# KomeStone KS0619RT82 4 lb Rock Tumbler Kit

The KomeStone KS0619RT82 rock tumbler kit pairs a claimed 4 lb rubber barrel with a brushless motor, three speeds and a programmable timer. Its included rocks and polishing grit make it a substantial starter bundle, while the reported durability concerns are worth weighing for extended use.

- [Original product page](https://loonieperks.com/product/komestone-ks0619rt82-4-lb-rock-tumbler-kit)
- [View offer](https://loonieperks.com/visit/komestone-ks0619rt82-4-lb-rock-tumbler-kit)
- Market: CA
- Language: en-CA
- Currency: CAD
- Brand: KomeStone
- Model: KS0619RT82
- Price: 134.99 CAD
- Previous price: 169.99 CAD
- Discount: 21%
- Price checked: 2026-11-13T12:36:42.876Z
- Rating: 4.4 / 5
- Reviews: 272

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Brushless motor and reinforced metal base, according to the listing.
- Three speeds, a 9-day timer, auto shutoff and settings memory are listed for controlling long tumbling cycles.
- The manufacturer claims the rubber barrel is up to 75% quieter than plastic barrels. This is a comparison claim, not an independent measurement.
- Kit contents include rough rocks, polishing grit, spare belts and basic accessories.

## Pros

- The adjustable speeds and long timer offer control across multi-day polishing stages.
- The included rough rocks and grit let buyers begin with supplies listed in the kit.
- The rubber barrel and metal base address vibration and stability, though customer feedback also flags durability concerns.

## Cons

- A single barrel limits the setup to one tumbling batch at a time.
- Long tumbling cycles require monitoring the condition of the drive belts, which the manufacturer says can wear under heavy loads.

## Specifications

### Identity
- Brand: KomeStone
- Model: KS0619RT82
### Capacity and controls
- Timer: programmable 9-day timer
- Automatic shutoff: Auto shutoff powers the machine down automatically when the cycle is complete
- Memory function: memory function resumes operation using your previous settings after pauses or inspections
### Motor and construction
- Motor: Cutting-Edge Brushless Motor
- Base: Heavy-Duty Metal Base
- Barrel material: Rubber
### Power and battery
- Power configuration: AC adapter/electrical
### Dimensions and installation
- Dimensions listed: 28 x 22.9 x 18.5 centimetres
- Weight listed: 3.63 kg
### Use
- Recommended age: 13 years and up
- Indoor or outdoor use: Indoor
- Operation mode: Manual

## Before you buy

- The listing describes a 4 lb capacity barrel and calls the kit single-barrel. The manufacturer contents list names one barrel, while the feature copy also describes four grit bags and a four-stage, eight-bag grit set. Confirm the selected listing's exact grit quantity. Customer feedback is positive about quiet operation and build, but also reports some motor-bracket durability failures, so long-term reliability is not assured by the listed features.

## In the box

- 1-Year Warranty Card and Illustrated User Book (Included)
- 2 Belts (Included)
- Jewelry Fastenings (Included)
- Mesh Strainer (Included)
- Screwdriver (Included)
- Power adapter (Included)
- 9 Types and 1 lb Assorted Rough Rocks (Included)
- 4 Bags of Polishing Grits (Included): Another feature description says the set contains 8 bags. Confirm the selected listing's quantity.
- Metal Rock Tumbler Base and 4 lb Capacity Rubber Barrel (Included)

## A good fit for

- Rock hobbyists wanting a single-barrel tumbler with adjustable speeds and a long timer.
- Buyers who want rough stones and polishing grit included for an initial tumbling project.
- Indoor users with space for a multi-day appliance and its listed dimensions.

## Less suited to

- Anyone needing to polish multiple batches simultaneously.
- Buyers prioritizing proven long-term durability, given the reported motor-bracket failures.

## Customer feedback

Customer feedback highlights quiet operation, solid-feeling construction and functionality, which matter for a tumbler intended to run through extended cycles indoors. However, some customers report durability issues, including a motor bracket breaking after 60 days. The favourable overall rating distribution coexists with a meaningful low-star share, so it should not be read as a guarantee of long-term reliability.
- Positive themes: Customers describe the unit as quieter than expected and praise its solid build.
- Positive themes: Feedback also praises its functionality and ease of use.
- Negative themes: Some customers report durability problems, including a motor bracket breaking after 60 days.

