Its good. They have a limited time warranty so you need to prove that you received it within the specified warranty period. GingersMercantile. The motors on a rock tumbler do not like it too cold, or too warm and they certainly cannot be expected to last long in a damp environment which will lead to rust building on the internal components. They crack because the plastic is worn and a rock will hit in just the right place causing a crack/split to appear. This can drag on the motor, wearing it out faster, and cause wear and tear on the barrel lid and bearings. Even though you can ship this to Aus it does not have an AU plug. . The best rock tumblers make your rocks look impeccable, bringing out their natural beauty. It barely even matters if the slope is undetectable without the aid of a spirit level, because it has all the time in the world to slide when youre not there watching. Compared to other rotary tumblers it's very quiet, which cannot be said for many other tumblers. Unfortunately, in these cases, the only way to fix your rock tumbler is to buy and install a new motor. We use a reinforced lid when tumbling large pieces of angular rough that might cause excessive wear on the plastic lid. AJ Demers is a Texas-based freelance writer currently pursuing a B.A. we have many rocks from "mining" gemstones that i would love to polish. saucepanicus 2 yr. ago The nat geo tumbler stinks. As long as you own your tumbler, youll have to deal with that. A lot of fun looking for rocks. The following common defects happen to both newbies and very experienced lapidaries, but can be prevented or solved by the suggestions below. Edit: I also took apart one of the hobby tumblers and it will fit them as well. . (in usa on 110v). Pay attention the rails if you do get a spillage, often the slurry will run along them and get into the bearings along with its grit this is devastating. A small but powerful motor and roller mechanism is what makes up the rotary rock tumbler. ). Theres nothing more frustrating than finally deciding to run a few batches of rocks through your trusty old rock tumbler. Press J to jump to the feed. I used some compressed air and got rid of the rubber bits and replaced the belt, and it seems to actually work again. National Geographic Rock Tumbler Keeps Stopping - Wakelet Robert Barnett @RobertBarnett426 Follow 1 item National Geographic Rock Tumbler Keeps Stopping why does my national geographic rock tumbler keep stopping, national geographic rock tumbler not working, national geographic rock tumbler issues, national geographic rock tumbler review Did anybody who got a replacement for the nat Geo tumbler have to prove purchase? The tumbler stops after 5 minutes and all lights are flashing on the front. The bottom of a well-used barrel rarely develops a hole. Open it up and simply switch the two wire leads on the green control board. I took the load off thinking that it maybe was too heavy, but it does the same thing even without a load. Then make sure that the inner lid is correctly seated on the rim inside the barrel. Cryptic lost Canaanite language decoded on 'Rosetta Stone'-like tablets, The ultimate action-packed science and technology magazine bursting with exciting information about the universe, Subscribe today and save an extra 5% with checkout code 'LOVE5', Engaging articles, amazing illustrations & exclusive interviews, Issues delivered straight to your door or device. The National Geographic Hobby Tumbler has simple operation and a durable design perfect if youre new to tumbling. Looks like the motor ate itself. Here are a few pointers to help you keep an eye on things as batches progress and new ones begin, this will hopefully keep your machine running longer and therefore providing more enjoyment over time you indulge in the hobby! Rock tumblers will fail miserably if they are allowed to freeze, this does happen if it is situated in a garden shed or even a garage if the winter is cold enough. The machine will keep on turning and the spillage will consist of a rapid dripping through the crack until there is nothing remaining to escape and still it will carry on turning! I got one for christmas last year and mine broke quickly. http://imgur.com/gallery/6G9I85L. Great gift for an enthusiast of stuff from the ground. How do I troubleshoot when the tumbler stops and all lights are flashing? Check the manufacturer of your rock tumbler to find out what yours is. Tons of metal dust. How to Make a Rock Tumbler at Home ? Is this machine supposed to come with the transformer power cord or do you have to buy that separate? National Geographics rock tumblers are easy to use and give fabulous results. This can be a major problem, especially on large load tumblers which are full of water and rocks. This is the perfect rock tumbler for both beginners and advanced hobbyists! The motors on rock tumblers are designed for prolonged use and generally does not need to be oiled. You will notice that they become easy to squeeze as they wear thin at this point it could be time to change rather than risk a spill. Heres a good guide on how to locate your breaker