it back together tomorrow night. Bet it hasn't been used in 30 yrs.
Aug 29, 2014 23:01:19 GMT -5
Rockoonz: It aint a big rock saw till you measure blade size in feet
Aug 30, 2014 0:02:45 GMT -5
Shotgunner: I did see a 4 foot oil saw recently. Same dude has a 12 foot cable saw....
Aug 30, 2014 11:09:24 GMT -5
wampidy: It ain't a big rock saw till you measure blade cost in thousands could be another way to put it. I can not imagine the cost of a 3 to 4 foot blade. We are talking a circumference of over 9 and 12 feet. That is a whole pile of diamonds.
Aug 30, 2014 16:21:44 GMT -5
Shotgunner: 48" x 0.257" segmented blade = $2700, cutting with biodiesel lasts years - as I am told
Aug 30, 2014 16:38:37 GMT -5
mr.mohs: this shouting reminds me of the $75,000 rock!...you guys remember that?
Aug 30, 2014 19:45:21 GMT -5
nowyo: Heck, I've got one of those right here in the yard! You got the cash? Take your pick! Any rock in the yard! Hell, all the rocks in the yard!
Aug 30, 2014 23:03:08 GMT -5
mr.mohs: post a picture!
Aug 30, 2014 23:39:42 GMT -5
Shotgunner: Wifey bought a tritip at Costco - smoking it now............ too early for beer
Aug 31, 2014 11:20:08 GMT -5
Fossilman: Scott,we had BBQ-ed tritip at the brother in laws lastnite...Great eating...
Aug 31, 2014 16:50:21 GMT -5
Shotgunner: Awesome Mike. Glad yours was good. Windy here and could not keep the fire going right. Mine was weaksauce.
Aug 31, 2014 18:19:01 GMT -5
kk: Scott if we talking about BBQ, the easiest starter regardless to wind-conditions: tissue with a little cooking-oil! Never leave home without it.
Aug 31, 2014 20:48:30 GMT -5
naynay777: How do you tumble Amber? I can't do it by hand, as I have Arthritis, can it be done, in a tumbler, fro 30 minutes, or less????
Aug 31, 2014 22:13:50 GMT -5
naynay777: If anyone, can help me, I would be ever so Thankful!
Aug 31, 2014 22:15:40 GMT -5
Fossilman: Naynay go to the Tumble forum on the top of the forum page,you will get all the help you need there-Thumbs up
Aug 31, 2014 22:58:50 GMT -5
Jugglerguy: Today I'm seeing that a "guest" has posted, but I can't see the guest's posts. Anyone know if I can change a setting somewhere to se posts by guests?
Sept 1, 2014 11:16:48 GMT -5
rockpickerforever: Yeah, that is kinda weird. It seems there have been some hiccups here in the last day or so, hope nothing bad is going on.
Sept 1, 2014 11:39:04 GMT -5
Shotgunner: Kurt, I do start my fires with corn oil. B ut ya cant wook that way for the greasy smoke and the wood wouldn't stay lit
Sept 1, 2014 14:45:55 GMT -5
thesterlingseraph: Hello, I am hoping someone here can lead me in the right direction. I have a 4.5" circular slab of very rare bright green Victoria Stone/Imori I am looking to sell. Does anyone know anyone who specializes in Victoria Stone? The slice is from the 1960's-70s
Sept 1, 2014 20:05:32 GMT -5