matt2432
starting to spend too much on rocks
Member since December 2014
Posts: 171
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Post by matt2432 on Apr 13, 2015 22:13:10 GMT -5
Anyone else having issues with the polish stage on a UV-10 getting black bits of rubber embedded in their rocks? I'm using AO polish with a little bit of borax. It's for sure coming from the polish stage. I'll post some pictures tomorrow when I get them uploaded. I tried running it with soap, but it didn't clean it out.
Any ideas?
Matt
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Post by captbob on Apr 13, 2015 22:23:28 GMT -5
Kind of a side question, but can you post the number on bottom of the bowl? Should be a small circle with a single digit number in it. Trying to figure out if it's a bad lot of bowls.
How long have you had the UV-10 and when did you start getting the rubber sloughing off the bowl? Are you using a separate bowl for polish?
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tkvancil
fully equipped rock polisher
Member since September 2011
Posts: 1,546
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Post by tkvancil on Apr 14, 2015 9:02:01 GMT -5
I get those bits of plastic when I use my UV18. I have a separate bowl for polish and was alarmed the first time I used it by the sheer volume of the plastic. Was told by folks here that it is a normal occurrence. It has seemed to lessen slightly with each use. Some have said it happens in all stages but is less visible because the grits grind the plastic into nothing.
The plastic does get imbedded in small cracks. It also gets imbedded in softer areas. Have been fortunate in the fact that only a few pieces in each batch have been lost. Haven't found a way to remove it once it's in there yet. Very frustrating.
The only numbers I can find on mine are up in the cone. Both marked 4A.
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Post by captbob on Apr 14, 2015 10:29:48 GMT -5
Limited information so far, but so far I'm thinking the #4 bowls are the problem bowls. Would like to hear from Matt and have others chime in if they have bowls sloughing rubber as to the lot code number on their bowls.
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matt2432
starting to spend too much on rocks
Member since December 2014
Posts: 171
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Post by matt2432 on Apr 14, 2015 10:33:53 GMT -5
I'll check here at lunch and see what the number is. Is it a manufacturing defect?
This is the first time I've used the barrel, it's brand new and it is dedicated for only polish.
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matt2432
starting to spend too much on rocks
Member since December 2014
Posts: 171
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Post by matt2432 on Apr 14, 2015 12:07:17 GMT -5
The barrel I use for polish is a #4 bowl. I noticed rubber sloughing on the other barrel as well and it is a #3. Here's the embedded rubber in the cracks of the rock.
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rockymom
starting to spend too much on rocks
Member since March 2015
Posts: 118
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Post by rockymom on Apr 14, 2015 16:31:19 GMT -5
I use a UV 10 with borax and get the black "rubber" as well (always floats to the top). Where do you find the number 4?
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matt2432
starting to spend too much on rocks
Member since December 2014
Posts: 171
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Post by matt2432 on Apr 14, 2015 16:50:33 GMT -5
The number is molded into the bottom of the bowl.
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moogie
noticing nice landscape pebbles
Member since December 2013
Posts: 77
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Post by moogie on Apr 14, 2015 17:01:50 GMT -5
Apparently those bits end up in all stages, it's just that you see them in the polish stage. I always have gotten them, doesn't seem to hurt anything. To be blunt, if your rocks have deep crevices they may not be ready or may not be the right type of rock to take a polish anyway. It is disconcerting to see that you're bowl is wearing away, but I suppose rubber and rocks are going to react.
