---
product_id: 768935470
title: "Iverntech 300mm Black Linear Rail Guide MGN12H Bearing Steel Sliding Guideway with MGN12 Stainless Steel Black Carriage Block for Ender 3, Corexy, Tronxy 3D Printers Upgrades and CNC Machine"
brand: "iverntech"
price: "$6.65"
currency: USD
in_stock: false
url: https://www.desertcart.us/products/768935470-iverntech-300mm-black-linear-rail-guide-mgn12h-bearing-steel-sliding
store_origin: US
region: United States of America
---

# 300mm precision length High hardness alloy steel Blackening rust-resistant coating Iverntech 300mm Black Linear Rail Guide MGN12H Bearing Steel Sliding Guideway with MGN12 Stainless Steel Black Carriage Block for Ender 3, Corexy, Tronxy 3D Printers Upgrades and CNC Machine

**Brand:** iverntech
**Price:** $6.65
**Availability:** ❌ Out of Stock

## Summary

> ⚙️ Upgrade your motion game with precision and style!

## Quick Answers

- **What is this?** Iverntech 300mm Black Linear Rail Guide MGN12H Bearing Steel Sliding Guideway with MGN12 Stainless Steel Black Carriage Block for Ender 3, Corexy, Tronxy 3D Printers Upgrades and CNC Machine by iverntech
- **How much does it cost?** $6.65 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/768935470-iverntech-300mm-black-linear-rail-guide-mgn12h-bearing-steel-sliding)

## Best For

- iverntech enthusiasts

## Why This Product

- Trusted iverntech 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 with M3×8mm screw compatibility for hassle-free setup.
- • **Smooth & Silent Glide:** Premium bearing steel ensures ultra-low noise and friction for flawless motion.
- • **Optimized for 3D & CNC:** Perfect upgrade for Ender 3, CoreXY, Tronxy printers, and industrial CNC machines.
- • **Precision Fit & Safety:** Includes dual rubber stoppers to prevent carriage derailment during high-speed moves.
- • **Rust-Resistant Durability:** Blackening surface treatment protects against corrosion for long-lasting performance.

## Overview

The Iverntech 300mm Black Linear Rail Guide MGN12H is a high-quality alloy steel sliding guideway designed for 3D printers and CNC machines. Featuring a rust-resistant blackened surface, precision bearing steel for smooth, low-noise operation, and safety rubber stoppers, it offers reliable, durable linear motion. Fully oiled and easy to install with M3 screws, it’s the perfect upgrade for professional-grade DIY and industrial applications.

## Description

Installation screw size: M3×8mm. The guide rail may have a tolerance of ±1mm，but this does not affect normal use. The mark on the bearing surface is only the mark made by the factory, not a scratch. Normally each side is lack of 1 or 2 balls.The carriage block will get stuck easily if it is full of balls, the balls on each side need some room. Some lubricant is needed, the longer they are used, the smoother they will run.

## Features

- Each 300mm MGN12 is fully oiled and packed individually. Blackening treatment on surface of linear motion slide rails helps prevent rusting in long-term use.
- Hold the roller up during the disassembly process to prevent the ball from accidentally falling.
- Linear bearings made of quality bearing steel. Ensures durability, high hardness,stiffness,smooth running, low noise and non-pollution.
- There are 2 black rubber stoppers on the ends of the rail in case the carriage falls off the rail.
- Widely Application:DIY 3D printers, Large-scale transmission equipments including industrial robots, cleaning equipment and supporting devices, etc. please use M3 T nut and screw to fix the linear rail for 20 series EU Al-profile.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Iverntech |
| Part number | AW014 |
| Item Weight | 281 g |
| Package Dimensions | 32.51 x 3.99 x 3.71 cm; 281 g |
| Manufacturer reference | AW014 |
| Size | 300MM |
| Colour | All Black |
| Material | Alloy Steel |
| Batteries included? | No |
| Batteries Required? | No |

## Images

![Iverntech 300mm Black Linear Rail Guide MGN12H Bearing Steel Sliding Guideway with MGN12 Stainless Steel Black Carriage Block for Ender 3, Corexy, Tronxy 3D Printers Upgrades and CNC Machine - Image 1](https://m.media-amazon.com/images/I/51J3CgPxUGL.jpg)
![Iverntech 300mm Black Linear Rail Guide MGN12H Bearing Steel Sliding Guideway with MGN12 Stainless Steel Black Carriage Block for Ender 3, Corexy, Tronxy 3D Printers Upgrades and CNC Machine - Image 2](https://m.media-amazon.com/images/I/516pPWIhwVL.jpg)
![Iverntech 300mm Black Linear Rail Guide MGN12H Bearing Steel Sliding Guideway with MGN12 Stainless Steel Black Carriage Block for Ender 3, Corexy, Tronxy 3D Printers Upgrades and CNC Machine - Image 3](https://m.media-amazon.com/images/I/61UQbPAsycL.jpg)
![Iverntech 300mm Black Linear Rail Guide MGN12H Bearing Steel Sliding Guideway with MGN12 Stainless Steel Black Carriage Block for Ender 3, Corexy, Tronxy 3D Printers Upgrades and CNC Machine - Image 4](https://m.media-amazon.com/images/I/418K6Gg93DL.jpg)
![Iverntech 300mm Black Linear Rail Guide MGN12H Bearing Steel Sliding Guideway with MGN12 Stainless Steel Black Carriage Block for Ender 3, Corexy, Tronxy 3D Printers Upgrades and CNC Machine - Image 5](https://m.media-amazon.com/images/I/41TWa8lfkaL.jpg)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-15*