---
product_id: 788194327
title: "Linear Motion Guide, FEYRINX 2PCS 12mm x 300mm (.472 x 11.81 inches) Case Hardened Chrome Linear Rail Rod Shaft for 3D Printer, DIY, CNC - Metric h8 Tolerance"
brand: "feyrinx"
price: "B/.189"
currency: PAB
in_stock: true
reviews_count: 5
category: "Feyrinx"
url: https://www.desertcart.com.pa/products/788194327-linear-motion-guide-feyrinx-2pcs-12mm-x-300mm-472-x
store_origin: PA
region: Panama
---

# ±0.005mm diameter tolerance 150mm length precision 55-60 HRC hardness Linear Motion Guide, FEYRINX 2PCS 12mm x 300mm (.472 x 11.81 inches) Case Hardened Chrome Linear Rail Rod Shaft for 3D Printer, DIY, CNC - Metric h8 Tolerance

**Brand:** feyrinx
**Price:** B/.189
**Availability:** ✅ In Stock

## Summary

> ⚙️ Elevate your build with precision rails that mean business.

## Quick Answers

- **What is this?** Linear Motion Guide, FEYRINX 2PCS 12mm x 300mm (.472 x 11.81 inches) Case Hardened Chrome Linear Rail Rod Shaft for 3D Printer, DIY, CNC - Metric h8 Tolerance by feyrinx
- **How much does it cost?** B/.189 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/788194327-linear-motion-guide-feyrinx-2pcs-12mm-x-300mm-472-x)

## Best For

- feyrinx enthusiasts

## Why This Product

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

## Key Features

- • **Precision Perfected:** Ultra-tight metric h8 tolerance (6mm ±0.005mm diameter) guarantees flawless alignment for your CNC, 3D printer, or DIY projects.
- • **Rock-Solid Durability:** Case hardened C45 steel with chrome plating ensures corrosion resistance and a jaw-dropping 55-60 HRC hardness for long-lasting performance.
- • **Smooth & Silent Operation:** Designed for high-speed, low-noise linear motion with closed-type slide units—because your workspace deserves precision without distraction.
- • **Confidence in Every Package:** Includes 2 premium shafts backed by a 1-year warranty and 30-day money-back guarantee, plus 24/7 customer support to keep your projects moving.
- • **Versatile Engineering Essential:** Ideal for CNC machines, 3D printers, injection molding, and engraving—upgrade your build with components trusted by pros.

## Overview

The FEYRINX Linear Motion Guide set includes two 6mm x 150mm case-hardened, chrome-plated steel shafts engineered with metric h8 tolerance for exceptional precision and durability. Perfect for CNC, 3D printing, and other high-accuracy applications, these rods deliver smooth, low-noise linear motion backed by a 1-year warranty and responsive customer service.

## Description

Product Description Product Specifications Color: Silver Material: High Quality Carbon Steel (C45#) Hardness: 55-60 HRC Surface Hard-thickness: 0.8 – 2.5mm Surface roughness: 0.8S – 1.6S Straightness: Below 5μm/100mm Surface Chrome thickness: 10um-20um Surface Finish Quality: Ra 0.8 Package Included 2 * Linear Rail Shaft Multiple Choice - One Stop Shop In order to meet customers' different needs. Feyrinx have already expanded our linear rail rod from diam 6mm to diam 16mm, length from 150mm to 800mm. Over 30 different choices, there is always a size suit you. linear rod shaft High Quality Material Adapting high-purity C45# carbon steel as raw materials, which ensure our products’ high brightness and hardness. Better material, better performance. Bright Like Mirror & Anti-Corrosion Feyrinx linear rails have been processed with advanced grinding machine technology, Chrome plated surface (10um-20um) make product look like mirror, protecting products from corrosion, making them more durable. High Frequency Quenching All the products have been processed with high frequency quenching technology, making products’ hardness could reach up to 55-60 HRC. High hardness ensure products’ long performance life. Widely Applications The linear rods are perfect for your DIY project, bearing system, linear motion system, widely used in the automation machinery such as 3D printer machine, wood machines, machine tools, bending machines, laser welding machines and other industrial machines. Chamfering Process All of our products have chamfers on both ends, processed by auto machine, both ends are processed almost the same. Chamfers make products have better performance in daily usage, easier for user to handle. High-Precision Standard Strict tolerance standard has been applied in manufacturing process. Ensuring every product is in the range of error, no matter the hardness, brightness, or the straightness etc.