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Apr 15, 2015 0:30:21 GMT -5
Greetings [matt2432] Matt I agree with [moogie] on this point if your stones have pitts and crevasses your stones should be nowhere near the polishing phase, a little tip I picked yonks ago is to fill those pitts and crevasses with either a one part or two part glues, super glue is a favorite. Which may just be enough in order for a stone to pass my stingent uniform standard where a stone, becomes a reject just, because it developed a pitted area in the latter stages of polishing, sometimes the glued area needs to be refilled even after just one stage, I have rocks that are perfect in all my criteria, except it has got rock rot (a gaping big hole) where the softer rock has worn away. I too have noticed black floating specks when I use Aluminum Oxide polish, but never noticed them when I used Tin Oxide, one other little factor i have noticed all the rocks have a golden tinge (a chemical reaction) if I use Tin Oxide, whereas using Aluminum Oxide or Diamond the rocks just appear to have a clean clear abrasive shine. I even had some Copper Oxide (finely ground Malachite), that is only about 3-4 on the Moh's hardness scale, that polishes some harder rocks like Quartz and Agates using a chemical reaction rather than abrasive action. Please check out my Sticky's below. -- Please click images to open larger images in a new Tab, same with everything that is Underlined! I currently have a 3lb Beach (UK), Lortone QT 12/66 (USA) rotaries & 2x Viking Vibrasonic (Diamond Pacific) (USA) virbrating tumblers, with Silicon Carbide grit F80, F220, F600, F1200, with Tin Oxide (1.0 micron) & Aluminum Oxide (1.0 micron & 0.3 micron) polishes. I hail from (The Barony of Seabegs) Bonnybridge, Stirlingshire, U.K, where aliens (15mb) sometimes come for a visit & about 4 miles west from that monstrosity & 7 miles west of this new monstrosity! Sticky's: their contents are resource information 1#: Vendors worldwide (2mb), 2#: How to use the forum, 3#: How to identify rocks & minerals, 4#: Save money on expensive grits & polishes, 5#: Aussie Lapidary Forum: Rock Tumbling Guide!
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matt2432
starting to spend too much on rocks
Member since December 2014
Posts: 171
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Post by matt2432 on Apr 15, 2015 8:39:46 GMT -5
Apparently those bits end up in all stages, it's just that you see them in the polish stage. I always have gotten them, doesn't seem to hurt anything. To be blunt, if your rocks have deep crevices they may not be ready or may not be the right type of rock to take a polish anyway. It is disconcerting to see that you're bowl is wearing away, but I suppose rubber and rocks are going to react. I agree with it not being the right type of rock. In this case, the only rock in the batch that had issues with cracks happened to have some softer bands in it that undercut. It spent 6 weeks in the rotary getting shaped before it went into the vibe. I typically wouldn't try to polish one like that, but it just looked too neat not to try. Next time I'll try to use superglue to fill the cracks like Andrew suggested. I didn't have issues with any of the other rocks. Matt
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Apr 15, 2015 11:03:42 GMT -5
Greetings [matt2432] please have a look here too. Need tumbling tips.Please check out my Sticky's below. -- Please click images to open larger images in a new Tab, same with everything that is Underlined! I currently have a 3lb Beach (UK), Lortone QT 12/66 (USA) rotaries & 2x Viking Vibrasonic (Diamond Pacific) (USA) virbrating tumblers, with Silicon Carbide grit F80, F220, F600, F1200, with Tin Oxide (1.0 micron) & Aluminum Oxide (1.0 micron & 0.3 micron) polishes. I hail from (The Barony of Seabegs) Bonnybridge, Stirlingshire, U.K, where aliens (15mb) sometimes come for a visit & about 4 miles west from that monstrosity & 7 miles west of this new monstrosity! Sticky's: their contents are resource information 1#: Vendors worldwide (2mb), 2#: How to use the forum, 3#: How to identify rocks & minerals, 4#: Save money on expensive grits & polishes, 5#: Aussie Lapidary Forum: Rock Tumbling Guide!
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matt2432
starting to spend too much on rocks
Member since December 2014
Posts: 171
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Post by matt2432 on Apr 25, 2015 14:01:04 GMT -5
Ok, so if my rocks don't have any cracks they won't get the rubber embedded in them. But what about for polishing natural shaped petrified wood like Jamesp did just a little bit ago? forum.rocktumblinghobby.com/thread/69793/inch-petrified-wood-nuggets-finishedIs there any way to prevent the rubber from getting stuck in them in a UV-10? a different polishing process? different vibe? Matt
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