## Frequently asked questions

### What is the barrel capacity?
The listing names a 4 lb capacity rubber barrel and describes the kit as single-barrel.
### What controls does it have?
The listing specifies three adjustable speeds, a programmable 9-day timer, auto shutoff and a memory function.
### What supplies are included?
The stated contents include assorted rough rocks, polishing grit, two belts, jewelry fastenings, a mesh strainer, screwdriver, power adapter, illustrated user book and warranty card, along with the metal base and rubber barrel. The listing differs on the grit quantity, so confirm that detail before purchase.
### Is it suitable for unattended long cycles?
The manufacturer describes an auto-shutoff timer and memory function for long cycles. These are listing claims, and customer feedback also mentions some durability problems, so they do not establish trouble-free unattended use.

## Alternative options

- [Leegol Electric Rock Tumbler Kit - Double Drum Rock Polisher](https://loonieperks.com/visit/komestone-ks0619rt82-4-lb-rock-tumbler-kit)
- [National Geographic Hobby Rock Tumbler Kit with Grit and Polish Refill \| Rough Gemstones, Grit and Polish, Jewellery Fastenings, Rock Polishing, Geology STEM Activity](https://loonieperks.com/visit/komestone-ks0619rt82-4-lb-rock-tumbler-kit)
- [Leegol Electric Rotary Rock Tumbler - Double Drum 6LB Lapidary Polisher \(Double Barrel\)](https://loonieperks.com/visit/komestone-ks0619rt82-4-lb-rock-tumbler-kit)
- [Ultra Quiet Brushless Rock Tumbler Kit – 7LB Dual Barrel Polisher with Noise-Canceling Cover, Complete Gemstone & Jewelry STEM Set for Adults & Gift](https://loonieperks.com/visit/komestone-ks0619rt82-4-lb-rock-tumbler-kit)
- [K1 Pro Professional Rock Tumbler Kit for Adults, 2.5Lb Barrel \| 75% Quieter Brushless Rock Polisher, 40,000-Hour Motor Life, Pause & Memory, Complete Gem Polishing Kit, Gift For All Ages](https://loonieperks.com/visit/komestone-ks0619rt82-4-lb-rock-tumbler-kit)
- [K1 Rock Tumbler Kit - 2.5LB Quiet Polisher for Adults & Beginners \| Complete Rotary Gem Polishing Kit with Thick Rubber Barrel, 3 Speeds, 9-Day Timer, Pause & Memory, Ideal Gift for All Ages](https://loonieperks.com/visit/komestone-ks0619rt82-4-lb-rock-tumbler-kit)
- [KomeStone K2 Elite Professional Rock Tumbler Kit, Ultra Quiet & Cutting Edge Brushless Motor Rock Polisher for Adults & Rock Collectors, Noise-Reduction, Extra Large 3 Lbs Barrel, STEM Gift for All](https://loonieperks.com/visit/komestone-k2-elite-rock-tumbler-kit)
- [C1 Classic Rock Tumbler Kit - Large 2.5LB Capacity, 3-Speed Motor & 9-Day Timer, Professional Rotary Stone Polisher with Rough Gemstones & 4 Steps Polishing Grits, Ideal for Adults Kids](https://loonieperks.com/visit/komestone-ks0619rt82-4-lb-rock-tumbler-kit)
- [KoolStone C1 Pro Max Brushless Rock Tumbler Kit - Extra Large 3LB Capacity, Up to 6X More Noise Cancelling, Ultra Quiet Rotary Polisher with Full Accessories, Ideal for Adults Kids](https://loonieperks.com/visit/komestone-ks0619rt82-4-lb-rock-tumbler-kit)
- [NATIONAL GEOGRAPHIC Professional Rock Tumbler Kit - Complete Rock Tumbler Kit with Durable 2 Lb. Barrel, Rocks, Grit, and Patented GemFoam Finishing Foam Polish, Educational STEM Science Kit](https://loonieperks.com/visit/komestone-ks0619rt82-4-lb-rock-tumbler-kit)
- [NATIONAL GEOGRAPHIC Starter Rock Tumbler Kit - Includes Rough Gemstones, 4-Stage Silicon Carbide Polishing Grit, Jewellery Fastenings & Learning Guide - STEM Science Kit for Geology Enthusiasts](https://loonieperks.com/visit/komestone-ks0619rt82-4-lb-rock-tumbler-kit)
- [Advanced Professional Rock Tumbler Kit - with Digital 9-Day Polishing Timer & 3 Speed Settings - Turn Rough Rocks into Beautiful Gems : Great Science & STEM Gift for Kids All Ages : Geology Toy](https://loonieperks.com/visit/komestone-ks0619rt82-4-lb-rock-tumbler-kit)

