Brian
fully equipped rock polisher
Member since July 2020
Posts: 1,512
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Post by Brian on Feb 12, 2021 7:58:54 GMT -5
My first, and so far only, tumbler is a Dr.Cool Pro, and it is exactly the same as the NG Pro with a different sticker on the front, so I will be very interested in seeing your review of you decide to review the NG Pro. Mine has been working well so far. It's been going almost non-stop since September 2020. As others have mentioned already, it has 3 speeds, but after watching many tumbling videos on Youtube, I'd say the slowest speed it still quite a bit faster than any other tumbler I have seen. I only use it at the slowest speed. I have had some pretty decent results, even with the starter selection of rocks they shipped with the tumbler. The instructions that come with the tumbler are overly simplistic (1 week with each of the grits). My take so far is that as long as people take the time to learn tumbling techniques and buy good grits and other supplies like ceramic filler, they can get some pretty decent results with this tumbler. I definitely plan to graduate to a better tumbler at some point, but for now it serves my hobby needs quite well. I am looking forward to your review! I wonder if the high speeds of the tumbler are to speed up the grinding and to fit better with their instructions. Since it is geared towards kids, patience and a willingness to wait months for results could play into the speed of the tumbler and time suggested in the instructions.
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Post by Jugglerguy on Feb 12, 2021 8:47:37 GMT -5
My first, and so far only, tumbler is a Dr.Cool Pro, and it is exactly the same as the NG Pro with a different sticker on the front, so I will be very interested in seeing your review of you decide to review the NG Pro. Mine has been working well so far. It's been going almost non-stop since September 2020. As others have mentioned already, it has 3 speeds, but after watching many tumbling videos on Youtube, I'd say the slowest speed it still quite a bit faster than any other tumbler I have seen. I only use it at the slowest speed. I have had some pretty decent results, even with the starter selection of rocks they shipped with the tumbler. The instructions that come with the tumbler are overly simplistic (1 week with each of the grits). My take so far is that as long as people take the time to learn tumbling techniques and buy good grits and other supplies like ceramic filler, they can get some pretty decent results with this tumbler. I definitely plan to graduate to a better tumbler at some point, but for now it serves my hobby needs quite well. I am looking forward to your review! Thanks for the tip about this being the same as the Dr. Cool tumbler. I had noticed that too, but kind of forgot about it. I should probably mention that in my video. I'll bet sales went up with the name change. Did yours come with those foam cubes? I'm still curious about those. My Nat Geo Pro is supposed to arrive today. It will be at least a month until a video is done, but there will be a video. I expect the first video to end with failed results, but I'll do another video showing how to use it properly.
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Post by Jugglerguy on Feb 12, 2021 8:50:34 GMT -5
My first, and so far only, tumbler is a Dr.Cool Pro, and it is exactly the same as the NG Pro with a different sticker on the front, so I will be very interested in seeing your review of you decide to review the NG Pro. Mine has been working well so far. It's been going almost non-stop since September 2020. As others have mentioned already, it has 3 speeds, but after watching many tumbling videos on Youtube, I'd say the slowest speed it still quite a bit faster than any other tumbler I have seen. I only use it at the slowest speed. I have had some pretty decent results, even with the starter selection of rocks they shipped with the tumbler. The instructions that come with the tumbler are overly simplistic (1 week with each of the grits). My take so far is that as long as people take the time to learn tumbling techniques and buy good grits and other supplies like ceramic filler, they can get some pretty decent results with this tumbler. I definitely plan to graduate to a better tumbler at some point, but for now it serves my hobby needs quite well. I am looking forward to your review! I wonder if the high speeds of the tumbler are to speed up the grinding and to fit better with their instructions. Since it is geared towards kids, patience and a willingness to wait months for results could play into the speed of the tumbler and time suggested in the instructions. It seems like it would beat up the rocks going so fast. I couldn't figure out why they have different speeds. I have read something in the past about Thumlers making a high speed version of their tumbler. The timer thing cracks me up too.
