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Eligible for Return, Refund or Replacement within 30 days of receipt
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Eligible for Return, Refund or Replacement within 30 days of receipt
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Thumler's Tumbler Rotary Rock Tumbler

3.9 3.9 out of 5 stars 11 ratings
$227.92
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Purchase options and add-ons

Brand Thumler's Tumbler
Material Brass
Style Modern
Shape Round
Pattern Solid

About this item

  • One model A-r2 #115 rock tumbler
  • Two rubber tumbling barrels that holds 6 lbs of rocks
  • Each barrel interior measures 4 1/4" diameter x 4" deep (107 x 101 mm)
  • Instruction booklet "A Guide for Rock Polishers"
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Thumler's Tumbler Rotary Rock Tumbler
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Product Description

Thumler's A-R2 Rotary Tumbler For Tumbling Rocks This is a new rotary tumbler. Rotary tumblers polish rocks, stones, coins, clean cartridges, polish brass and other metals. This is extensively used by serious hobbyists, laboratories, schools and industry for an unlimited variety of tumbling and mixing operations. It can polish rocks and stones to reveal their long hidden natural beauty. It runs 110V, 60Hz. This tumbler is a great hobby for beginners and great tool for experts. It has a fan cooled motor and is overload protected. It is made in the U.S.A. You receive: One model A-R2 #115 rock tumbler Two rubber tumbling barrels that holds 6 lbs of rocks Each barrel interior measures 4 1/4" diameter x 4" deep (107 x 101 mm) Instruction booklet "A Guide for Rock Polishers"

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Thumler's Tumbler Rotary Rock Tumbler

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Customer reviews

3.9 out of 5 stars
3.9 out of 5
11 global ratings
Sad state of USA basic manufacturing quality control
3 Stars
Sad state of USA basic manufacturing quality control
Pro's: this Amazon seller was 10$ less than others; simple; good hard rubber tumbler containers with flats inside for effective tumbling action - and a simple reliable seal design; Made in USA.Con's: lack of pride in quality control - ink pad print was blurred & incomplete (seriously, wipe the wet ink off and print it again); motor has a low-quality loosely crimped together housing (paint is chipped around crimps); motor fan does not circulate much air and just running constant with little load in the tumbler containers at room temperature (70degF), the motor case gets to 158degF (should have a "Caution HOT Surface" label at that point); motor cord wiring was separated well beyond the strain relief; no rubber feet results in loud vibration and damage to table surface over running time (recommend 4 stick-on rubber cone feet 20mm dia x 22.5mm height, they work very nicely).I recommend a little Tri-Flow teflon lube for the plastic sleeve bearings. Once the bearings are lubed and cone rubber feet installed, the unit is comparatively much quieter.
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Top reviews from the United States

Stewart
5.0 out of 5 stars Buy it
Reviewed in the United States on February 17, 2020
Verified Purchase
High quality piecenof equipment backed by one of the best names in tumblers.
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BrooX
3.0 out of 5 stars Sad state of USA basic manufacturing quality control
Reviewed in the United States on April 28, 2021
Verified Purchase
Pro's: this Amazon seller was 10$ less than others; simple; good hard rubber tumbler containers with flats inside for effective tumbling action - and a simple reliable seal design; Made in USA.

Con's: lack of pride in quality control - ink pad print was blurred & incomplete (seriously, wipe the wet ink off and print it again); motor has a low-quality loosely crimped together housing (paint is chipped around crimps); motor fan does not circulate much air and just running constant with little load in the tumbler containers at room temperature (70degF), the motor case gets to 158degF (should have a "Caution HOT Surface" label at that point); motor cord wiring was separated well beyond the strain relief; no rubber feet results in loud vibration and damage to table surface over running time (recommend 4 stick-on rubber cone feet 20mm dia x 22.5mm height, they work very nicely).

I recommend a little Tri-Flow teflon lube for the plastic sleeve bearings. Once the bearings are lubed and cone rubber feet installed, the unit is comparatively much quieter.
Customer image
BrooX
3.0 out of 5 stars Sad state of USA basic manufacturing quality control
Reviewed in the United States on April 28, 2021
Pro's: this Amazon seller was 10$ less than others; simple; good hard rubber tumbler containers with flats inside for effective tumbling action - and a simple reliable seal design; Made in USA.

