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.
jakesrocks: Hey Bob, haven't checked my shed yet. Don't know how much howelite he left behind. & a couple buckets of T-Eggs that I forgot I had. I'll check in the morning when it's cool. (101 heat index right now. Hotter in the shed.) Maybe I can fix ya up.
Jul 23, 2015 18:15:42 GMT -5
jenb: Does anyone have some good tips on identifying "slag"? I have some that I get on the beach in Michigan called Leland Blue. Sometimes it's hard to tell if it's slag or just a beach stone.....I know the pitts can help identify. Wondered if anyone has some ot
Jul 24, 2015 9:00:15 GMT -5
jenb: other good tips. Thanks
Jul 24, 2015 9:00:24 GMT -5
Fossilman: jenb,post photos in the ID section of the forum-you will get help there! Thumbs up...This is the BS section..
Jul 24, 2015 10:28:02 GMT -5
Fossilman: Don,what kind of Thundereggs do you have? I'm interested!! Thumbs up
Jul 24, 2015 10:28:50 GMT -5
jakesrocks: Hey Mike, I'm not sure. I inherited them from my old childhood rock mentor. Gonna haul them out, hose the bugs off & split a few to see what's there.
Jul 24, 2015 11:00:13 GMT -5
jenb: Hey, tried to post some pics, but it says the forum is full. It won't download my attachments.......any ideas??
Jul 24, 2015 16:50:26 GMT -5
jenb: I'm not the most computer savvy....maybe I'm doing something wrong..????
Jul 24, 2015 16:51:57 GMT -5
jakesrocks: You'll need a photo hosting site like Photobucket to post on here.
Jul 24, 2015 16:55:49 GMT -5
jenb: Who can explain how to post photos like they are speaking to a 4 yr old.........or 90 year old????????????
Jul 24, 2015 17:15:50 GMT -5
jenb: I get it....didnt mean the ?
Jul 24, 2015 19:57:48 GMT -5
mr.mohs: when in doubt-- shout it out! mostly™
Jul 24, 2015 20:11:47 GMT -5
drocknut: Rainy day here, we need the rain but it sure puts a damper on my mood and work.
Jul 27, 2015 10:55:12 GMT -5
jakesrocks: No rain here yet. Just very high dew point. 85 & feels like 95. Rain coming again tonight.
Jul 27, 2015 13:07:17 GMT -5
Fossilman: Cool today,showers lastnite-We get 7 or 8 days of triple digits coming again,starting tomorrow!!!....Huge frown!!!
Jul 27, 2015 15:00:52 GMT -5
jakesrocks: Better come back to the Dakotas Mike. Low to mid 80's for the next week. 50% chance of a sound & light show tonight.
Jul 27, 2015 21:03:12 GMT -5
jakesrocks: WooHoo, gully washer last night. Came in around 1:00 AM. 60 + MPH winds. Got all of the siding on the house washed. Don't need to haul out the pressure washer to do it.
Jul 28, 2015 11:03:40 GMT -5
drocknut: Sun came out and it's warming up but the wind is horrible.
Jul 28, 2015 12:26:38 GMT -5