## Add-ons

- [Polly Plastics Rock Tumbler Grit and Polish Refill & Ceramic Tumbling Filler Media - Silicone Carbide Polisher Grit - Rock Polish Supplies & Accessories](https://loonieperks.com/visit/komestone-ks0619rt82-4-lb-rock-tumbler-kit)

## Images

![KomeStone KS0619RT82 4 lb Rock Tumbler Kit — 1](https://loonieperks.com/i/7AmmSo4QegNSp1coywwXFTXfskYL6mxzToqcVSEXroEyH-4Cb24lEyuVFyC7QkMBXPQa4URC6tNWIqUlp0mj3CNXoBwpuwHiXJRGsCx145o53qpw5oDoEx8p.jpg)

![KomeStone KS0619RT82 4 lb Rock Tumbler Kit — 2](https://loonieperks.com/i/D85cgZF-H0wiw5fO1EF1eVnQvLzzvqXVFsiYJ7wfTG5Y2pBwPHq_tTA1CkGMUjUka-vvkziW_tCwSi0g75b9iMlBbqoZGNf4hRycXSuDUL5DeQAoA4OrRS3I.jpg)

![KomeStone KS0619RT82 4 lb Rock Tumbler Kit — 3](https://loonieperks.com/i/eOHQWu0MCmrq_Pi_0FuLYw-guL4th5aV1TZasdDrqLQKdUaQY4bsiMc0NpW3VNoppufxwFbweTbhkx4QdTo42L4k55Vvz3iim42RuoYVrIUHcHESNnjX3XST.jpg)

![KomeStone KS0619RT82 4 lb Rock Tumbler Kit — 4](https://loonieperks.com/i/-ZOAoP9HHXWjvdM_Qfdas39tu3amRh8BTeEyEZMqCZTuTANaxVON97IqyY79pVts6MNs2Hl-wVSAD-LBw_9NWp4zPizFZ1iVwxaeAeoL0VM4muA5FKJ9ZxTv.jpg)

![KomeStone KS0619RT82 4 lb Rock Tumbler Kit — 5](https://loonieperks.com/i/_j83aaaVYC4Tm-VLiEQNQCXlL1bdwrtJTWIolGfY_idJPay8XI0A2Ztc8S42stc8HbDMGo3j9vqFjqnuV2tSTDvVFiZLxqTvlV5UlmWjJbKvZAjV7i6S7k_A.jpg)

![KomeStone KS0619RT82 4 lb Rock Tumbler Kit — 6](https://loonieperks.com/i/e5lFV3_PGmv9hcsHH3L9ZnbrM_GoGJQoXSiINsWdMPP0vMWC95cHceKp4a7mzx4_8JWXdhwhsR9ajfyaXo0oXdkzhEuiAwaC4GP4UmqAMzcVWAB4MeK39LAv.jpg)

![KomeStone KS0619RT82 4 lb Rock Tumbler Kit — 7](https://loonieperks.com/i/HhbrxXqGmFolALQgGfFRSmoMOGNcBR48I95coNK2pAxNSSfqJm3OEaERqA6lU305fC66aLZSbMcBfmjk2b76sNOq7xjV5bx3we1NaFTuw0qnGQu7lFJFMVqF.jpg)