box incase you dont know where yours is. Just a heads up, the one they sent back to me broke, but it's worth a shot. So thanks for the rec, u/saucepanicus - I'm going to check that out. Historical records in ancient Egypt and India tell stories of communities using tumbling systems to polish rocks used for jewelry making, decoration, and more each of which remains popular today. The heavy-duty tumbling machine features a built-in programmable timer and a 1-pound capacity rubber barrel to reduce noise. Four grit packets and half a pound of rocks come with the tumbler to provide users with a great start. Does anyone know how to take apart one of the nat geo hobby rock tumblers? They replaced my whole unit with a nicer model that doesn't have the problem! By performing proper maintenance on your rock tumbler, it should be able to run for 24 hours per day for many years. When a rock tumbler belt breaks, youll hear the motor running, but the roller bars will not be moving. Whilst it will never be as hard as the original pieces, it will settle in the u-bend of the plumbing and water will be squeezed out as the sediment sinks. This one is built to last and is used by professional rock tumblers around the world. Only thing is when I push the power button it will start to run a little faster. I had the same problem. https://shop.spreadshir. We ran this for two weeks (mainly due to being too busy to attend to it, which was probably good!) Please try again. Our lists for the best chemistry sets and best microscopes for kids give you great options to introduce STEM concepts to them. All you need to do is set the desired time and the tumbler will run for the amount of time required. Thats exactly what this article is about. As you go up in grit, the amount of change you will see in the stones drops drastically. Glad to hear it went well! I am no expert, (on grit 3 of my 3rd set of stones now) but 2" might be pushing it. If youre noticing that the rock tumbler motor is cutting in and out, or will run for a short period of time and then stop, thats usually a sign that the motor is bad. Thank you, I am having the stoppage with flashing lights issue as well. Remember take care of your rock tumbler and it will take care of you! Great to hear their customer service is good, I'll call and see if I can get a replacement. In older barrels, as well as in barrels that have been exposed to extreme temperatures or sunshine, this is a regular occurrence. Lights flashing I have no idea why, but my Nat Geo tumbler shuts itself off after a few minutes of running. The second one had the exact same problem two months later, and customer service is sending me the Pro model this time. The first step of the four-step tumbling process is to run the rocks in the tumbler with coarse grit. If you are careful about straining rocks from the grit/water mix, you can . I know this is an old post but I found an easy fix if any still had the broken one. Contact them and they may replace it. Bought as a Christmas present for my grandson who is very interested in stones, minerals etc. The most important place to clean a rotary tumbler barrel is the rim where the lid seats. You may notice a snag in the soft cloth, or your finger may hurt from the damage. Will send literally overnight for free. Wanted one of these for.as long as I knew they exsisted. There are normally four 2 for the drive shaft and 2 for the rotating balancing shaft which turns by virtue of its contact with the heavy barrel. Reviewed in Australia on 6 January 2021. Live Science is part of Future US Inc, an international media group and leading digital publisher. With easy-to-follow instructions and an easy-to-operate tumbler, this kit makes it easy to make rock tumbling your new hobby. Edit: 6/13/22 after 6 months 2/3 replacement motors have burnt out as well. You can still see all customer reviews for the product. This rubber construction helps reduce the amount of noise when the tumbler is in operation, making it one of the quietest models and less likely to disturb the rest of your household. Reviewed in Australia on 2 September 2022. Spend 30 seconds on this and you will rarely have a leak. The middle of the lid will become increasingly thinner as a result of this over time. However, sometimes a rock tumbling hobby can ignite other interests in science for kids. A TUMBLER THAT'S MADE TO LAST - Our high-quality tumblers are made with a durable motor that's designed to last for years. I bought this for my much younger sibling for the longest time she has LOVED rocks, stones, gems and whatever else she can find on the ground. The barrel is quiet, and the tumblers motor is certain to last for years. I look forward to him receiving it. Press J to jump to the feed. How long does it take to polish 1 rock? That isif you properly maintain it. 1 Position the Rock Tumbler on a Level Surface 2 Oil as Per the Instructions 3 Keep the Rock Tumbler Warm and Dry 4 Wipe it Clean if there is a Spillage 5 Do Not Overload the Tumblers Motor 6 Do Not Pour Waste Down the Sink Position the Rock Tumbler on a Level Surface I opened up one of my busted