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6 Lb Rotary Dual Drum Rock Tumbler Lapidary Polisher

3.8 out of 5 stars 118 customer reviews
| 41 answered questions

Price: $59.29 + $9.17 shipping
Only 7 left in stock.
Ships from and sold by Michaelsons.
  • Two generous 3 lb. capacity drums
  • Rubber barrels for quieter operation
  • Motor: 120 volt, fan cooled, V-belt driven
  • Overall dimensions: 14-3/4" L x 6-1/2" W x 4-3/4" H
13 new from $59.29
This item’s packaging will indicate what is inside and cannot be hidden.

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$59.29 + $9.17 shipping Only 7 left in stock. Ships from and sold by Michaelsons.

Frequently Bought Together

  • 6 Lb Rotary Dual Drum Rock Tumbler Lapidary Polisher
  • +
  • Tru-SQuare Rock Tumbling Grit, No 304
  • +
  • Madagascar Minerals Labradorite 12 Stones Mix, 2lb
Total price: $106.27
Buy the selected items together

Product Information

Product Dimensions 16.3 x 8.5 x 8.3 inches
Shipping Weight 9.3 pounds (View shipping rates and policies)
ASIN B0011GGL5K
Customer Reviews
3.8 out of 5 stars 118 customer reviews

3.8 out of 5 stars
Best Sellers Rank #14,333 in arts-crafts
#33 in Arts, Crafts & Sewing > Beading & Jewelry Making > Polishing & Buffing

Warranty & Support

Product Warranty: For warranty information about this product, please click here

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Customer Reviews

Top Customer Reviews

These seem like a great bargain from Harbor Freight (and Amazon), but like all HF electic tools, they are substandard and essentially disposible -- get the 2 yr HF warranty for WHEN they fail so you can return/replace them.

Some have complained about losing belts every few days, which you can fix by a couple of simple adjustments. You can make the pully belt last by loosening and aligning the pulleys so that the belt is exactly aligned between them and then adjusting the belt tension to "almost" too loose, however the real problem with this product is that when tumbling normally, the dual drums like to move toward the edge of the tumbler and grind into the plastic tabs that are supposed to prevent this. This continuous friction causes the black plastic tabs to decay into nothing within a very short number of days. Then you get metal on metal grinding as the drum rotates against the metal frame and start self-destructing. Also plastic on the rollers starts to "shift" the other way and gets pushed into the bearings because the drum cannot move any further. Imminent failure...

Basically these tumblers self-destruct from just spinning. I purchased two of them and both ground down the plastic tabs, one in just a week. If I just run ONE drum instead of two drums, the one drum tends to migrate to the center of the rollers and not contact the edges/tabs. That's not great since the whole point was to tumble with both drums at once.

I returned one HF Dual Drum Tumbler already, just waiting for the other one to finally fail as well. :(

I'm replacing them with "Tumble-Bee Tumblers" dual-drum & single larger drum tumblers which have a better belt system and a well designed drum guide -- the knobs on the drums ride in a U-shaped metal slots that guide them. You could also step up to Lortone or Thumblers competing products. Spend a bit more and get a better product that won't fail very quickly and waste your time.
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Used mainly for shaping and polishing rocks it can also clean hardware..
I learned from the start to give the unit a quick double check on the pulleys used to operate it, sometimes they are not true..Once adjusted though the belt will last a very (6 months) long time..Thats the only problem with these units..I also found a quick fix with a rubber band when the belt does break..Even a vacuum cleaner belt is a great replacement.

Keep the bushings oiled and it will outlast the thumblers version..

Keep the stones rolling.
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This thing is super squealy. There are two support rods the tumblers spin on.. The rubber insulator on the rod that is turned by the motor ( to turn the barrels ) ground itself off from running. Now there is no rubber insulator on it and the barrels spin a lot. I had to rig it with electric tape. Really a bad design I would not recommend this to anyone
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My daughter has been using the tumbler since 2 days after Christmas 2014. So far it seems to be tumbling away with no problems. We did have to change out a drive belt within the first 24hrs of using. The rock tumbler came with a bag of extra belts. I'm hoping they don't break too often. After we put the belt on, we have had no other problems and it's been tumbling away for 17 days now. One word of caution, the tumbler does move a bit and the directions advise not to place on a table or workbench. This is true. My daughter has hers on our garage floor. Every few days I have to scoot it back closer to the wall because it eventually moves around a bit. It's not excessively loud but it is a rock tumbler and so it's definitely something you will want to place in your garage or somewhere other than inside the house. Also, having dual tumblers is a plus. Waiting 30 days just for a handful a beautiful rocks is brutal. It's best two start tumbling in one tumbler and 2 weeks later, start the 2nd tumbler. That way you're producing beautiful rocks every two weeks instead of once a month.
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The rock polisher / ball mill is about what I expected. Seems reasonably well made, and should do the job. After researching further, should have just purchased from Harbor Freight (it was drop shipped from them) directly and saved some money.
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I own a Lortone 3A Tumbler and wanted the ability to tumble more rocks at once, so I purchased the Chicago Electric/Pneumatic double barrel from a local brick and mortar store. I have not experienced any of the belt or grinding problems noted by other users. The provided manual gives instructions on adjusting the tabs and belts to improve durability. I have had this tumbler going for two weeks straight with no mechanical problems.
The quality of the barrel pieces is lower than Lortone, but since it's half the price, I expected that. The rubber barrel appears to be the same as the one on my Lortone, but the lids are much lower quality. Rubber gasket on the lid is not attached, and you have to be very careful putting it on to not rip the rubber. The lid on the CE barrels also have a slight leak if you do not thoroughly clean it every time. Again, this is all covered in the instructions, so read them. With proper care I think it will be fine, but it cannot take the rough handling of a Lortone.
The reason I did not give it five stars is that it tumbles at a slower place than the Lortone. Since the whole point of tumbling is to get movement, a slower speed will mean longer polishing times. So far it seems to add about a day to each batch of rocks (one harder agate, one softer rhyolitic tuff/wonderstone), compared to Lortone brand.
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