notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Mar 14, 2017 10:57:23 GMT -5
friendly fire casualty.
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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 14, 2017 8:42:26 GMT -5
ill take box 5.
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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 13, 2017 11:41:36 GMT -5
use an idler pulley off motor to cut rpm say in half. then up to your shafts. I thought about using a center idler pulley off a drill press on mine but then decided to just turn 1 out of wood.
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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 10, 2017 10:18:23 GMT -5
what size wheels you using?
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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 10, 2017 10:17:27 GMT -5
awesome I'm thinking of building 1 myself.
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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 8, 2017 9:16:52 GMT -5
I have 3 more big rocks ready for the vibe captbob . Rolling one per 7 pound barrel in coarse runs. I have a 30 RPM shaft that holds 3 barrels, and a 55 RPM shaft that holds 4 barrels(all 7 pound capacity). I am considering changing the 55 RPM shafts to 20 RPM for rolling the big rocks. Way to fast and abusive at 55 RPM for 1-2 pound rocks. Grind and grit breakdown using 1-2 pound rock with 1-2 inch rocks at slow RPM faster than a barrel full of only 1-2 inch rocks at 55 RPM. As far as finishing, I could run all three together in the Vibrasonic if I had a piece of real stiff rubber wedged it the hopper. Hopper width is 6 inches at widest point. So the rubber has to be darn stiff to wedge in the hopper at 6 inches long. I might be able to cut a polyethylene Walmart butcher block really close to fit the inside contour of the hopper and wedge it in there. The polyurethane hopper liner is so tough it allows running the coarsest of grit without wear. It is also soft, and gives in about like tire rubber. May allow a wedged in piece of stiff plastic like butcher block or hard nylon. james 6 inches wide how deep is it?
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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 8, 2017 1:38:38 GMT -5
If you are going to mark them for use in the same stage, you don't even need to wash them. Quick rinse if it makes you feel better, but no need to go crazy. I do let them dry out before storing them so there isn't any moisture to allow mold/bacteria to grow, may be that even that is not necessary, but that's just me being overly cautious. Not sure what you are doing with baking soda...? I don't understand. Is your stage 4 your polish or a yet finer grit? I don't recall anyone ever using baking soda for a tumbling additive, can you post the YouTube link for that? This is the guy that led me to this forum - he does it in this video: I don't know if I would take to much advice from a guy who says course grind for 4 days. I'm doing my first tumble and some have been in coarse for well over a month.
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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 22:59:45 GMT -5
your gonna be happy with it. my box came in yesterday. nice stuff cut a cpl small ones already.
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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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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 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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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Mar 7, 2017 0:26:25 GMT -5
Very promising... watching! Have four 15 lb barrels to go deal with today. SO many pictures to take. Our rock show was this past weekend, lots to photograph from there too. Hate taking pictures! grumble grumbleI took this out of rotary in SiC 30 yesterday. It has been in the vibe short of 24 hours w/AO 80 and wetter than normal Borax. The AO 80 does not waste time in the vibe. I will let it run till tomorrow and then go to 18 hour polish run. Sawn off a 1.5 pound Rio cobble. Smaller rocks take 2 days to get to this shine in vibe using 80. Just saying, out of SiC 30 and about straight to polish. wide gamut does that ao80 trick work in the rotarys as well?
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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 0:00:17 GMT -5
james its uhmw "ulta high molecular weight" tyvar brand name we use it at work mainly for chutes coming off conveyers thousands of cast iron parts falling on it everday we replace them every few years.
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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 6, 2017 23:51:55 GMT -5
no biggie Jeremy I was just gonna take some more as it looked like no one was interested in the uncut boxes. and I liked them as much or more than the cut box. so figured ide snatch another up rather than have you sitting on it. then thought ill be tumbling what I got for a while lol. if you make up some boxes in the future and I see them for sale I might grab some. don't go out of your way though I have enough to keep my little 3 pound barrels spinning for a while.
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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 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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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Mar 6, 2017 12:05:26 GMT -5
Your uhmw ends are screwed directly into the walls of the 8" PVC? Curious how the threaded rods that the wing nuts are on are attached to the barrel. I've noticed that many home crafted tumblers have some kind of hose on the shafts, figured it gives the barrels better traction. No slippage on your bare shafts? What is the RPM of your barrels? That really looks to be an ingenious build. Thumbs up! yepper drill out pilot holes in the pvc or the screws will most definetly break the heads off going in. I countersunk the screw holes in the uhmw and used just plain old 1 1/4 sheet rock screws. guess I should have taken some pics of the barrel build. the lid tightening bolts are carriage bolts recessed a little into the umhw. not a lot just enough to put the head flush with the uhmw. been running a month and showing very little signs of wear. when the heads lose their domed shape ill simply change them out. judging by wear in past month I figure they will go easily a year b4 replacement is needed.
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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 6, 2017 11:37:04 GMT -5
Excellent build. Never thought about direct driving both shafts off of reduction pulley. Post-traction. Maple pulleys, any size you please. Go thru a lot of trouble getting desired pulley sizes. And belts. You can even trim them to match a given belt length. V-belts last forever on a tumbler. Shape edges and trim out and wife may allow it as a piece of furniture. I found with the posi drive I don't even need to sleave the shafts. they just don't slip. that or it could be all that black goo from the roofing rubber gaskets that's kinda why I didn't get the acetone out and clean all the crap off the barrels.
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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 6, 2017 11:07:35 GMT -5
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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 6, 2017 10:54:39 GMT -5
8 inch pvc with uhmw scraps from work screwed onto them with roofing rubber for gaskets. lid has 6 inch opening with carriage bolts and wingnuts. to hold lids on. see above I posted a couple more pics.
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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 6, 2017 10:33:36 GMT -5
its a coarse workhorse tumbler I made for wife. up and running for about a month now. the first hf started about 3 weeks b4 I had this one built. It basically just does coarse with some really aggressive sic I got from work (not sure what grade it comes in 2000lbs bags on pallets no grit designation)I add grit at about day 4 do cleanouts every Saturday and pick out the best rounded ones. from there it goes through all the normal stages in the hf tumblers for 1 week. coarse 60/90, med 150/220, fine 500, since I started the small hf tumbler near end of January the polish barrel is still empty. I figured a separate barrel for each grit was the way to go? the 6 inch pulleys on the shafts are maple I just turned them out on my wood lathe. idler is oak since I didn't have a chunk of maple thick enough to do a 2 step pulley. with bearings in it. motor is old dryer motor till I find a smaller one way more power than is needed. motor pulley maple. if I ever want to make a speed change I just turn out a new pulley whatever size I want easy peazy. 3/4 inch shafts. the pillow blocks were the only parts I bought everything else was scrounged. barrels are 8 inch pvc with uhmw screwed on ends. one is 8" long the other 6". I used roofing rubber for gaskets (that's all the nasty black gook on them) I do use a small paddle in them 3/8ths by 1 inch epoxied in hopefully not enough to slam them around but just enough to prevent the slide.
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