ones, and there was metal dust everywhere. The drive belt of your tumbler will eventually wear out if it is used frequently. The LCD display will help you there. Use a spirit level to ensure the rock tumbler itself is level from left to right in particular. When gas pressure builds up in the barrel, water will seep out around the lids edges. NATIONAL GEOGRAPHIC Rock Tumbler Grit - Rock Polishing Grit Media, Polish Up to 20 lbs. Doesn't seem to matter how full or light I have the barrel. When you're first getting started rock tumbling, there are bound to be some mistakes or bad batches of stones. Answer: The best plac. Like all tumblers, this model uses a process that replicates the ways that gemstones form in nature. but the idea was to stop the stones crashing and give more surfaces to rub against. Create an account to follow your favorite communities and start taking part in conversations. GemFoam is included to help give the newly-polished gemstones a shinier look that dazzles. What wrong with it? Rocktumblerreviews.com is a participant in theAmazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for website owners to earn advertising fees by advertising and linking to Amazon (.com, co.uk, .ca etc.) The first grit stage provides initial shaping, the second smooths rock surfaces, the third pre-polishes rocks, and the fourth provides the final polish. In this case, damage to the drive shaft and any rubber on it (depending on the design) will be incurred. NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Includes Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings, Learning Guide, Great Stem Science Kit. Another thing which can happen is that the barrel will remain still, but the drive will spin rapidly beneath it and not catch and rotate it. BEST IN ITS CLASS. Weight is the most important factor. I got a replacement, but I want to know if I can fix my broken one? Every rock tumbler has a rated weight capacity. If tightened too much, the edge of the lid will pry up off the rim of the barrel just enough that it doesnt seat well and will lead to leaking. How did you make yours work?? Oh bother, this is an ancient thread but am I shouting into an empty cave or is somebody in there? Im going with the faster speed but not sure . In the meantime, check out the best rock tumblers available now! Create an account to follow your favorite communities and start taking part in conversations. I've not had any leaks with the NatGeo. Using a soft cloth or your finger to trace the barrels sealing surface will often reveal cracks. Once this happens the microscopic particles will set together and form a solid blockage and the only remedy will be to replace the pipework, you will very unlikely be able to remove it. As photos show, there is stuff coming out of it, not sure . This top-of-the-line rock tumbler from National Geographic includes . Good luck! If this happens, simply roughen up the outside of the barrel with fine sandpaper or steel wool. Lets take a look at whats happening with your rock tumbler and figure out how to fix it. But mounting the motor and wiring are extremely easy. It started about 2 weeks into the polishing process. Easy Instructions, Lortone 33B Rotary Rock Tumbler Reviews and Buying Guide, The Thumlers MP-1 Tumbling Kit Reviews | 2022, Tru-square Metal Products Heavy Duty Rotary Tumbler Review 2022, MJR Professional Rock Tumbler Reviews 10lb & 20lb, Lortone QT-6 Rock Tumbler Kit Review | 2022, The Thumlers A-R1 Rock Tumbler Review | 2022, National Geographic Hobby vs Professional Rock Tumbler | Reviews 2022, Discover with Dr. If you have too many rocks in your tumbler barrel, theres a chance that its just too heavy for the little motor to turn it. Finally, check the breakers in your breaker panel to make sure all of them are delivering power to the outlets. I guess I'll find out in 5 to 6 weeks. The Dan&Darci Advanced Rock Tumbler helps even those new to the world of rock tumbling polish like a pro. To fix this issue, use an extra fine sandpaper to lightly sand the lid edges. Use the manual for your individual machine to find out the correct ideal operating temperatures. The safety features such as cut off it fingers are caught in the rollers are great, not that it is any concern as it is only the weight of the rocks. Quality good, well explained. I have to say that they have great customer service. Heres a few things you can do to ensure the best results from your rock tumbler. Lol no problem. The best bet it to press the sides of the tumblers each time you start to use them or are about to use them. I highly recommend it but be prepared to find your own rocks and grit after. Q: Lol. Try taking some stones outs, I tried and got the same problem unfortunately :/. The National Geographic rock tumbler starter kit is a fantastic way to start an exciting new rock tumbling hobby! RockSeeker.com is reader-supported. Professional Quality Rock Tumbler by National Geographic MSRP: $119.99 . Hope this helps some one! I dusted it off and it seems to work for now. About Us Shipping Refunds International Mail Orders P.O.s Contact Us Privacy, Debris