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electrocutus
spending too much on rocks
Member since October 2020
Posts: 341
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Post by electrocutus on Feb 12, 2021 9:54:48 GMT -5
My first, and so far only, tumbler is a Dr.Cool Pro, and it is exactly the same as the NG Pro with a different sticker on the front, so I will be very interested in seeing your review of you decide to review the NG Pro. Mine has been working well so far. It's been going almost non-stop since September 2020. As others have mentioned already, it has 3 speeds, but after watching many tumbling videos on Youtube, I'd say the slowest speed it still quite a bit faster than any other tumbler I have seen. I only use it at the slowest speed. I have had some pretty decent results, even with the starter selection of rocks they shipped with the tumbler. The instructions that come with the tumbler are overly simplistic (1 week with each of the grits). My take so far is that as long as people take the time to learn tumbling techniques and buy good grits and other supplies like ceramic filler, they can get some pretty decent results with this tumbler. I definitely plan to graduate to a better tumbler at some point, but for now it serves my hobby needs quite well. I am looking forward to your review! Thanks for the tip about this being the same as the Dr. Cool tumbler. I had noticed that too, but kind of forgot about it. I should probably mention that in my video. I'll bet sales went up with the name change. Did yours come with those foam cubes? I'm still curious about those. My Nat Geo Pro is supposed to arrive today. It will be at least a month until a video is done, but there will be a video. I expect the first video to end with failed results, but I'll do another video showing how to use it properly. Mine did not come with the foam cubes. I am also curious about those. It looks like they could replace plastic beads for small batches.
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electrocutus
spending too much on rocks
Member since October 2020
Posts: 341
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Post by electrocutus on Feb 12, 2021 10:00:18 GMT -5
I wonder if the high speeds of the tumbler are to speed up the grinding and to fit better with their instructions. Since it is geared towards kids, patience and a willingness to wait months for results could play into the speed of the tumbler and time suggested in the instructions. It seems like it would beat up the rocks going so fast. I couldn't figure out why they have different speeds. I have read something in the past about Thumlers making a high speed version of their tumbler. The timer thing cracks me up too. I had a few rocks breaking up at the lowest speed, but to be fair, they had cracks that would like have split with any tumbler. You can set the run timer to between 1 - 9 days but it's kind of silly. If I stop it mid-run to check up on the rocks (for example after 2 days) it goes back to the original setting right away. I need instead to just take the barrel off the rollers without stopping it. Anyway, I almost feel like it's a conumdrum of waiting until I get better at it before buying a better tumbler, but feeling the tumbler will not let me get much better :-)
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Post by jasoninsd on Feb 12, 2021 10:52:41 GMT -5
It seems like it would beat up the rocks going so fast. I couldn't figure out why they have different speeds. I have read something in the past about Thumlers making a high speed version of their tumbler. The timer thing cracks me up too. I had a few rocks breaking up at the lowest speed, but to be fair, they had cracks that would like have split with any tumbler. You can set the run timer to between 1 - 9 days but it's kind of silly. If I stop it mid-run to check up on the rocks (for example after 2 days) it goes back to the original setting right away. I need instead to just take the barrel off the rollers without stopping it. Anyway, I almost feel like it's a conumdrum of waiting until I get better at it before buying a better tumbler, but feeling the tumbler will not let me get much better :-) I look at your last sentence this way: If an individual with subpar experience (as we all have when we start) uses subpar equipment, then there's two main variables in the equation for success. I really do believe better equipment eliminates the one variable so the person is only left with their own inexperience...which with time will change to "more" experience. Time won't make subpar equipment better than what it is... I've had this same mental battle with "equipment" in other hobbies and interests in my life...golf...pool...darts. And in my experience in all of them I really do believe better equipment enables the "average Joe or Josephine" to achieve greater things than without it...
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,605
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Post by jamesp on Feb 15, 2021 8:15:42 GMT -5
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Wooferhound
Cave Dweller
Lortone QT66 and 3A
Member since December 2016
Posts: 1,432
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Post by Wooferhound on Feb 15, 2021 8:24:57 GMT -5
Yeah I checked those links- "5 best of 2021" and "10 best Rock Tumblers" Literally the Worst Tumblers money can buy.
Substitute the word "Best" with "Cheapest".
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Post by greig on Feb 15, 2021 9:56:47 GMT -5
An innocent search of "rock tumbler" brings these machines up. Nat Geo and Harbor Freight are well advertised. First thing I notice is the Amazon USA price on the yellow machine is $49 USD. The exact same one on Amazon.ca (Canada) is $130 CDN, plus tax. Dang rock pirates.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,605
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Post by jamesp on Feb 15, 2021 11:26:22 GMT -5
Yeah I checked those links- "5 best of 2021" and "10 best Rock Tumblers" Literally the Worst Tumblers money can buy. Substitute the word "Best" with "Cheapest".
Incredible Woofer. There is enough of a challenge tumbling without being aggravated with unreliability. And hate to see newbies walk away from the hobby because of a poorly made tumbler experience up front.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,605
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Post by jamesp on Feb 15, 2021 11:27:28 GMT -5
Exchange rate making Amazon yet more wealthy greig.
