---
product_id: 487338251
title: "KomeStone K1 Pro Brushless Rock Tumbler – Quiet 2.5LB Rotary Rock Polisher for Hobbyists & Collectors with High-Performance Motor, Adjustable Speed, Timer, Memory Function & Full Accessories Included"
brand: "komestone"
price: "VT43652"
currency: VUV
in_stock: true
reviews_count: 13
category: "Kome Stone"
url: https://www.desertcart.vu/products/487338251-komestone-k1-pro-brushless-rock-tumbler-quiet-2-5lb-rotary
store_origin: VU
region: Vanuatu
---

# 9-day programmable timer with 3 speeds Brushless motor - 20,000+ hrs quiet power 2.5 lb extra-large soft rubber barrel KomeStone K1 Pro Brushless Rock Tumbler – Quiet 2.5LB Rotary Rock Polisher for Hobbyists & Collectors with High-Performance Motor, Adjustable Speed, Timer, Memory Function & Full Accessories Included

**Brand:** komestone
**Price:** VT43652
**Availability:** ✅ In Stock

## Summary

> 💎 Turn rough stones into museum-quality gems—quietly, efficiently, professionally.

## Quick Answers

- **What is this?** KomeStone K1 Pro Brushless Rock Tumbler – Quiet 2.5LB Rotary Rock Polisher for Hobbyists & Collectors with High-Performance Motor, Adjustable Speed, Timer, Memory Function & Full Accessories Included by komestone
- **How much does it cost?** VT43652 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/487338251-komestone-k1-pro-brushless-rock-tumbler-quiet-2-5lb-rotary)

## Best For

- komestone enthusiasts

## Why This Product

- Trusted komestone brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Control:** Customize your polishing with a smart LCD featuring a 9-day programmable timer and 3-speed settings for pro-level results.
- • **Silent Powerhouse:** Experience ultra-quiet, brushless motor technology delivering over 20,000 hours of smooth, maintenance-free operation.
- • **Max Batch Capacity:** Polish more stones at once with the extra-large 2.5 lb soft rubber barrel that absorbs impact and reduces noise by 75%.
- • **Complete Starter Kit:** Includes everything you need—rough rocks, 4-stage grit system, ceramic media, extra belts, and a full-color guide to master rock tumbling.
- • **Safe & STEM-Approved:** Certified non-toxic and kid-safe, perfect for educational fun that sparks creativity and geological curiosity in all ages.

## Overview

The K1 Pro Rock Tumbler by KomeStone is a professional-grade polishing kit featuring a brushless motor with 20,000+ hours of quiet operation, a 2.5 lb soft rubber barrel for large batch processing, and a 9-day programmable timer with 3 speeds. It includes a complete 4-stage grit polishing system, ceramic media, and all necessary accessories, making it ideal for hobbyists, collectors, and STEM learners. Certified non-toxic and family-friendly, it offers durable, mess-free tumbling with a leak-proof lid and comes backed by a 2-year warranty and 90-day satisfaction guarantee.

