---
product_id: 709271101
title: "4” Flat Grinding Machine - Grinding Equipment - Shaping and Polishing Tools, Mineral Rock Polishing Machines, Grinding Machines, Includes Rock Mineral Polishing Machine Accessory Kit"
brand: "deruilong"
price: "99.94 OMR"
currency: OMR
in_stock: false
reviews_count: 8
category: "Deruilong"
url: https://www.desertcart.com.om/products/709271101-4-flat-grinding-machine-grinding-equipment-shaping-and-polishing-tools
store_origin: OM
region: Oman
---

# automatic spiral water cooling 9V DC power with overload protection 4-inch precision grinding disc 4” Flat Grinding Machine - Grinding Equipment - Shaping and Polishing Tools, Mineral Rock Polishing Machines, Grinding Machines, Includes Rock Mineral Polishing Machine Accessory Kit

**Brand:** deruilong
**Price:** 99.94 OMR
**Availability:** ❌ Out of Stock

## Summary

> 💎 Elevate your craft with precision polish and pro-level power!

## Quick Answers

- **What is this?** 4” Flat Grinding Machine - Grinding Equipment - Shaping and Polishing Tools, Mineral Rock Polishing Machines, Grinding Machines, Includes Rock Mineral Polishing Machine Accessory Kit by deruilong
- **How much does it cost?** 99.94 OMR with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/709271101-4-flat-grinding-machine-grinding-equipment-shaping-and-polishing-tools)

## Best For

- deruilong enthusiasts

## Why This Product

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

## Key Features

- • **All-in-One Pro Kit:** Comes with a complete accessory set tailored for jewelry makers at every skill level.
- • **Safety-First Power:** Stable 9V DC supply with built-in overload protection for worry-free operation.
- • **Compact Portability:** Lightweight ABS body (3 lbs) fits perfectly on any workspace or on-the-go projects.
- • **Cool & Clean Workflow:** Automatic spiral pump water supply flushes dust and cools grinding disc continuously.
- • **Versatile Gemstone Mastery:** Grind, shape & polish glass, crystal, jasper & synthetic stones effortlessly.

## Overview

The Deruilong 4” Flat Grinding Machine is a compact, versatile tool designed for grinding, shaping, and polishing a wide range of gemstones and minerals. Powered by a safe 9V DC supply with overload protection, it features an automatic water cooling system to enhance performance and durability. Lightweight and portable, it includes a comprehensive accessory kit ideal for both beginners and professionals in jewelry making.

## Description

Buy Deruilong 4” Flat Grinding Machine - Grinding Equipment - Shaping and Polishing Tools, Mineral Rock Polishing Machines, Grinding Machines, Includes Rock Mineral Polishing Machine Accessory Kit: Polishing & Buffing - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Great little machine super easy to use for beginners like me - Great little machine. Really only works for small stones but you can't find anything like this for this kind of price anywhere else. People complain about the arbor size being too small making replacement discs an impossible find. However, if you just click on the company store they sell a replacement and expanded disc set of the correct size for 22 bucks. I ordered one at the same time I ordered the machine. No need to call them on the phone and struggle through the language barrier as some of these other reviews suggest. My only complaint is that I wish it was 6 in. I haven't tried the polishing pad with polishing paste yet. Highly recommended.
Review: About the arbor size issue - This is a great little machine. Grinds small rocks very well. For those complaining about arbor size, just order a 5/8 to 3/8 adaptor (aka a washer). I use the disk that comes with the machine as a base, then put on the adaptor, then any type of 5/8 wheel you wanna use. I then flip the retaining nut upside down and tighten. I've cut and polished 35 cabs so far and have had great results.

## Features

- MULTIPURPOSE : The flat grinder machine is designed to grind, shape and polish glass, crystal, jasper and a wide range of natural and synthetic gemstone materials. With this versatile flat grinder, you can make necklaces, earrings, rings and other jewelry with ease
- SAFETY AND STABILITY: This flat grinding machine is powered by a 9-volt DC power supply to ensure your safety while providing stable and reliable performance. Built-in overload protection protects the machine from damage and ensures long-lasting durability
- AUTOMATIC WATER SUPPLY: The base of the grinding disc adopts the spiral pump principle, which can automatically lead water to the grinding area, effectively flushing away dust and cooling the grinding disc. The automatic water supply function makes your work smoother
- COMPACT AND CONVENIENT: This flat grinding machine is made of ABS plastic, rust-resistant and easy to clean. Measuring 198 mm × 198 mm × 180 mm(7.8 in × 7.8 in × 7 in)and weighing only 3 pounds, it is compact and lightweight, making it easy to carry and store
- PERFECT SET: The Flat Grinder comes with an accessory kit designed specifically for grinding, shaping and polishing glass and crystal. Whether you're a beginner, a professional, an artist or a hobbyist, it's perfectly suited to your grinding job, and this is an easy-to-use product and device for everyone at all levels of experience

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Deruilong |
| Color | Purple |
| Included Components | entire set |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Power Source | DC |
| Specific Uses For Product | Jewelry Making |

## Product Details

- **Brand:** Deruilong
- **Color:** Purple
- **Included Components:** entire set
- **Material:** Acrylonitrile Butadiene Styrene (ABS)
- **Power Source:** DC

## Images

![4” Flat Grinding Machine - Grinding Equipment - Shaping and Polishing Tools, Mineral Rock Polishing Machines, Grinding Machines, Includes Rock Mineral Polishing Machine Accessory Kit - Image 1](https://m.media-amazon.com/images/I/61rlgzsMg+L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great little machine super easy to use for beginners like me
*by A***K on July 16, 2025*

Great little machine. Really only works for small stones but you can't find anything like this for this kind of price anywhere else. People complain about the arbor size being too small making replacement discs an impossible find. However, if you just click on the company store they sell a replacement and expanded disc set of the correct size for 22 bucks. I ordered one at the same time I ordered the machine. No need to call them on the phone and struggle through the language barrier as some of these other reviews suggest. My only complaint is that I wish it was 6 in. I haven't tried the polishing pad with polishing paste yet. Highly recommended.

### ⭐⭐⭐⭐⭐ About the arbor size issue
*by R***R on June 21, 2025*

This is a great little machine. Grinds small rocks very well. For those complaining about arbor size, just order a 5/8 to 3/8 adaptor (aka a washer). I use the disk that comes with the machine as a base, then put on the adaptor, then any type of 5/8 wheel you wanna use. I then flip the retaining nut upside down and tighten. I've cut and polished 35 cabs so far and have had great results.

### ⭐⭐⭐⭐ Good cheap option for flat lap. Or beginner
*by J***E on December 8, 2025*

Great cheap option for flat lap. Works great for my lapidary jewelry. They sell the disc's and bufff pads on their site. I just bought buff pads and punched 3/8holes.... washer for the 5/8 or 1/2 arbor holes I just bought at hardware store. Better than I thought it would be

## Frequently Bought Together

- Deruilong 4” Flat Grinding Machine - Grinding Equipment - Shaping and Polishing Tools, Mineral Rock Polishing Machines, Grinding Machines, Includes Rock Mineral Polishing Machine Accessory Kit
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*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-02-02*