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Post by Jugglerguy on Feb 15, 2021 16:07:23 GMT -5
For the good of the rock tumbling hobby a 5 word review seems most appropriate IMO: "Do not buy this tumbler." This review is based on so much negative feedback from so many posts on RTH since the Nat Geo was introduced. Harbor Freight and Nat Geo tumblers both have frustrated many a newbie. jamesp , that's exactly what I thought until I started this thread and heard some opinion from those who own them. I'm starting to change my mind. It seems like the biggest problem is the grit that is included with the machine. I wrote the company a couple days ago to ask exactly what is in the included grit packs. I was told that it is all silicon carbide. The sizes are 60, 150, 600, 1000. That's right, they consider 1000 silicon carbide to be polish. The directions also say to run the first stage for 3-5 days. The other stages are 6-8 days. No wonder people don't get shiny rocks. I'm going to do an honest review of this thing. I'm going to do a second video hopefully showing how to get rocks to shine for those who have already purchased this machine. This review by holajonathan really made me think about my initial thoughts on this tumbler: Nat Geo Review
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Post by Jugglerguy on Feb 15, 2021 16:09:26 GMT -5
Yeah I checked those links- "5 best of 2021" and "10 best Rock Tumblers" Literally the Worst Tumblers money can buy. Substitute the word "Best" with "Cheapest".
I have read some of those lists and watched some similar videos. In one video, the guy couldn't even pronounce "agate". The problem is Amazon affiliate links. It's so hard to trust reviews when people only get paid if someone buys the product being reviewed.
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Post by Jugglerguy on Feb 15, 2021 16:10:08 GMT -5
An innocent search of "rock tumbler" brings these machines up. Nat Geo and Harbor Freight are well advertised. First thing I notice is the Amazon USA price on the yellow machine is $49 USD. The exact same one on Amazon.ca (Canada) is $130 CDN, plus tax. Dang rock pirates. That's just ridiculous.
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Post by holajonathan on Feb 16, 2021 2:01:01 GMT -5
Some little West Texas rocks tumbled in my 2 pound Nat Geo. First in 60/90 SiC, then in 120/240 SiC. About 3-4 weeks in the Nat Geo tumbler. After that, 3 days in the Lot-O with 500 AO, and 1 day with sub-micron AO polish. They are pretty shiny. When it comes to the course stage, the little Nat Geo does the same thing as my Thumbler's Model B, or my 3 x 12lb Covington tumbler, or any other rotary tumbler: it rounds them off and wears them down. It is no worse in any way except the capacity. In my case, it has required less maintenance or baby sitting than my big, bad, name-brand tumblers. I have come to enjoy having one or two little tumblers going for batches like this -- a small group or small, delicate rocks that I want to keep separate and keep an eye on.
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Post by holajonathan on Feb 16, 2021 2:02:25 GMT -5
Some little West Texas rocks tumbled in my 2 pound Nat Geo. First in 60/90 SiC, then in 120/240 SiC. About 3-4 weeks in the Nat Geo tumbler. After that, 3 days in the Lot-O with 500 AO, and 1 day with sub-micron AO polish. They are pretty shiny. When it comes to the course stage, the little Nat Geo does the same thing as my Thumbler's Model B, or my 3 x 12lb Covington tumbler, or any other rotary tumbler: it rounds them off and wears them down. It is no worse in any way except the capacity. In my case, it has required less maintenance or baby sitting than my big, bad, name-brand tumblers. I have come to enjoy having one or two little tumblers going for batches like this -- a small group or small, delicate rocks that I want to keep separate and keep an eye on. The rock on the bottom left is one of my favorites of all time. Mediocre photo; awesome rock.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,605
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Post by jamesp on Feb 16, 2021 8:22:47 GMT -5
For the good of the rock tumbling hobby a 5 word review seems most appropriate IMO: "Do not buy this tumbler." This review is based on so much negative feedback from so many posts on RTH since the Nat Geo was introduced. Harbor Freight and Nat Geo tumblers both have frustrated many a newbie. jamesp , that's exactly what I thought until I started this thread and heard some opinion from those who own them. I'm starting to change my mind. It seems like the biggest problem is the grit that is included with the machine. I wrote the company a couple days ago to ask exactly what is in the included grit packs. I was told that it is all silicon carbide. The sizes are 60, 150, 600, 1000. That's right, they consider 1000 silicon carbide to be polish. The directions also say to run the first stage for 3-5 days. The other stages are 6-8 days. No wonder people don't get shiny rocks. I'm going to do an honest review of this thing. I'm going to do a second video hopefully showing how to get rocks to shine for those who have already purchased this machine. This review by holajonathan really made me think about my initial thoughts on this tumbler: Nat Geo ReviewThe complaints were related to the mechanical reliability Jugglerguy. It would be a key point in a review. A tumbler needs to be well built to handle 24/7 operation. Just saying that breakdowns can be really frustrating. $10 for each bearing is a good rule of thumb. Got to have good bearings. Some or all of these machines even include a trend setting variable speed drive which is a great option. Sure speeds up the coarse grind and at slow speed will lay down a rip polish.