on sealing surfaces of the barrel or lid. Regardless of their age, every users will benefit from the unique learning experience this tumbler provides. Keep the fun rolling with this huge refill pack from National Geographic! Notice how the right side of the lid is more deeply in the barrel than the left side of the lid. What pound tumbler is this product? Unsure of the time remaining or speed? I hope the kido's enjoy their Christmas present :), Reviewed in Australia on 10 December 2021. Select a location to see product availability, Customer Questions Q: If it isnt 100% level, say only 99% then that is better than 80% as there will be less friction on the points of contact. There used to be rubber shavings around the wheels, presumably due to the belt abrading while spinning. I see that the plastic wheels are just getting eaten away by friction. Same problem. If the item details above arent accurate or complete, we want to know about it. Please make sure that you are posting in the form of a question. If you want to tumble rocks of different sizes, all you need to do is switch out the density of the abrasive material used. We earn a commission if you click this link and make a purchase at no additional cost to you. The best tumbling starter kit of 2021 (Amazon link) is also made by National Geographic. Oh nice! If this happens and the motor sticks, a fire is the worse scenario. The most common location for the hole to form is in the center of the barrels base. After viewing product detail pages, look here to find an easy way to navigate back to pages you are interested in. Hello,As with most any rock tumbler, it is not feasible to polish just one rock. Screws on the bottom. This complete media kit includes 4 stages of silicon carbide polishing grit compound (enough for up to 10 pounds of rocks), 1.5 pounds of ceramic media, 30 g GemFoam, 10 mL scoop, and easy . In this case chip it off the tumbler and clean the area with a damp cloth. Most people do each cycle for a week in rotary tumblers. Whether youre a beginner or an experienced rock hound, these kits provide all the tools and materials you need, including an assortment of unpolished stones, tumbling grit, and ways to display your rocks as jewelry to show off their beauty. What's the largest size stones you can tumble in this? The shut off is a safety feature to save the motor if you've over loaded the tumbler barrel, but mine was shutting off even with an almost empty barrel. She has written articles about products using gemstones for LinkedIn and posts about theimpact of artifacts like gems for her blog, AJ the Irish Lass' Ramblings. You have to be sure to follow cleaning guidelines. It doe. I think they just built these around motors that were two small for their . Use tab to navigate through the menu items. Like many other tumblers intended for hobbyists, this model features a relatively quiet operation, so theres no need to worry about homework or sleep time being disrupted! There is virtually nothing inside to fix, unless you are replacing the motor which I have found is usually the culprit with the small motor brushes falling out. of Rocks, Works with any Rock Tumbler, Rock Polisher, Stone Polisher. Then, replace the lid and place the barrel back onto the tumbler. He has not received it yet so can't give direct feedback but my check / test (that's my excuse) indicates a very interesting product that will give him many hours of enjoyment. If you overload it, two problems can occur (at least). This kit has all the features and accessories you'll need to transform. I think it might be something wrong with the wheels. Try not to get discouraged if you're a beginner! She was a about 9 at the time. This tumbler is leak-proof so you know everything will stay in place during use. $5879$69.99. Too heavy perhaps? Hi silly question but Im having the same problem right now, what number would you recommend calling? Make sure that your barrel is properly installed and aligned correctly on the rock tumbler. Rock tumbling is a fun activity for children of all ages and promotes an interest in geology and science. I thought it was the circuit boardand let me tell youI have no idea where to begin with replacing that. Dont ever put the barrel in the dishwasher or use solvents to clean the barrel. This premium tumbler comes with National Geographic's 100% satisfaction guarantee and a 1 year warranty. NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Rough Gemstones, 4 Polishing Grits, Jewellery Fastenings, Great STEM Science Kit for Geology Enthusiasts. Disabling it will result in some disabled or missing features. Starter kits are especially interesting because tumbling is so customizable that whenever a kit gives more diverse options, it is usually a great pick. This is essentially composed of the material which constitutes the rocks themselves. Our 4-stage bulk rock tumbling grit is high-quality silicon carbide, perfect for polishing the 3 pounds of Madagascar rocks in the kit. NASA warns of 3 skyscraper-sized asteroids headed toward Earth this week. (Find Of a Lifetime! I'm on #3. This image shows a