notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Mar 6, 2017 12:32:06 GMT -5
at work we have sic that comes in bulk 2000 lbs bags on pallets. every once in a while someone will stab through one of them bags with a forklift. then take off from the storage area leaving a trail all the way through the plant. because they are lazy they will leave the pile on the floor for days sometimes. long story short I grabbed a shovel and 5 gal pail and scooped some up. (should have gotten more as there was probably 4 more buckets of it there) but it comes in bags with no grit designation. heres a photo next to some 60/90. anyone care to take a guess as to grit size? the 60/90 is on the right.
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Post by HankRocks on Mar 6, 2017 12:49:35 GMT -5
About 10 to 20 range.
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,685
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Post by Fossilman on Mar 6, 2017 12:55:56 GMT -5
That would work great on some odd rough,like that tough Oregon jasper we find...LOL
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,169
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Post by jamesp on Mar 6, 2017 15:10:13 GMT -5
The dark particles are AO 80 and the larger clear particles are AO 22. Looks like 20-30 range to me.
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Mar 7, 2017 0:37:14 GMT -5
it cuts for sure I threw some in the diy tumbler and my slurry was like toothpaste thick almost after 4 days. my load was a little light maybe 60 to 65 percent full rocks mixed sizes water to just under level of rocks. had to add water tumble for 5 or so minutes to thin it out b4 I dumped out the barrel.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,169
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Post by jamesp on Mar 7, 2017 5:21:58 GMT -5
Yep. SiC 30 will shape fast, make mud in a hurry if it gets circulated with the rocks from the start. You can pour out some thick slurry, add water to thin slurry, add grit, roll on, skip the dump.
Can you find out what SiC that is and how much 2000 pounds cost ? I would guess 50 cents per pound, maybe less. I think I have used about 500 pounds of siC 30 in 5 years at a cost of $1300(incl. shipping). You guys must run industrial tumblers ?
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Post by MrMike on Mar 7, 2017 5:51:51 GMT -5
it cuts for sure I threw some in the diy tumbler and my slurry was like toothpaste thick almost after 4 days. my load was a little light maybe 60 to 65 percent full rocks mixed sizes water to just under level of rocks. had to add water tumble for 5 or so minutes to thin it out b4 I dumped out the barrel. Let's see some pictures of your DIY tumbler & barrel
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Mar 7, 2017 8:48:48 GMT -5
Yep. SiC 30 will shape fast, make mud in a hurry if it gets circulated with the rocks from the start. You can pour out some thick slurry, add water to thin slurry, add grit, roll on, skip the dump. Can you find out what SiC that is and how much 2000 pounds cost ? I would guess 50 cents per pound, maybe less. I think I have used about 500 pounds of siC 30 in 5 years at a cost of $1300(incl. shipping). You guys must run industrial tumblers ? its used to set chemistry in ductile iron castings. straight into the furnace. they add copper, sic, feromagnesium, molybedinum, ect to get the propertys they need for different jobs. I could try to find out price but I would have to ask someone in accounting lol. I'm just low lvl machine repair guy. although the price would prob be irrelivent since we use probably a pallet a week and order a tractor trailer load at a time. I'm sure they get decent bulk pricing.
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Mar 7, 2017 8:50:21 GMT -5
it cuts for sure I threw some in the diy tumbler and my slurry was like toothpaste thick almost after 4 days. my load was a little light maybe 60 to 65 percent full rocks mixed sizes water to just under level of rocks. had to add water tumble for 5 or so minutes to thin it out b4 I dumped out the barrel. Let's see some pictures of your DIY tumbler & barrel I posted some in this thread. forum.rocktumblinghobby.com/thread/77845/preformed-tumbles
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,169
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Post by jamesp on Mar 7, 2017 9:01:56 GMT -5
Yep. SiC 30 will shape fast, make mud in a hurry if it gets circulated with the rocks from the start. You can pour out some thick slurry, add water to thin slurry, add grit, roll on, skip the dump. Can you find out what SiC that is and how much 2000 pounds cost ? I would guess 50 cents per pound, maybe less. I think I have used about 500 pounds of siC 30 in 5 years at a cost of $1300(incl. shipping). You guys must run industrial tumblers ? its used to set chemistry in ductile iron castings. straight into the furnace. they add copper, sic, feromagnesium, molybedinum, ect to get the propertys they need for different jobs. I could try to find out price but I would have to ask someone in accounting lol. I'm just low lvl machine repair guy. although the price would prob be irrelivent since we use probably a pallet a week and order a tractor trailer load at a time. I'm sure they get decent bulk pricing. You may find yourself in a great position for resale if your company would let you buy a 2000 pound pallet and skip shipping cost... Repackage and sell in flat rate boxes. Best price I could find was $88/50 pounds plus shipping. If you could buy at $25/50 pounds you could more than triple your $$$. Many use SiC 30 and many do not....
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doublet83
starting to spend too much on rocks
Member since March 2016
Posts: 118
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Post by doublet83 on Mar 7, 2017 10:01:06 GMT -5
For the frugal tumbler, buying grit 50 points at a time is not enough, haha.
I've always wondered about the tumbling costs of a large scale commercial guy. For myself, I estimate it costs about $4 to produce a finished pound of tumbles, not including my labor and material costs.
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Post by MrMike on Mar 7, 2017 17:12:54 GMT -5
Awesome build, well done!
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