## Description

Product description This is the brand flagship store owned by KomeStone, the original manufacturer and official outlet for all KomeStone-designed rock tumblers. As a leading innovator in this category, KomeStone has been consistently recognized for delivering advanced, dependable, and high-performance rock tumbling solutions. KomeStone provides top-of-the-line, manufacturer-grade professional rock tumbler kits, equipped with all functions and accessories needed to master rock tumbling and polishing. The KomeStone K1 Pro features our cutting-edge brushless motor design — the first rock tumbler built with this technology — offering more than 20,000 hours of work time and a lifespan beyond 10 years. We understand that rock tumbling is more than a hobby — it’s an investment. That’s why we stand behind every tumbler we sell with lifelong support, including replacement parts and technical guidance. Even after your warran*ty expires, we won’t disappear. You can count on us to keep your machine running smoothly for years to come. Your trust means everything to us. We’re here — not just to sell, but to support. Always. Trusted Choice in Rock Tumbling — Recognized for Quality & Performance Bring Every Stone to Life — Your Next Discovery Awaits Each stone hides a story waiting to be revealed. The moment when rough rocks turn smooth and begin to shine is pure magic — a reward for your patience, curiosity, and creativity. Watching your collection come to life is not just satisfying — it’s inspiring. Rock tumbling isn’t just about polishing stones — it’s about the process of discovery. Many families tell us it has become a shared hobby that helps children build focus, patience, and an appreciation for hands-on learning. Every polished gem becomes a reminder that beautiful things take time and care. To keep your adventure going, explore our refill grit sets — available in 4 lb, 6 lb (with ceramic media), and 10 lb (with ceramic & plastic pellets) — perfect for larger projects or long-term tumbling. And for that final, glassy brilliance, try our 8000 / 12000 grit aluminum oxide polish in your next batch. Thank you for your contribution! Welcome to a world of exquisite craftsmanship! Share your captivating stone creations with us, and we'll proudly showcase them across our desertcart details page and vibrant social media platforms. Your talent deserves a spotlight. Should any concerns arise, rest assured, we're dedicated to swift solutions. Instead of frustration, kindly connect with us for assistance. You may not know: Rock tumblers transform raw rocks into stunning gems for jewelry, crafting, and collections. For an exceptional shine, explore the art of polishing with high-quality grits, soap water, mineral oil, and meticulous steps. Practice perfects the process. Dig Deeper Is operating the rock tumbler effortless? Absolutely. Inside your package, discover a full-color Instruction book, guiding you through every step. It's so clear, even a 4-year-old can navigate it. Will the belts break? Currently, all of our rock tumblers come with PU belts, which is a new and upgraded, more durable option. Generally, these belts do not break, although special circumstances may occur. However, if the belt breaks, please replace it with one of the PU belts from the pack. After placing your order or receiving the product, please email to our after-sales service center to receive the additional 5 spare belts. You can find the specific after-sales email on the main image or in the manual. Rest assured, for any products issues, please reach out to us, and we will handle them properly. We are in the process of replacing all belts with PU belts, meaning that future belts are unlikely to break. 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. Ensure you include the polishing grits kit in your cart alongside this rock tumbler – together, they create the ideal combination for an impeccable finish, do not forget to add it into your cart. Your satisfaction is paramount. Trust that we're dedicated to elevating your experience and swiftly addressing every matter.

Review: Great for tumbling small parts and hardware - I end up with a lot of old hardware and small bits and pieces that come from garage sales, cannibalized equipment, etc. I also restore old tools, work on old cars and motorcycles, etc. I wanted a small tumbler so that I could drop a handful of fasteners or small parts in, let it run for a while, and come back to clean metal. This was a complete shot in the dark. I usually soak parts in vinegar or phosphoric acid when they're rusty, and that works well enough that I wasn't sure if tumbling would work better or be less hassle. On the one hand, there's no acid to neutralize and not much pre-cleaning that has to be done. On the other, you have to deal with abrasive grit, which can get everywhere (and I mean EVERYWHERE). Since I didn't know if I'd like this approach, I didn't want to risk a lot of money on a tumbler. I bought this kit because it was inexpensive and had decent reviews. If this ended up being an essential part of my workflow, I decided that I could always buy something bigger and/or better in the future. So far, this tumbler has been awesome. The first batch of parts that I threw in was a rusty mess of hardware that I'd picked up at a garage sale. This stuff probably hadn't seen the light of day in decades and had a pretty solid layer of rust on it. I skipped the included media and instead filled the tumbler drum with medium (70 grit) aluminum oxide, which is a pretty aggressive grit used for media blasting. I'm not a fan of membrane buttons or plastic construction on most things because I haven't found it to be particularly durable, and this tumbler has both. It certainly doesn't look heavy duty and I didn't expect much out of it. In reality, I didn't even think it would have the power to turn a drum that was chock-full of steel hardware and abrasive, but I gave it a shot. I was pleasantly surprised that the drum started turning effortlessly even at the highest speed. Most of the hardware had settled to one side so the load was imbalanced and the tumbler started to walk across my workbench, but I propped it in place with a heavy box and let it run. After about an hour I checked on the hardware and almost all the rust was gone. I dumped the contents of the drum through a strainer, which made separating the hardware a breeze. What was left was almost completely clean steel, certainly clean enough to use once I blew the last of the grit away with an air hose. I ran a few more handfuls of hardware through this machine with the same results. I also ran a really cheap set of rusty no-name sockets that I bought at (yet another) yard sale. I keep junk sockets around in case I need to modify them for odd sizes or special uses, and these followed me home to be added to the "just in case" pile. The sockets came out fairly clean. The chrome plating is peeling off and while the tumbler knocked off any rust and loose bits of plating, it didn't take everything down to bare metal. That's fine, however, because it did most of the dirty work for me while I was doing something else. I can always give one of these sacrificial sockets a once-over on the wire wheel if I need to weld or modify it, but at least I'm starting with something relatively clean and rust-free. If you tumble steel parts or hardware, just remember that what comes out will be prone to re-rusting pretty quickly. This is because you've abraded off any protective oxide layers that were on the metal. It's a good idea to blow off any remaining media and then oil the metal to protect it. Also be aware that touching the raw metal with bare skin can cause it to rust faster, as the salts and acids in your perspiration all cause oxidation. I usually wear nitrile gloves in the garage so this isn't much of a problem for me. When I pulled this dainty little thing out of the box, I figured it would be good for a couple of uses at best before the motor burned out or something broke. So far I'm pleasantly surprised. It's put in a few hours of work with no complaint and nothing broken, and it does a good job of removing light to moderate rust. The aluminum oxide is a worthwhile investment (I think I paid $20 for 25 pounds or so, and I could've gotten a way better deal if I'd shopped around). Long term durability is still a question of course so we'll see how that goes, but so far this thing punches above its weight.
Review: So much fun! - This is a great little rock tumbler! I have run quite a few batches through this thing and it's always fun to see the shiny results after the last grit. So far it works as it should for me with no issues!