Review: Très bon produit - Très bon produit pour mes charriots de précision.
Review: Straight and solid - All I wanted were two 45cms of straight and solid rods for a filament drybox and that is exactly what I got. The packaging was great enough to protect them in transport.

## Features

- 👍HIGH HARDNESS: Adapting C45 high quality steel, high frequency quenching, surface chromium plating(10um-20um). The case hardness could be reach to 55-60 HRC. Durable and corrosion-resistant
- 👍EXTENSIVE APPLICATION: Widely applied in CNC, 3D printer, automatic machinery, injection molding machine, engraving machine, etc. especially in bearing purpose.
- 👍HIGH ACCURACY: Diameter 12mm, tolerance -0.005mm to -0.03mm ( 11.995mm - 11.97mm), length 300mm, tolerance ± 0.5mm ( 299.5mm - 300.5mm ).
- EASY TO USE: Taking the role as round steel shaft with linear support blocks and closed type slide units, suitable for high speed, low noise and high precision equipment.
- 👍WHAT YOU GET: 2PCS 12mm x 300mm Linear Motion Shaft. 30-Days money back guarantee, 1-Year warranty, 24/7 friendly customer service.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08HX2LG53 |
| Bearing Type | Plain Bearing |
| Bearing type | Plain Bearing |
| Best Sellers Rank | 183,416 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 5,024 in 3D Printer Accessories |
| Brand | Feyrinx |
| Customer Reviews | 4.8 out of 5 stars 343 Reviews |
| Item Dimensions | 30 x 1.2 x 1.2 centimetres |
| Item Weight | 0.55 Kilograms |
| Item dimensions L x W x H | 30 x 1.2 x 1.2 centimetres |
| Item weight | 0.55 Kilograms |
| Manufacturer | Feyrinx |
| Manufacturer Part Number | FG012-300MM |
| Material | Carbon Steel (C45#), Chrome Plated |
| Model Number | FG012-300MM |
| Outside Diameter | 12 Millimetres |
| Outside diameter | 12 Millimetres |
| UPC | 738634943102 |

## Product Details

- **Brand:** Feyrinx
- **Item dimensions L x W x H:** 15 x 0.6 x 0.6 centimetres
- **Item weight:** 0.07 Kilograms
- **Material:** Carbon Steel (C45#), Chrome Plated
- **UPC:** 738634943317

## Images

![Linear Motion Guide, FEYRINX 2PCS 12mm x 300mm (.472 x 11.81 inches) Case Hardened Chrome Linear Rail Rod Shaft for 3D Printer, DIY, CNC - Metric h8 Tolerance - Image 1](https://m.media-amazon.com/images/I/61uWV0OdftL.jpg)
![Linear Motion Guide, FEYRINX 2PCS 12mm x 300mm (.472 x 11.81 inches) Case Hardened Chrome Linear Rail Rod Shaft for 3D Printer, DIY, CNC - Metric h8 Tolerance - Image 2](https://m.media-amazon.com/images/I/61sk-tQ-uXL.jpg)
![Linear Motion Guide, FEYRINX 2PCS 12mm x 300mm (.472 x 11.81 inches) Case Hardened Chrome Linear Rail Rod Shaft for 3D Printer, DIY, CNC - Metric h8 Tolerance - Image 3](https://m.media-amazon.com/images/I/71mS-3EFYoL.jpg)
![Linear Motion Guide, FEYRINX 2PCS 12mm x 300mm (.472 x 11.81 inches) Case Hardened Chrome Linear Rail Rod Shaft for 3D Printer, DIY, CNC - Metric h8 Tolerance - Image 4](https://m.media-amazon.com/images/I/71Th+Okh4rL.jpg)
![Linear Motion Guide, FEYRINX 2PCS 12mm x 300mm (.472 x 11.81 inches) Case Hardened Chrome Linear Rail Rod Shaft for 3D Printer, DIY, CNC - Metric h8 Tolerance - Image 5](https://m.media-amazon.com/images/I/7192VnCAhCL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Très bon produit
*by A***E on 28 March 2023*

Très bon produit pour mes charriots de précision.

### ⭐⭐⭐⭐⭐ Straight and solid
*by M***I on 7 January 2024*

All I wanted were two 45cms of straight and solid rods for a filament drybox and that is exactly what I got. The packaging was great enough to protect them in transport.

### ⭐⭐⭐⭐⭐ Precision made
*by B***N on 14 November 2020*

I used these shafts to build a balancing stand. The rails need to be uniform, straight, and hard. A plus in all categories.

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*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-07-21*