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darcyj76
starting to shine!
Member since February 2021
Posts: 45
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Post by darcyj76 on Feb 17, 2021 23:12:08 GMT -5
I started using my Nat Geo Professional one about 10 days ago. It went 6 days straight with no problem, I took everything out, looked at it, put it back in with a few added, and started it again. It ran for about 2 days, and now it displays an E. I read that means it is overfill, so I removed some rocks and some slurry, and put it back on. Another E! Tried again, another E. I am down to it being 1/3 full (I was keeping it 2/3 full, like it says) and still, I am getting an E. Do you have any thoughts on this, or experience with it? I bought a...I am forgetting the name. Lortone 33b? It won’t be here for a week, and I would love to get things moving again! Hello to all, this is my first post on the forum. My then-8-year-old son received the NatGeo Pro model (2 lb barrel) as a Christmas gift 2 years ago. It has been in constant use since then, and seems to running fine. This is the only tumbler I have ever owned. Here are some opinions and observations: It's still running! It has not needed anything, not even a belt replacement (an extra came with the kit). The rubber barrel and lid are high quality. The plastic rollers seem a little cheap, and now have minor grooves worn into them. They have good bearings. If the barrel is overloaded, the unit will stop and the display shows an error message. This irks me, but I soon learned the max load, and mostly stay within the design limits. I have no real complaints about the unit itself, with one exception. If the power in your home goes off, even for a second, the unit stops and must be turned back on. That's somewhat annoying since the windy winter storms in my area cause power-flickers a few times a month. The kit came with an assortment of mixed hardness rocks, and grit packets. We followed the instructions precisely, and as you can guess, disappointment ensued. Of course, one week in stage one is usually not enough. Plus, a mixed hardness load is doomed from the start. Also, not one rock took anything close to a shine. Over the last 2 years I have slowly learned to get great results with agates and petrified wood, so I stick with that. Thanks to the many experts on this forum, my lurking has led to very decent results. The unit has 3 speeds, and I think they are all probably too fast. I'm thinking of getting a Lortone 45c, for more capacity. I like to tumble some larger specimens, and have even done an oblong agate 4 inches long! I ran it solo for 6 weeks, with sub-1 inch laker agate rubble. Turned out great. My experience has ultimately been positive but they sure could produce happier customers if they included realistic instructions (so folks would be aware of the need for multiple weeks in course grind). They should also just supply a single variety of easily polished rocks. Hope this helps someone!
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thaddeus
off to a rocking start
Member since February 2021
Posts: 4
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Post by thaddeus on Feb 18, 2021 1:08:22 GMT -5
DarcyJ76, my NatGeo tumbler has stopped and showed the "E" message in a variety of circumstances: -Unbalanced load. This happened a couple times when I was running a couple of oversized rocks together. It was like two bowling balls in a clothes dryer... -Contents stuck to one side of the barrel. My slurry was very thick and the power failed, leaving the load to congeal all night on the lowest point. -Overfilled. Only happens to me if it is filled more than 3/4 full. I'm not sure what to think about your situation. More than a couple times, I cured the error message by adding a bit more water. Thick pudding slurry seems to lead to more errors. Sounds weird but I think that the high rate of speed this unit runs at can easily produce situations where the rocks are really crashing chaotically inside the barrel. Adding a little water seemed to smooth out the action. Good luck!
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darcyj76
starting to shine!
Member since February 2021
Posts: 45
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Post by darcyj76 on Feb 18, 2021 1:09:44 GMT -5
That is incredibly helpful, thank you! DarcyJ76, my NatGeo tumbler has stopped and showed the "E" message in a variety of circumstances: -Unbalanced load. This happened a couple times when I was running a couple of oversized rocks together. It was like two bowling balls in a clothes dryer... -Contents stuck to one side of the barrel. My slurry was very thick and the power failed, leaving the load to congeal all night on the lowest point. -Overfilled. Only happens to me if it is filled more than 3/4 full. I'm not sure what to think about your situation. More than a couple times, I cured the error message by adding a bit more water. Thick pudding slurry seems to lead to more errors. Sounds weird but I think that the high rate of speed this unit runs at can easily produce situations where the rocks are really crashing chaotically inside the barrel. Adding a little water seemed to smooth out the action. Good luck!
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