---
product_id: 542530882
title: "MGN12H 300mm Linear Slide Rail MGN12 for 3D Printer Rails and CNC Machine Rails"
brand: "imetrx"
price: "S/.157"
currency: PEN
in_stock: true
reviews_count: 13
category: "I Metrx"
url: https://www.desertcart.pe/products/542530882-mgn12h-300mm-linear-slide-rail-mgn12-for-3d-printer-rails
store_origin: PE
region: Peru
---

# low noise operation high precision & smooth motion 300mm heavy-duty steel rail MGN12H 300mm Linear Slide Rail MGN12 for 3D Printer Rails and CNC Machine Rails

**Brand:** imetrx
**Price:** S/.157
**Availability:** ✅ In Stock

## Summary

> ⚙️ Elevate your build with precision that moves you forward!

## Quick Answers

- **What is this?** MGN12H 300mm Linear Slide Rail MGN12 for 3D Printer Rails and CNC Machine Rails by imetrx
- **How much does it cost?** S/.157 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/542530882-mgn12h-300mm-linear-slide-rail-mgn12-for-3d-printer-rails)

## Best For

- imetrx enthusiasts

## Why This Product

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

## Key Features

- • **Ready to Install:** Comes fully oiled and individually packed for immediate, hassle-free setup.
- • **Silent Efficiency:** Enjoy whisper-quiet operation that keeps your workspace focused and professional.
- • **Durability That Lasts:** Crafted from heavy-duty bearing steel for long-lasting performance under industrial conditions.
- • **Versatile Compatibility:** Perfectly suited for 3D printers, CNC machines, and industrial robots.
- • **Engineered for Precision:** Experience ultra-smooth, high-stiffness linear motion with minimal play.

## Overview

The iMetrx MGN12H 300mm Linear Slide Rail is a robust, high-precision rail designed for 3D printers, CNC machines, and industrial robots. Made from heavy-duty bearing steel, it ensures smooth, low-noise motion and durability. Fully oiled and individually packed, it offers easy installation and reliable performance at a competitive price point.

## Description

iMetrx MGN12H 300mm Linear Slide Rail MGN12 for 3D printer rails and CNC machine rails

Review: For the Price - So far so go - Buying inexpensive linear rails is a total hit or miss. Hiwin is the way to go, but man they're pricy. I really wanted black rails as well, so I figured I'd give these a shot. Ordered two - packaging was meh, they were of course covered in oil to prevent corrosion, but overall the rails moved pretty well. Both rails arrived straight and true, and there's no play in the carriage which is nice too. Properly cleaning and lubricating these made a world of difference, as expected, and so far they've been on my Ender 3 v2 with great success. One had some very minor rough spots that have seem to smooth out without introducing any play, which is always worrying but nonetheless. These aren't the Hiwin rails by any means, but I'm quite delighted with the quality for the price point and plan to buy more in the future. Will definitely update this after I've had some more time with them, but I've had them in use for about 3 weeks now and they've been treating me well.
Review: funciona bien - very good, thanks

## Features

- Package Include: MGN12H 300mm Linear Slide Rail x1pc
- Each MGN12H 300mm is fully oiled and packed individually.
- The LInear Slide Rail 300mm is made of heavy-duty bearing steel, which is more durable than other bearings, high stiffness, high precision, smooth running and low noise.
- iMetrx MGN12 300mm Rail is widely used in industrial robots and CNC and other large
- MGN12H 300mm Note: Please use M3 T nut and screw to fix the linear rail for 20 series Alu profile.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B097P9PTKP |
| Best Sellers Rank | #36,516 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #3 in Linear Motion Slide Rails |
| Date First Available | November 18, 2022 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 10.5 ounces |
| Item model number | MGN12H |
| Manufacturer | iMetrx |
| Package Dimensions | 13.43 x 2.6 x 1.54 inches |

## Images

![MGN12H 300mm Linear Slide Rail MGN12 for 3D Printer Rails and CNC Machine Rails - Image 1](https://m.media-amazon.com/images/I/21z2zMBXfHL.jpg)
![MGN12H 300mm Linear Slide Rail MGN12 for 3D Printer Rails and CNC Machine Rails - Image 2](https://m.media-amazon.com/images/I/31YvMyxpJEL.jpg)
![MGN12H 300mm Linear Slide Rail MGN12 for 3D Printer Rails and CNC Machine Rails - Image 3](https://m.media-amazon.com/images/I/31uRLDjz0OL.jpg)
![MGN12H 300mm Linear Slide Rail MGN12 for 3D Printer Rails and CNC Machine Rails - Image 4](https://m.media-amazon.com/images/I/412VwV4b6vL.jpg)
![MGN12H 300mm Linear Slide Rail MGN12 for 3D Printer Rails and CNC Machine Rails - Image 5](https://m.media-amazon.com/images/I/41XuhDhOurL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ For the Price - So far so go
*by J***T on June 16, 2023*

Buying inexpensive linear rails is a total hit or miss. Hiwin is the way to go, but man they're pricy. I really wanted black rails as well, so I figured I'd give these a shot. Ordered two - packaging was meh, they were of course covered in oil to prevent corrosion, but overall the rails moved pretty well. Both rails arrived straight and true, and there's no play in the carriage which is nice too. Properly cleaning and lubricating these made a world of difference, as expected, and so far they've been on my Ender 3 v2 with great success. One had some very minor rough spots that have seem to smooth out without introducing any play, which is always worrying but nonetheless. These aren't the Hiwin rails by any means, but I'm quite delighted with the quality for the price point and plan to buy more in the future. Will definitely update this after I've had some more time with them, but I've had them in use for about 3 weeks now and they've been treating me well.

### ⭐⭐⭐⭐⭐ funciona bien
*by J***E on October 14, 2025*

very good, thanks

### ⭐⭐⭐⭐ The dimensions in the drawing are not correct!
*by M***B on July 26, 2024*

Make sure to measure your part carefully! The spacing between the main mounting holes is 25mm but the spacing from the end of the rail to the first mounting hole is 12mm, NOT 10mm (DIMENSION E). For the 200mm rail, there are 8 mounting holes total. I modeled this in my design with just the drawing dimensions and had to remake my part due to the bad dimensions. Measure twice, cut once!

## Frequently Bought Together

- IMETRX MGN12H 300mm Premium Linear Rail Guide 2 Carriages MGN12 Linear Slide 8mm for 3D Printer and CNC Machine Upgrade
- 5M GT2 Timing Belt, Upgrade Non-Slip Version, Width 6mm, Fit for 3D Printer and Most Belt Driven Printers
- WINSINN GT2 Timing Belt Pulley 20 Teeth, 8mm Bore, for 6mm Width Belt - Ideal for 3D Printers, CNC Machines, Robotics (5-Pack)

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*Product available on Desertcart Peru*
*Store origin: PE*
*Last updated: 2026-02-01*