• K4 Ultra Quiet Rock Tumbler Kit, Professional Brushless Motor & Double-Barrel for 7 LBS Capacity, 6X Noise Cancelling Rock Polisher with All Accessories, Ideal Gift for Adults
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    K4 Ultra Quiet Rock Tumbler Kit, Professional Brushless Motor & Double-Barrel for 7 LBS Capacity, 6X Noise Cancelling Rock Polisher with All Accessories, Ideal Gift for Adults
    K4 Ultra Quiet Rock Tumbler Kit, Professional Brushless Motor & Double-Barrel for 7 LBS Capacity, 6X Noise Cancelling Rock Polisher with All Accessories, Ideal Gift for Adults - Image 2
    K4 Ultra Quiet Rock Tumbler Kit, Professional Brushless Motor & Double-Barrel for 7 LBS Capacity, 6X Noise Cancelling Rock Polisher with All Accessories, Ideal Gift for Adults - Image 3
    K4 Ultra Quiet Rock Tumbler Kit, Professional Brushless Motor & Double-Barrel for 7 LBS Capacity, 6X Noise Cancelling Rock Polisher with All Accessories, Ideal Gift for Adults - Image 4
    K4 Ultra Quiet Rock Tumbler Kit, Professional Brushless Motor & Double-Barrel for 7 LBS Capacity, 6X Noise Cancelling Rock Polisher with All Accessories, Ideal Gift for Adults - Image 5
    K4 Ultra Quiet Rock Tumbler Kit, Professional Brushless Motor & Double-Barrel for 7 LBS Capacity, 6X Noise Cancelling Rock Polisher with All Accessories, Ideal Gift for Adults - Image 6
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    • Cutting-Edge Brushless Motor for Superior Performance: The KomeStone Ultra Quiet Rock Tumbler features a revolutionary brushless motor, providing efficient, and smooth tumbling action. As the first and only rock tumbler building with brushless motor and sounproof cover on the market, it ensures optimal tumling results for your rocks and gemstones.
    • 7-LB Capacity & 6X Quieter Operation: With its dual barrel design and 7-lb capacity, this tumbler allows you to tumble as much as 7 lbs of rock at once, making it ideal for large projects. The noise-reduction cover reduces sound by up to 6X, providing a quieter, more enjoyable tumbling experience—perfect for indoor use or in noise-sensitive environments.
    • Exclusive Precision Polishing with 4-Speed Controls: Achieve perfectly polished stones with 4-speed controls for precise tumbling. The 9-day timer with automatic shutoff and memory function ensures consistent results, while the Polishing Cycle Record Button helps you track each cycle for more efficient management of your tumbling process.
    • Everything For Rocks Tumbling Included: Everything you need to get started with rock tumbling is included in the box: two 3.5-lb capacity rubber barrels, 2 lbs of rough gemstones in 9 different varieties, 2 durable belts, 8 bags of polishing grit, a sifter, mesh strainer, ceramic pellets, jewelry fastenings, and a step-by-step tutorial guide. It’s so simple to use that even a 6-year-old can start tumbling right away!
    • Dedicated Customer Support & Lifetime Guarantee: KomeStone is committed to providing exceptional customer service and support. Our lifetime troubleshooting and accessory replacements ensure your satisfaction, making us a trusted name in rock tumblers. If you have any issues, our U.S.-based customer service team is always here to help.

    Original price was: $199.99.Current price is: $159.99.

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    Out of stock

    Description

    KomeStone Double-Barrel K4 Rock Tumbler with Brushless Motor & Noise Cancelling Technology

    This is the brand flagship store owned by KomeStone, as the original manufacture and brand outlet, KomeStone brand owns the designs of it’s all rock tumbler models.

    KomeStone provides the top-of-line manufacturer advanced professional rock tumbler kits, featuring with all functions and accessories you need to master rocks tumbling and polishing.

    The KomeStone K4 Double-Barrel Rock Tumbler is the first and only tumbler equipped with a cutting-edge brushless motor and soundproof cover, providing ultra-quiet operation and a longer lifespan. This innovative design ensures smoother, quieter tumbling, making it ideal for rock collectors, hobbyists, and professionals who require consistent performance.

    We offer lifetime troubleshooting support and free replacement parts for all accessories. For more information and to explore the full range of our double-barrel rock tumbler kit, please visit our official KomeStone flagship store.

    Thank you for your contribution!

    Important：Reach out to us immediately after placing your order and we’ll provide you with a bag of tools to replace belts or as a backup. Plus, you’ll also receive an extra bag of rocks to get more practice right away!

    Notice: If there is any part missing, please kind take a moment to reach out for a replacement or the compensation.

    Should any concerns arise, rest assured, we’re dedicated to swift solutions. Instead of frustration, kindly connect with us for assistance.

    Rock tumblers transform raw rocks into stunning gems for jewelry, crafting, and collections. To achieve an exceptional shine, use high-quality grits, soap water, mineral oil, and follow the precise tumbling steps.

    If you need tips for getting smoother rocks, feel free to reach out to our team—we’re here to help! Remember, practice makes perfect.

    FAQs About KomeStone Rock Tumbler Kit

    1. How Much Weight Can Each Barrel Hold?

    • Each barrel can hold up to 3.5 lbs of rocks, so with both barrels, you can tumble a total of 7 lbs. Including water, polishing powder, ceramic pellets, and other additives, each barrel can handle up to 7 lbs, and together, both barrels can support a total weight of 14 lbs.

    2. Will the Belt Break?

    • The timing belts are made from rubber and fiberglass (9 strands), making them strong and resistant to breakage. These belts are designed to last and won’t slip easily. While they may show some wear over time, it won’t affect their performance. Each tumbler comes with 2 belts—one installed and one as a backup. If your belt ever breaks, just reach out to us, and we’ll send you the replacement at no cost.

    3. Encountering a hiccup with your rock tumbler?

    • First, consult our FAQs in the instruction book or on this page. For product concerns, connect with us directly. Our dedication to unparalleled service ensures swift resolutions.

    Your satisfaction is paramount. Trust that we’re dedicated to elevating your experience and swiftly addressing every matter.

    Customer Reviews

    Rated 5 out of 5

    "This rock tumbling kit from KomeStone has been so much fun! It comes with everything that you need to get started right off the bat, including a variety of neat stones."

    Cody Bartley
    Rated 5 out of 5

    “I have now bought two more of this rock tumbler. So far it is reliable and durable under pretty frequent use. I tumbled glass and pottery and it does the job wonderfully helping me make jewelry quality items from bottles and plates.”

    Paul E. Short

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