## Features

- The Original Brushless Rock Tumbler — Pioneered By KomeStone — KomeStone brought brushless motor technology to rock tumblers first — the K1 Pro is where it started. The professional-grade brushless motor delivers 20,000+ hours of operation, a 60% longer lifespan than traditional brushed motors, with less heat, less vibration, and quieter performance from day one.
- Professional-Grade Controls — Smart LCD, 9-Day Timer & Memory Function — Features a smart LCD display, 9-day programmable timer with automatic shutoff, 3-speed precision controls, and a memory function that resumes your cycle after any power interruption. Military-grade thickened rubber barrel adds extra durability and noise reduction — built for professional hobbyists and serious collectors who demand more from every batch.
- 2.5LB Large Capacity — Polish More, Faster — The extra-large 2.5LB rubber barrel lets you polish 2.5× more rocks per batch than standard 1LB tumblers. Ideal for dedicated collectors and gem enthusiasts processing precious agates, premium jasper, crystals, rough gemstones, or sea glass. The smoother brushless rotation helps protect delicate materials while maximizing polishing consistency and batch efficiency.
- Complete Pro Kit — Everything Included For Day One — Includes the K1 Pro tumbler, 2.5LB rubber barrel, 1LB rough rocks (9 types), 4 polishing grits, ceramic media, sifter, jewelry fastenings, 2 extra belts, and a full-color illustrated guidebook. Unbox, load, and start your first professional-grade polishing cycle immediately.
- Advanced 4-Stage System + Pro Polishing Techniques → gem-quality shine — Includes a complete Advanced 4-Stage Grit System (60/120/150/1200) with precision ceramic media and a leak-proof stainless-steel lid. Our exclusive Pro Polishing Techniques guidebook covers advanced methods to help you achieve gem-quality shine from every batch.
- Easy Maintenance — User-Replaceable Drive Belt — Combined with our brushless motor, this user-replaceable belt system keeps your professional station running at peak performance year after year. Designed for hobbyists and collectors who want reliable long-term performance from every polishing cycle.
- 𝟗𝟎-𝐃𝐚𝐲 𝐌𝐨𝐧𝐞𝐲-𝐁𝐚𝐜𝐤 𝐆𝐮𝐚𝐫𝐚𝐧𝐭𝐞𝐞 & 𝟏-𝐘𝐞𝐚𝐫 𝐖𝐚𝐫𝐫𝐚𝐧𝐭𝐲: 𝐑𝐢𝐬𝐤-𝐅𝐫𝐞𝐞 𝐏𝐮𝐫𝐜𝐡𝐚𝐬𝐞 — Your K1 Pro is backed by a 90-day satisfaction guarantee and a 1-year warranty. Our US-based customer service team provides 24/7 hassle-free replacement or refund support — shop with complete confidence.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B69CK2VG |
| Age Range Description | 13 years and up |
| Battery Description | No batteries required |
| Best Sellers Rank | #10,710 in Toys & Games ( See Top 100 in Toys & Games ) #3 in Kids' Rock Tumblers |
| Brand Name | KomeStone |
| Customer Reviews | 4.4 out of 5 stars 3,707 Reviews |
| Educational Objective | Creative Skills |
| Included Components | 1 pound of rocks & 4 bages of polishing grits & ceramic pellets, 1 rock tumbler base & 1 rubber barresl, 2 PU belts & user instructions, jewelry fastenings & adaptor & screwdriver & mesh strainer |
| Is Assembly Required | No |
| Item Dimensions | 11.22 x 9.02 x 5.17 inches |
| Item Type Name | Rock Tumbler |
| Item Weight | 2.5 Pounds |
| Manufacturer | KomeStone |
| Manufacturer Maximum Age (MONTHS) | 1200.0 |
| Manufacturer Minimum Age (MONTHS) | 156.0 |
| Manufacturer Part Number | CA-KS0613RT14 |
| Manufacturer Warranty Description | 2-Year Warranty for free exchange against manufacturing defects |
| Material Type | Brushless motor, Top quality of stainless steel, Tyre grade rubber, 𝐂𝐏𝐒𝐈𝐀 & 𝐂𝐏𝐂 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐞𝐝 |
| Model Number | K1 Pro |
| Set Name | K1 Pro |
| Size | 11.3 x 9.17 x 5.87 inches |
| Theme | Geology |
| Unit Count | 1.0 Count |

