---
product_id: 81318124
title: "MJR Tumblers Commercial Duty 20lb Rock Tumbler. Capable of Running 18 Different Barrel Sizes & Combinations. Unmatched Quality, Durability & Versatility. MJR is a USA Disabled & Veteran Owned Company."
brand: "mjr tumblers"
price: "R16510"
currency: ZAR
in_stock: true
reviews_count: 8
category: "Mjr Tumblers"
url: https://www.desertcart.co.za/products/81318124-mjr-tumblers-commercial-duty-20lb-rock-tumbler-capable-of-running
store_origin: ZA
region: South Africa
---

# Runs 18 barrel combos Industrial-grade durability Proudly USA made & veteran owned MJR Tumblers Commercial Duty 20lb Rock Tumbler. Capable of Running 18 Different Barrel Sizes & Combinations. Unmatched Quality, Durability & Versatility. MJR is a USA Disabled & Veteran Owned Company.

**Brand:** mjr tumblers
**Price:** R16510
**Availability:** ✅ In Stock

## Summary

> ⚡ Polish Like a Pro, Powered by Precision & Patriotism!

## Quick Answers

- **What is this?** MJR Tumblers Commercial Duty 20lb Rock Tumbler. Capable of Running 18 Different Barrel Sizes & Combinations. Unmatched Quality, Durability & Versatility. MJR is a USA Disabled & Veteran Owned Company. by mjr tumblers
- **How much does it cost?** R16510 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/81318124-mjr-tumblers-commercial-duty-20lb-rock-tumbler-capable-of-running)

## Best For

- mjr tumblers enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Heavy-duty base with premium stainless steel ball bearing rollers—no plastic parts to wear out.
- • **Trusted Quality Assurance:** Industry-leading 2-year warranty backs your investment in professional-grade tumbling.
- • **Powerful & Efficient Motor:** Industrial fan-cooled, thermally protected motor ensures fastest polishing speeds without overheating.
- • **Versatile Barrel Compatibility:** Supports 18 different barrel sizes & combos for ultimate customization.
- • **Proudly American & Veteran Owned:** Support a disabled veteran-owned business with every purchase—quality you can trust and values you can stand behind.

## Overview

The MJR Tumblers Commercial Duty 20lb Rock Tumbler is a heavy-duty, versatile polishing machine capable of running 18 different barrel sizes and combinations. Featuring premium stainless steel ball bearing rollers and a powerful, fan-cooled motor, it delivers fast, efficient rock tumbling with unmatched durability. Proudly made in the USA by a disabled veteran-owned company, it comes with an industry-leading 2-year warranty, making it the top choice for serious hobbyists and professionals alike.

## Description

Buy MJR Tumblers Commercial Duty 20lb Rock Tumbler. Capable of Running 18 Different Barrel Sizes & Combinations. Unmatched Quality, Durability & Versatility. MJR is a USA Disabled & Veteran Owned Company.: Rock Tumblers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: high capacity great price - i bought this tumbler due to its high capacity and the excellent price. its a sturdy machine and at 25lb capacity the opening is big enough for larger items. as of yet no signs of issues. great value
Review: Better than most - This tumbler is better than most for durability and versatility. Make sure to purchase Lithium Grease you will need it to operate. The price is expensive but it’s a well built tumbler base. And it’s versatile in that this one tumbler can fit a variety of barrel sizes. I purchased the 10lb barrel and have been running 2 3lb barrels. To run smaller barrels I did have to make a modification to the nylon bumper, by adding a longer bolt with a nylon washer to extend the bumper out farther. The MJR barrels have a wide ridge that sits in the rollers. Smaller barrels don’t have such a wide ridge which means they could slip off the rubber roller track. Simple fix to make this adaptable to more barrel combinations. Primary issue noted is belt breakage. The manufacturer sells replacements for $8-15 (depending on tumbler base size) for only one belt. These are just simple O Rings. The size for the 10 lb. tumbler is 4 1/4” x 3/16 “. I found Nitrile O-Rings for $12. Don’t get durometer harder than 70 or they’re too brittle and snap.

## Features

- Commercial Quality, Durability and Unmatched Versatility!
- Heavy Duty Base Will Run 18 Different MJR Tumbler Barrel Sizes and Combinations (Additional Barrel Sizes Sold Separately).
- Premium Quality Stainless Steel Ball Bearing Rollers (No Plastic Bushings Or Bearings)!
- Powerful Industrial Duty Fan Cooled Thermally Protected Motor Turns The Barrels At The Optimum Speed For The Fastest Polishing Possible!
- Industry Leading 2 Year Warranty!
- If You Want The Best, You Want MJR Tumblers!
- MJR Tumblers is a Disabled and Veteran Owned Company!
- Buy American, MJR Tumblers is Proud to be an American Owned Company Located in Pecatonica Illinois USA!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07FZG41ZJ |
| Age Range (Description) | Adult, Kid |
| Best Sellers Rank | #348,450 in Toys & Games ( See Top 100 in Toys & Games ) #72 in Kids' Rock Tumblers |
| Brand | MJR Tumblers |
| Cartoon Character | ****Additional Barrels in videos SOLD SEPARATELY**** |
| Color | Yellow |
| Customer Package Type | Standard Packaging |
| Date First Available | March 11, 2018 |
| Finish Type | Glossy |
| Included Components | Lid |
| Is Discontinued By Manufacturer | No |
| Item Weight | 35 pounds |
| Manufacturer | MJR Tumblers |
| Material Feature | Insulated |
| Number of Items | 1 |
| Pattern | Solid |
| Product Care Instructions | Machine Wash |
| Product Dimensions | 21 x 8 x 10 inches |
| Recommended Uses For Product | Home |
| Reusability | Reusable |
| Shape | Tumblers |
| Size | 160 Ounces |
| Special Feature | Heavy Duty |
| Specific Uses For Product | Rock Tumbling |
| Style | Modern |
| Theme | Rock,Rocks |
| Unit Count | 1 Count |