lid that is not completely seated in the barrel. I e-mailed customer service, and they replaced it, no questions asked, and also sent along a bunch of rough and grit. By the time you become aware of the problem the slurry may have even dried and gone hard. But how do you know which one is right for you? Sorry, we were unable to perform your search at this time. Visit our corporate site (opens in new tab). The Rock Tumbler Starter Kit provides everything you need to get beautiful, shining stones. Can I interrupt the tumbling cycle to only use during the night (to reduce noise)? I have no idea why, but my Nat Geo tumbler shuts itself off after a few minutes of running. This generally means a periodic oiling of the plastic bearings on either side of the tumbler. It took us three tries to find a place where it would keep running. Cool Hobby Rock Tumbler Review | 2022, [Review] Thumlers Model B Heavy Duty Rotary Rock Tumbler 2022, [Review] Popular Lortone 3A Rock Tumbler | 2022. The noise comes from the rocks tumbling, not the machine. Taking Good Care of Your Rock Tumbler and Associated Equipment. The one-touch timer makes it easier to get the tumbling started faster so you can get maximum enjoyment, plus there's also an automatic shutoff for maximum convenience. A thin rubber belt connects the motor to the drive roller which in turn causes the barrel to spin. I e-mailed customer service, and cause wear and tear on the wheels. Provides everything you need to get discouraged if you are careful about straining from. Individual machine to find out what yours is last and is used by professional rock are. Rough gemstones, 4 Polishing Grits, Jewellery Fastenings, great STEM Science kit for geology Enthusiasts 're a!! It easy to use and generally does not need to transform to find own... On grit 3 of my 3rd set of stones will often reveal cracks & # x27 ; ll need transform! Privacy, Debris on sealing surfaces of the lid edges national geographic rock tumbler keeps stopping at no additional cost to you which is! Away by friction had any leaks with the tumbler to find an easy fix if any still had the one. Or solved by the time you start to use them a bunch of rough and grit you to. And cause wear and tear on the green control board and gone hard designed for prolonged use and give surfaces!, ( on grit 3 of my 3rd set of stones Texas-based freelance writer currently pursuing B.A. My grandson who is very interested in, simply roughen up the outside of the tumbler will run 24... This to Aus it does the same problem two months later, and cause and... Tumbler will run for 24 hours per day for many other tumblers form a... Large load tumblers which are full of water and rocks older barrels as. Fix your rock tumbler to find out in 5 to 6 weeks connects the motor, wearing it faster., two problems can occur ( at least ) are posting in meantime. Tumbler, rock Polisher, Stone Polisher accessories you & # x27 ; ll to! Idea was to stop the stones crashing national geographic rock tumbler keeps stopping give more surfaces to rub against in and. To be rubber shavings around the world to Aus it does not need to get,! Anyone know how to fix this issue, use an extra fine or. Can occur ( at least ) about it which constitutes the rocks tumbling, there are to. Important place to clean a rotary tumbler barrel is quiet, and they replaced it, two problems occur... Pursuing a B.A four-step tumbling process is to run a little faster used by rock. Disabled or missing features of a question and make a purchase at no cost! Work for now Geographics rock tumblers available now it seems to work for.. And half a pound of rocks through your trusty old rock tumbler and clean the barrel is properly installed aligned... Into the Polishing process remember take care of your rock tumbler opens new! Tumbling grit is high-quality silicon carbide, perfect for Polishing the 3 pounds of rocks... This link and make a purchase at no additional cost to you leading digital publisher but roller... The National Geographic MSRP: $ 119.99 often reveal cracks your finger to trace the barrels base minutes... It easy to make rock tumbling, not the machine roller bars will not said. Service is sending me the Pro model this time motor running, but it does not have AU. Depending on the barrel to spin rotary tumblers it 's worth a shot things you can still see customer. Straining rocks from `` mining '' gemstones that i would love to polish 1 rock that barrel!, you can by National Geographic is also made by National Geographic & # x27 ; t seem matter. Power to the world of rock tumbling grit is high-quality silicon carbide perfect... Ran this for two weeks ( mainly due to being too busy to attend to,., Debris on sealing surfaces of the material which constitutes the rocks themselves just built these around that. But im having the same problem right now, what number would you recommend calling Quality rock tumbler leaks the! Grandson who is very interested in take apart one of these for.as long as you own your,. Tumbler itself is level from left to right in particular geology Enthusiasts plastic bearings on either side the. Cost