## Images

![KomeStone K1 Pro Brushless Rock Tumbler – Quiet 2.5LB Rotary Rock Polisher for Hobbyists & Collectors with High-Performance Motor, Adjustable Speed, Timer, Memory Function & Full Accessories Included - Image 1](https://m.media-amazon.com/images/I/81WpuUctItL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great for tumbling small parts and hardware
*by Z***L on October 27, 2025*

I end up with a lot of old hardware and small bits and pieces that come from garage sales, cannibalized equipment, etc. I also restore old tools, work on old cars and motorcycles, etc. I wanted a small tumbler so that I could drop a handful of fasteners or small parts in, let it run for a while, and come back to clean metal. This was a complete shot in the dark. I usually soak parts in vinegar or phosphoric acid when they're rusty, and that works well enough that I wasn't sure if tumbling would work better or be less hassle. On the one hand, there's no acid to neutralize and not much pre-cleaning that has to be done. On the other, you have to deal with abrasive grit, which can get everywhere (and I mean EVERYWHERE). Since I didn't know if I'd like this approach, I didn't want to risk a lot of money on a tumbler. I bought this kit because it was inexpensive and had decent reviews. If this ended up being an essential part of my workflow, I decided that I could always buy something bigger and/or better in the future. So far, this tumbler has been awesome. The first batch of parts that I threw in was a rusty mess of hardware that I'd picked up at a garage sale. This stuff probably hadn't seen the light of day in decades and had a pretty solid layer of rust on it. I skipped the included media and instead filled the tumbler drum with medium (70 grit) aluminum oxide, which is a pretty aggressive grit used for media blasting. I'm not a fan of membrane buttons or plastic construction on most things because I haven't found it to be particularly durable, and this tumbler has both. It certainly doesn't look heavy duty and I didn't expect much out of it. In reality, I didn't even think it would have the power to turn a drum that was chock-full of steel hardware and abrasive, but I gave it a shot. I was pleasantly surprised that the drum started turning effortlessly even at the highest speed. Most of the hardware had settled to one side so the load was imbalanced and the tumbler started to walk across my workbench, but I propped it in place with a heavy box and let it run. After about an hour I checked on the hardware and almost all the rust was gone. I dumped the contents of the drum through a strainer, which made separating the hardware a breeze. What was left was almost completely clean steel, certainly clean enough to use once I blew the last of the grit away with an air hose. I ran a few more handfuls of hardware through this machine with the same results. I also ran a really cheap set of rusty no-name sockets that I bought at (yet another) yard sale. I keep junk sockets around in case I need to modify them for odd sizes or special uses, and these followed me home to be added to the "just in case" pile. The sockets came out fairly clean. The chrome plating is peeling off and while the tumbler knocked off any rust and loose bits of plating, it didn't take everything down to bare metal. That's fine, however, because it did most of the dirty work for me while I was doing something else. I can always give one of these sacrificial sockets a once-over on the wire wheel if I need to weld or modify it, but at least I'm starting with something relatively clean and rust-free. If you tumble steel parts or hardware, just remember that what comes out will be prone to re-rusting pretty quickly. This is because you've abraded off any protective oxide layers that were on the metal. It's a good idea to blow off any remaining media and then oil the metal to protect it. Also be aware that touching the raw metal with bare skin can cause it to rust faster, as the salts and acids in your perspiration all cause oxidation. I usually wear nitrile gloves in the garage so this isn't much of a problem for me. When I pulled this dainty little thing out of the box, I figured it would be good for a couple of uses at best before the motor burned out or something broke. So far I'm pleasantly surprised. It's put in a few hours of work with no complaint and nothing broken, and it does a good job of removing light to moderate rust. The aluminum oxide is a worthwhile investment (I think I paid $20 for 25 pounds or so, and I could've gotten a way better deal if I'd shopped around). Long term durability is still a question of course so we'll see how that goes, but so far this thing punches above its weight.

