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.
Fossilman: Diana,if it would have been daylight hours,I would have ventured over to the car museum,but at 2 AM,I stayed put-LOL..Jean,rain coming here starting Friday,sounds like two days of down pours,Oregon style! Thumbs up
Aug 26, 2015 9:20:58 GMT -5
dhotrocknut: At 2am I'd be sleeping even in Vegas.lol
Aug 26, 2015 10:36:35 GMT -5
folgers: New on here....looking for sphere making equipment....a Barranca Fireball machine....thanks for any help or contacts
Aug 26, 2015 11:17:47 GMT -5
rockpickerforever: Besides sleeping and gambling, plenty of things to do in Vegas at 2 am!! (What happens in Vegas, stays in Vegas!!)
Aug 26, 2015 11:42:02 GMT -5
yeswinchris9: re bearing needed on the ultra tec faceter... which bearing and how did
Aug 26, 2015 13:33:35 GMT -5
Fossilman: LOL,my 1st time in Vegas (1971),I got to see the inside of their jail system at night!!!!!!! Nope didn't like it,not at all...........
Aug 26, 2015 13:44:27 GMT -5
mr.mohs: got busted for jay walking in Vegas... ...so I knew wouldn't have any luck gambling...mostly™
Aug 26, 2015 17:57:33 GMT -5
Fossilman: I was with a buddy that didn't have a brain! He stole a "Hookers" purse!! Told him not too,wouldn't be anything in it...Hey guess what,there wasn't anything in it!!! Glad I was underage! He wasn't!! They kind of rough him up a bit ......
Aug 27, 2015 9:11:28 GMT -5
Fossilman: The cops told me I should lose the bum,I guess he had a pretty good wrap sheet going in Cali and Montana...Went our different ways in Salt Lake City,Utah...
Aug 27, 2015 9:12:53 GMT -5
mr.mohs: your buddy took the line from the j.geils song to literally--- first I look at the purse
Aug 27, 2015 9:45:14 GMT -5
gemsgalore: I need some advice for tumbling my first opal. It's 2"w x 1-1/2"h, circumference is 4-1/2". I only have ceramic filler but no grinding grit on hand. Can I tumble without the grit?
Aug 27, 2015 10:22:46 GMT -5
jakesrocks: gemsgalore, please post your question here. http://andy321.proboards.com/board/22/totally-rock-tumbling
Aug 27, 2015 10:50:32 GMT -5
Fossilman: Ed-exactly!!! He seen the purse,told he was going to take it..I called him a moron and he proved to me,that I was right..I was 15,he was 23...
Aug 27, 2015 11:50:07 GMT -5
mr.mohs: gemsgalore-- I got better idea of what to do with that chunk of opal. Rather than put it in a barrel------- hand polish it with 37,000gr emery paper and save it as a specimen...mostly
Aug 27, 2015 17:15:54 GMT -5
dhotrocknut: Mike at least ya have an interesting tale to tell out of that mess.lol
Aug 28, 2015 18:24:51 GMT -5
dhotrocknut: FYI I'm no longer in Nevada and am going to get dinner and desert. I'll have to let you all know if it was worth the trip.
Aug 28, 2015 18:28:07 GMT -5
mr.mohs: get some sherbet ice cream for desert, diane.... that will cool you down... mostly
Aug 28, 2015 18:46:33 GMT -5
mikeyrocks: Hey ms D you on your way to S Cal? Safe travels
Aug 28, 2015 19:31:31 GMT -5
parfive: September Rock & Gem, coupla familiars on p29.
Aug 28, 2015 19:34:38 GMT -5