---
product_id: 464168560
title: "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."
brand: "komestone"
price: "¥54731"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/464168560-k1-pro-professional-cutting-edge-brushless-motor-advanced-rock-tumbler
store_origin: JP
region: Japan
---

# 3-speed motor control 9-day programmable timer 20,000+ hrs brushless motor life 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.

**Brand:** komestone
**Price:** ¥54731
**Availability:** ✅ In Stock

## Summary

> 💎 Turn Rough Rocks into Radiant Gems—Own the Art of Polishing!

## Quick Answers

- **What is this?** 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. by komestone
- **How much does it cost?** ¥54731 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/464168560-k1-pro-professional-cutting-edge-brushless-motor-advanced-rock-tumbler)

## 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

- • **Risk-Free Investment:** Backed by a 2-year warranty plus free spare belts, ensuring your creative flow never stops.
- • **Unmatched Durability:** Brushless motor engineered for 20,000+ hours of smooth, maintenance-free operation.
- • **Complete All-in-One Kit:** Includes 1 lb of rough gemstones, 4 polishing grits, 6 belts, ceramic media, and a detailed tutorial—everything to start your gem crafting journey.
- • **Extended Tumbling Sessions:** 9-day timer ensures hands-free, long-lasting polishing without constant supervision.
- • **Precision Polishing Control:** Three-speed motor lets you tailor the tumbling process for perfect gemstone finishes every time.

## Overview

The K1 Pro Professional Rock Tumbler features a cutting-edge brushless motor with over 20,000 hours of lifespan, a large 2.5 lb rubber barrel, and a 3-speed motor with a 9-day timer for precision polishing. This all-inclusive kit comes with rough gemstones, multiple polishing grits, belts, ceramic media, and an illustrated guide, making it perfect for STEM learning, jewelry making, and hobbyists seeking professional-grade results backed by a 2-year warranty.

## Description

The first Rock Tumbler Designed with Brushless Motor, up to 20,000 hours running life. This KomeStone Advanced Professional Rock Tumbler Kit is a geology stem toy for all kids and adults. It's also a rock polisher for your own gemstones, with illustrated learning guide. What's more, this is a great gift for all ages as a complete educational science kit.

## Features

- Contact us now for extra durable belts for free for spare use.
- 2-Year Warranty for Free Exchange and Replacement. For any issues or if you have missed desertcart's 30-day return window, please reach out via our customer service email: support@komestone.com for help. THIS IS THE BRAND & SELLER COMMITMENT.
- YOUR LAST ROCK TUMBLER : This is the first and only rock tumbler that built in with the cutting-edge brushless motor, providing this advanced rock tumbler with more than 20,000 hours work and service life, and with the thicken tier level rubber barrel, which is also super durable for lasting for years, as well as three protections for water leakage is an extra big plus for years of use. So this is a professional rock tumbler of rough service.
- POLISH YOUR OWN GEMSTONES : Komestone tumbler kit makes tumbling even easier in an interesting way,it works for getting rouhgh and raw rocks smooth enough to use for jewlery, craft, collection, etc,. At last rough rocks will be turned out pretty gemstones with high quality and enough amount grits. Skill comes from practice.
- ALL IN ONE HOBBY & EDUCATIONAL TUMBLING KIT : Our KomeStone rock tumbler kit has everything that need for tumbling, including 1LB for 9 types of real rough gemstone rocks, the tumbler and the barrel, 3 belts and 4 polishing grits and ceramic contact media, sifter, screwdriver, Jewelry Fastenings, and illustrated tutorial guide. It's is a very decent and perfect gift for both children and adults!.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product Dimensions | 28.5 x 22.91 x 13.13 cm; 1.13 kg |
| Manufacturer recommended age | 8 months and up |
| Item model number | K1 Pro |
| Educational Objective(s) | STEM, Concept Development Skills, Geology Learning, Patience, Jewelry Making, Patterning |
| Number of Game Players | No Limit |
| Number of Puzzle Pieces | 1 |
| Assembly Required | No |
| Batteries Required? | No |
| Batteries Included? | No |
| tech_spec_battery_description_toys | No batteries required |
| Material Type(s) | metal, ceramic Cutting-Edge Brushless Motor works more than 20 000 hours ) Tyre grade rubber Top quality of stainless steel 𝐂𝐏𝐒𝐈𝐀 & 𝐂𝐏𝐂 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐞𝐝 Comes with 2-year warranty any issues or if you need 5 extra belts spare use at no cost please reach out via 𝘀𝘂𝗽𝗽𝗼𝗿𝘁@𝗸𝗼𝗺𝗲𝘀𝘁𝗼𝗻𝗲.𝗰𝗼𝗺. |
| Material Care Instructions | Always Keep Your Hair Away, Hand Wash & Do Not Immerse in Water & Wipe with Damp Cloth, Never Pour Used Grits or Grinding Podwer Down Household Drains |
| Remote Control Included? | No |
| Color | Brushless Motor: K1 Pro |
| ASIN | B0B69CK2VG |

## Product Details

- **Size:** 11.3 x 9.17 x 5.87 inches
- **Brand:** KomeStone
- **Theme:** Geology
- **Age range (description):** Even a 4 year old kid knows how to use it.
- **Material:** metal, ceramic Cutting-Edge Brushless Motor works more than 20 000 hours ) Tyre grade rubber Top quality of stainless steel 𝐂𝐏𝐒𝐈𝐀 & 𝐂𝐏𝐂 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐞𝐝 Comes with 2-year warranty any issues or if you need 5 extra belts spare use at no cost please reach out via 𝘀𝘂𝗽𝗽𝗼𝗿𝘁@𝗸𝗼𝗺𝗲𝘀𝘁𝗼𝗻𝗲.𝗰𝗼𝗺.

## Images

![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. - Image 1](https://m.media-amazon.com/images/I/81WpuUctItL.jpg)

## Available Options

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

## 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 Japan*
*Store origin: JP*
*Last updated: 2026-02-01*