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Your cart is empty.A Few Hints for Longer Rock Tumbler Life Now that you are actively shopping to replace a broken, stretched or otherwise worn rock tumbler belt-your choice of our replacement belts is indeed a good One .Replacing a belt is certainly a lot cheaper than buying a new tumbler! However, please understand that early or premature breakage of your tumbler's current belt may be indicative or a "flag" telling you that other issues may be at play here (other than just a belt that broke)..If available, please refer to your tumbler's original manual. Review the important operational and maintenance information. As your tumbler (& it's belt) up to now may have been running well-there is now evidently some new checks and/or maintenance that are recommended. Examples could be: Is your tumbling load proper and not too heavy? A Heavy load will stall the shafts & pulleys eventually breaking the belt..Insure that the load does not exceed manufacturer's specifications. HINT: a 3 lb tumbler should have a load that with both it's load (rocks, water & grit) and the barrel itself measured should not exceed 3 lbs. Check and clean as necessary the outer surfaces of the barrel. Your barrel needs to be slip-free-clean & dry. Was your belt properly tensioned? The belt needs to move freely without binding or without too much excess play. Are the belt's pulleys aligned and moving freely and moving the shafts equally as well? A belt should be positioned on the pulleys with a reasonable amount of "slack" as well. Are the shafts moving smoothly, do the bearings need lubrication? Do you feel or hear any "grinding" or roughness when turning the shafts? Do the shafts' surfaces need cleaning? Remove the belt (motor) housing and (carefully)allow tumbler to run while you watch these various mechanical movements. Everything should be freely and smoothing moving-silently. With proper vigilance, maintenance and due diligence a tumbler can last & run for decades.
troy
2025-08-17 16:45:52
Works great
Robert Shelby
2025-07-27 14:40:04
Good fit.
Dorothy McKee
2025-06-17 16:55:00
Just to let you know at Amazon, the product did not arrive on the day promised unless it came after 10 PM and maybe it did. It is what I ordered and exactly as stated in description.
Narles
2025-05-19 21:28:14
I bought these belts to replace the original belts that came with the Hobby Tumbler. We had gone through the two belts that came with the tumbler, both which had stretched out, begun to disintegrate, and constantly would fall off during use. These new belts are thicker and more durable and fit the hobby model perfectly.
larry c
2025-05-11 21:18:40
the 1st belt has worked well so far and have held up through 5 loads
Arrr
2025-04-08 09:47:11
It's the right size for the National Geographic professional tumbler. Shipping was fast and it took all of 30 seconds to put the new belt on. Tumbler seems to work the same as it did with the original belt.
TL
2025-03-07 16:16:22
These replacement drive belts for National Geographic Professional Rock Tumbler did not fit my National Geographic Professional Rock Tumbler. Belts were smaller and wider than the drive belts that came with my rock tumbler.
Jaded
2025-01-27 16:03:11
I have tried many different brands of belts, looking for something that is long lasting. So far, they are all the same. Just buy the cheap ones and keep replacing them.
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