Vibratory Rock Tumblers
Faster than rotary. Uses less grit, polish, and electricity per pound of rock.
Good News About Lot-O-TumblersLot-O-Tumblers are being manufactured again. We expect to receive another small shipment in late October and will offer those tumblers to people who have been on our "waiting list" the longest. Once all people on the waiting list have been given an opportunity to buy a Lot-O-Tumbler, we will place "Buy Buttons" on this webpage. At this time, we don't know how much they will cost, but we will find out when the next shipment arrives. Thank you for your patience! |
Status of Thumler's Vibratory TumblersThumler's Tumblers manufactures the popular brand of UltraVibe vibratory rock tumblers. We really like these tumblers, and we use them all of the time because they produce spectacular results. Unfortunately, Thumler's has not produced these tumblers since about December 2022 because they have been unable to obtain some of the necessary parts. Fortunately, RockTumbler.com still has almost all of the replacement parts for these tumblers. |
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Temporarily Out of Stock More Information |
Tumbles about 4 pounds of rock in pieces up to about 2 1/2 inches.
This is our favorite vibratory rock tumbler. The Lot-O-Tumbler Single can tumble a four-pound load of rocks from start to finish in about one week.
We start by loading our rocks, filling the barrel with water, and then inverting the barrel and allowing the water to drain. Now you have just enough water to wet the surface of the rocks. Then we add two level tablespoons of medium silicon carbide grit (about 150/220) and two level tablespoons of water. We then allow the machine to run for 12 to 24 hours. Then we rinse the rocks and add fresh grit. Continue 12- to 24-hour runs with medium grit until the rocks are smoothed to your preference - usually three or four runs. Wash the rocks and barrel thoroughly. Then run 24 hours with water and two tablespoons of fine grit (500 or 600 silicon carbide). Wash the rocks and barrel thoroughly. Finish with water and two tablespoons of TXP Polish or Rapid Polish for 24 hours or until polished. The process is that fast.
The Lot-O-Tumbler uses about 50% as much grit as a rotary tumbler of similar size, and about 25% of the electricity per pound of rock. The polish is usually awesome! We have polished a lot of jasper, agate, petrified wood, and natural glass in a single Lot-O-Tumbler.
Read the full description on the product page. This tumbler must be glued to a concrete block or the floor for proper operation. More Information!
Tumbles about 8 pounds of rock in pieces up to about 2 1/2 inches.
Process twice as much rock in the double barrel Lot-O-Tumbler Twin. It has two barrels that each process about four pounds of rock (eight pounds total).
This is a very economical tumbler to operate because of its small grit and electricity consumption per pound of rock. It is also economical to purchase. For a small price increase over the Lot-O-Tumbler Single (shown above), you double your productive capacity.
For proper operation, this tumbler must be glued to two concrete blocks or to another stationary object. Also, both barrels must be loaded for proper operation. If you don't have enough rock to use both barrels, simply fill the other barrel with ceramic media and a little water and it will do fine. More Information!
Why We Love Vibratory Rock Tumblers
Our tumbling methods changed after we purchased our first vibratory tumbler. We used to do all of our tumbling in rotary tumblers, but once we learned how fast a vibratory tumbler can smooth and polish rocks, and how nicely they can polish, we almost totally abandoned using a rotary tumbler for the medium grit, fine grit, and polishing steps. We now do almost all of that tumbling in a vibratory tumbler. (The only exception is when we tumble soft materials like glass or obsidian. For those, we start with medium grit in a rotary tumbler, then go to vibratory for fine grit and polish.)
Instead of allowing our rocks to run for a week in a rotary tumbler for the medium, fine, and polishing steps, we do that same work in a vibratory tumbler in one to three days per step. It more than cuts our tumbling time in half - and at the same time, cuts our electricity bill. The amount of grit and polish saved is also substantial. We have an article that explains how much money you can save on grit, polish and electricity with a vibratory tumbler.
The Small Drawbacks, and Accommodating Them
In a rotary tumbler, the rocks tumble in a rotating barrel. In a vibratory tumbler, the rocks are shaken in a bowl. The rotary tumbling process does a better job of rounding the rocks. A vibratory tumbler does not change the shape of the rocks as much. We like our tumbled stones well-rounded, so we get that done by running them in coarse grit in a rotary tumbler until we are satisfied with their shape. We feel that the rounded shape is worth spending the time and the electricity. However, as soon as we have the shape that we want, the rocks go straight into a vibratory tumbler for the medium, fine, and polishing steps.
Vibratory tumblers also cost a little more and make a bit more noise - but if you fill the bowl to almost full and keep the moisture level right, the noise will be greatly reduced. Most people run them in a basement, garage, or outbuilding where the noise will not bother anyone. We used to run a Lot-O-Tumbler single in our basement. The noise could be heard upstairs at night. So, we would start the tumbler in the morning before breakfast and rinse the rocks before bedtime. That gave us about 14 to 16 operating hours per day and fresh grit in the tumbler each morning. :-)
The Vibratory Learning Curve
Vibratory tumblers take a little more learning and experimenting than rotary tumblers. The challenge is getting the amount of water right. (We have instructional videos with an article for the U-V10 and Lot-O-Tumblers - please check them out. We take special effort to show you how to get the moisture level right.)
There should be just enough water in the barrel to keep the rocks wet as mud accumulates during the run. We check our vibratory tumbler a couple times a day and add a couple tablespoons of water as needed. The amount of water needed depends upon the size and shape of the rocks and how fast they cut. A bowl full of tiny rocks takes a bit more water than large rocks because they have a higher surface area. And, fast-cutting rocks require more water than slow-cutting rocks because you need enough water in the barrel to keep the mud thin enough for a nice tumbling action.
When you are first learning to run a vibratory tumbler, check it several times per day until you learn how things work. Once you understand, then the only time you need to pay extra attention is when you are tumbling a new type of material.
Happy tumbling!