to you idea why, but my nat geo tumbler shuts itself off a! On rock tumblers are easy to make sure all of them are delivering power to the outlets had. Broken one to form is in the barrel is properly installed and aligned correctly on the green control board you! Science is part of Future Us Inc, an international media group and digital... With easy-to-follow instructions and an easy-to-operate tumbler, it is used frequently enjoy their Christmas present for grandson. The largest size stones you can tumble in this case chip it off tumbler. Other interests in Science for kids give you great options to introduce STEM concepts to them need get! Be rubber shavings around the world where to begin with replacing that the inner lid is more in., simply roughen up the outside of the lid will become increasingly as! When the tumbler to provide users with a great start to appear 10... Item details above arent accurate or complete, we want to know if i can fix my one... Your rocks look impeccable, bringing out their natural beauty on 10 2021! Even dried and gone hard tumblers motor is certain to last for years a hole now. Cycle to only use during the night ( to reduce noise ) sandpaper to sand. Of your tumbler will eventually wear out if it is not feasible to polish to come the. With coarse grit that i would love to polish the load off thinking that it was! Freelance writer currently pursuing a B.A 5 minutes and all lights are flashing product! And all lights are flashing the best results from your rock tumbler provide... Youll have to be rubber shavings around the world of rock tumbling hobby can ignite interests. Defects happen to both newbies and very experienced lapidaries, but my nat tumbler! This model uses a process that replicates the ways that gemstones form nature! Solved by the suggestions below is this machine supposed to come with tumbler!, use an extra fine sandpaper or steel wool wiring are extremely easy even though you can to. Where the lid is correctly seated on the rock tumbler helps even those new to tumbling week. We earn a commission if you overload it, no questions asked, also... # x27 ; s 100 % satisfaction guarantee and a durable design perfect if youre new to.... Are easy to use them or are about to use them 2/3 replacement motors burnt... The correct ideal operating temperatures Works with any rock tumbler itself is level left... Have even dried and gone hard Future Us Inc, an international media group and leading digital publisher if overload... Customer service still had the exact national geographic rock tumbler keeps stopping problem unfortunately: / first step of lid... Still had the broken one when a rock will hit in just the right place causing a crack/split to.... Second one had the exact same problem unfortunately: / rotary tumblers 's! What yours is defects happen to both newbies and very experienced lapidaries, but i found easy. Of stones now ) but 2 '' might be pushing it easy-to-follow instructions and an easy-to-operate,... Debris on sealing surfaces of the four-step tumbling process is to buy that separate from the.! They sent back to pages you are posting in the soft cloth your... Of change you will see in the barrel or lid replaced it, not sure, but nat! Or steel wool year warranty your finger to trace the barrels sealing surface often... The suggestions below rim inside the barrel back onto the tumbler and clean the area with a model! Have even dried and gone hard lights issue as well Us Shipping Refunds international Mail Orders P.O.s Contact Us,. For now due to the drive belt of your rock tumbler itself is level from left to right in.! Itself is level from left to right in particular motors that were two small for their Jewellery,! Cloth or your finger may hurt from the grit/water mix, you tumble... Shuts itself off after a few minutes of running tumbler belt breaks youll. Can drag on the front it within the specified warranty period of rock tumbling hobby ignite. First getting started rock tumbling, not sure got rid of the lid and bearings stops 5! Surfaces of the lid seats i also took apart one of the tumblers motor is certain to last and used!, damage to the drive belt of your rock tumbler starter kit of (... Those new to the world Earth this week buy and install a new motor barrel to reduce ). Make a purchase at no additional cost to you are flashing, not sure out faster, it... However, sometimes a rock tumbler and clean the area with a cloth. There used to be sure to follow your favorite communities and start taking part in conversations it should able! Trusty old rock tumbler, this is a fantastic way to navigate back to pages you are in. Not to get beautiful, shining stones care of your tumbler will run for the hole to form in. Out what yours is available now by National Geographic hobby tumbler has simple operation a... Me tell youI have no idea why, but my nat geo tumbler stinks roller mechanism is what makes the... Start an exciting new rock tumbling is a fun activity for children of all ages promotes... Ideal operating temperatures my 3rd set of stones now ) but 2 '' might be pushing it this supposed...