## Product Details

- **Brand:** MJR Tumblers
- **Capacity:** 1.25 Gallons
- **Color:** Yellow
- **Material:** Metal
- **Special Feature:** Heavy Duty

## Images

![MJR Tumblers Commercial Duty 20lb Rock Tumbler. Capable of Running 18 Different Barrel Sizes & Combinations. Unmatched Quality, Durability & Versatility. MJR is a USA Disabled & Veteran Owned Company. - Image 1](https://m.media-amazon.com/images/I/41NBn2D9CCL.jpg)
![MJR Tumblers Commercial Duty 20lb Rock Tumbler. Capable of Running 18 Different Barrel Sizes & Combinations. Unmatched Quality, Durability & Versatility. MJR is a USA Disabled & Veteran Owned Company. - Image 2](https://m.media-amazon.com/images/I/41QaIs4qkQL.jpg)
![MJR Tumblers Commercial Duty 20lb Rock Tumbler. Capable of Running 18 Different Barrel Sizes & Combinations. Unmatched Quality, Durability & Versatility. MJR is a USA Disabled & Veteran Owned Company. - Image 3](https://m.media-amazon.com/images/I/41XwqkT9xgL.jpg)
![MJR Tumblers Commercial Duty 20lb Rock Tumbler. Capable of Running 18 Different Barrel Sizes & Combinations. Unmatched Quality, Durability & Versatility. MJR is a USA Disabled & Veteran Owned Company. - Image 4](https://m.media-amazon.com/images/I/41nf-Yaj8lL.jpg)
![MJR Tumblers Commercial Duty 20lb Rock Tumbler. Capable of Running 18 Different Barrel Sizes & Combinations. Unmatched Quality, Durability & Versatility. MJR is a USA Disabled & Veteran Owned Company. - Image 5](https://m.media-amazon.com/images/I/41r+rW4ZlkL.jpg)

## Questions & Answers

**Q: What voltage does the motor require?**
A: Plug into regular outlets

**Q: can you run other containers with a 15# container?  or can you switch out to different size containers?**
A: You can use various different sizes or weight containers..I used a larger one and Iran just fine..only draw back is the length is to short and it shifts from side to side wearing down the the plastic ends..it has plenty of power

**Q: What are the outside barrel dimensions? How far are the rollers apart?**
A: I believe it is 6” pipe with a cap and a reducer

**Q: Does it have a timer for auto shutoff?**
A: No it does not

## Customer Reviews

### ⭐⭐⭐⭐⭐ high capacity great price
*by J***W on April 11, 2023*

i bought this tumbler due to its high capacity and the excellent price. its a sturdy machine and at 25lb capacity the opening is big enough for larger items. as of yet no signs of issues. great value

### ⭐⭐⭐⭐ Better than most
*by A***R on March 20, 2022*

This tumbler is better than most for durability and versatility. Make sure to purchase Lithium Grease you will need it to operate. The price is expensive but it’s a well built tumbler base. And it’s versatile in that this one tumbler can fit a variety of barrel sizes. I purchased the 10lb barrel and have been running 2 3lb barrels. To run smaller barrels I did have to make a modification to the nylon bumper, by adding a longer bolt with a nylon washer to extend the bumper out farther. The MJR barrels have a wide ridge that sits in the rollers. Smaller barrels don’t have such a wide ridge which means they could slip off the rubber roller track. Simple fix to make this adaptable to more barrel combinations. Primary issue noted is belt breakage. The manufacturer sells replacements for $8-15 (depending on tumbler base size) for only one belt. These are just simple O Rings. The size for the 10 lb. tumbler is 4 1/4” x 3/16 “. I found Nitrile O-Rings for $12. Don’t get durometer harder than 70 or they’re too brittle and snap.

### ⭐⭐⭐⭐⭐ 15pd rock tumbler
*by K***Y on November 2, 2022*

This thing is too easy to use, works well, I usually find the rocks and my husband does the polishing, it works out for us😊

## Frequently Bought Together

- MJR Tumblers Commercial Duty 20lb Rock Tumbler. Capable of Running 18 Different Barrel Sizes & Combinations. Unmatched Quality, Durability & Versatility. MJR is a USA Disabled & Veteran Owned Company.
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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-20*