Con's: lack of pride in quality control - ink pad print was blurred & incomplete (seriously, wipe the wet ink off and print it again); motor has a low-quality loosely crimped together housing (paint is chipped around crimps); motor fan does not circulate much air and just running constant with little load in the tumbler containers at room temperature (70degF), the motor case gets to 158degF (should have a "Caution HOT Surface" label at that point); motor cord wiring was separated well beyond the strain relief; no rubber feet results in loud vibration and damage to table surface over running time (recommend 4 stick-on rubber cone feet 20mm dia x 22.5mm height, they work very nicely).

I recommend a little Tri-Flow teflon lube for the plastic sleeve bearings. Once the bearings are lubed and cone rubber feet installed, the unit is comparatively much quieter.
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2 people found this helpful
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Tim Schaefer
1.0 out of 5 stars The motor runs extremely hot, but the only reason I won't return it is because of the rubber tubs.
Reviewed in the United States on May 30, 2021
Verified Purchase
Love the tubs, but the construction of this machine for $200 is ridiculous. The motor runs hot all the time, I cannot trust this machine to be left unattended for fear of fire hazard. The tubs are really good so they are now inventory for another tumbler from somebody else.
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Lord Erik
5.0 out of 5 stars Wife has been using this for years and is pleased with.
Reviewed in the United States on September 24, 2023
My wife is a rockhound and science teacher. She has always bought inexpensive rock tumblers from walmart or other junk retail stores. These rock tumblers have always have been for kids who will play their tumblers one or twice and nevermore. They are cheap, loud, and too small.

I ordered her Thumler's Tumbler model A-R2 about eight years ago. She uses it often and it still works years later. She is currently running it for her new collections from our trip to Michigan's UP and the Middle East. It is low maintenance. It is quiet. It has a good capacity with its two side-by-side rubber drums.

Things to know when buying this:
1) You have to oil the rollers with machine oil. You have to oil the motor with electric motor oil. I use 3 in 1 brand oil for both. (As in I have a standard black can for the rollers and 3 in 1 blue can electric motor oil for the two oil ports on the little motor.) You just need a drop of oil under each roller. You just need a drop or two of electric motor oil for each port on the motor. Do not use machine oil in the electric motor.

2) You have to really clean the drums after use including when changing the grits. My wife has missed this a couple of times. Leaving grit on the outside surfaces of the rubber drums chew up the drums and the rollers. Leaving grit on the lid or the groove the lid snaps into will cause the drums to leak and chew up the seal for the lid. Clean the drums, inside and out, very thoroughly. If the grit can polish granite , it certainly can devour the rubber of the tumblr. Get all of the "rock grit mud" out of the drums and off all surface after use or when changing grits. When kept clean, however, I have had no problems with leaking or the rubber bearing surfaces or drums eating itself. Do not let kids pour the spent grit mud down your sink drains.

3) Unlike the junk tumblers in mall stores or retail chains, this tumbler is quiet. Ours runs dutifully on the floor near the dining room table. When we eat meals or play board games it goes unnoticed. (We keep it there so I remember to oil it and I can keep on eye if my wife let the seals leak.)

4) I suggest not getting this for a kid for birthdays or Christmas as a first rock tumbler. Get a junk one first, burn it up, and run it to fail. However, if the hobby sticks then this tumbler is a great one as a "first real rock tumbler." Thumler has several other sizes too. Likewise for a school teacher or part-time hobbyist like my wife, this two-drum A-R2 is a perfect entry-to-middle level tumbler. If she keeps up with it, I might upgrade her to the larger capacity Thumler Tumbler ( A-R6, A-R12, or B model--Check their website for more information).

5) If you only have enough rocks to fill one drum. You will need to find something to fill and run the other drum. We usually wait until another rockhounding trip. There is media that be bought to fill the idle drum to ensure the weight balances and keeps the drums from wandering around. Like I said, we merely just go on another trip--We live in New England and there are rocks everywhere. We just find an excuse to fill the other drum.

In closing: This is a good reliable rock tumbler that isn't noisy. I'm pleased with its performance. It is good for a kid with a demonstrated interest in hobby. The tumbler is ideals for part-time hobbies or teachers. Remember to oil it properly and keep the wearing surfaces clean and free of grit and this tumbler will last years.
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Snuffy18
3.0 out of 5 stars Gets the job done.
Reviewed in the United States on October 1, 2018
Verified Purchase
I was a bit taken aback by the light, simple construction. My guess is you could build one for about $15. But the watertight containers were something else again. They are indeed watertight and made of a very tough sturdy rubber that would probably outlast the rest of the machine ten times over. Probably the whole machine is worthwhile to buy just to get the containers.
4 people found this helpful
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