### ⭐⭐⭐⭐⭐ So much fun!
*by A***Y on April 30, 2026*

This is a great little rock tumbler! I have run quite a few batches through this thing and it's always fun to see the shiny results after the last grit. So far it works as it should for me with no issues!

### ⭐⭐⭐⭐⭐ Amazing customer service, great product, exactly what I wanted.
*by B***N on October 13, 2025*

The tumbler was exactly what I was hoping for to have fun tumbling the stones that my son and I mine together. The stones that came with the tumbler were very nice as well. The instructions were very clear and easy to follow, along with the equipment actually being easy, but seemingly good quality. The drum seems well designed with good durability, I have not had any leaks. For some reason, the tumbler base malfunctioned after about 2 weeks of use, where the motor stopped working. I reached out to the manufacturer and I'm not exaggerating when I say they were top notch in their response. The reply was very fast, with clear questions and instructions on what they needed from me. I was busy for a few days and took some time to send them my info, and they checked up to make sure I didn't need any help getting it to them. They shipped a new base within 24 hours and it arrived next day shipping. Once I received it, they were very concerned to make sure I received it, the new one was working properly, and I was 100% satisfied with how they resolved the issue. They sent me an email every few days to ensure I didn't have any issues until I got back with them (I wanted to let it run for a week cycle to make sure it was good to go). In addition to the new base, they issued me an additional one year warranty on the replacement. I'm not typically one to go into in depth reviews, but they honestly deserve it, even just for the amazing and friendly customer service, then a very nice tumbler for hobby use. I was already debating possibly upgrading to the larger one in a few months, and I am sold on it now.I will be buying my extra grit from them after this experience, instead of browsing for other sellers. I know that if I'm not satisfied, they will go above and beyond to change that.

## Frequently Bought Together

- KomeStone K1 Pro Professional Cutting-Edge Brushless Motor Advanced Rock Tumbler Polisher Kit, Extra Large 2.5Lb Barrel with 3-Speed Motor 9-Day Timer, 6 Belts, Rough Gemstones, 4 Polishing Grits etc.
- Rock Tumbler Polishing Grits and Ceramic Tumbling Media Kit | Essential for Polishing, 4 Steps Rock Tumbling Refill Media, Polish up to 25 lbs of Rocks, Work with Any Rock Tumblers, for More Tumbles
- Rock Tumbler Belt 5-Pack for KomeStone K1, K1 Pro, K3 – Includes 2 Upgraded PU Belts + 3 Rubber Belts – Durable Replacement Kit, Not for K2 or K4

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-06-06*