---
product_id: 563238645
title: "Iverntech MGN12 400mm Linear Rail Guide with MGN12H Stainless Steel Carriage Block for Ender 3, Corexy, Tronxy, Delta Kossel 3D Printers Upgrades and CNC Machine"
brand: "iverntech"
price: "€ 154.48"
currency: EUR
in_stock: true
reviews_count: 5
url: https://www.desertcart.nl/products/563238645-iverntech-mgn12-400mm-linear-rail-guide-with-mgn12h-stainless-steel
store_origin: NL
region: Netherlands
---

# Iverntech MGN12 400mm Linear Rail Guide with MGN12H Stainless Steel Carriage Block for Ender 3, Corexy, Tronxy, Delta Kossel 3D Printers Upgrades and CNC Machine

**Brand:** iverntech
**Price:** € 154.48
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Iverntech MGN12 400mm Linear Rail Guide with MGN12H Stainless Steel Carriage Block for Ender 3, Corexy, Tronxy, Delta Kossel 3D Printers Upgrades and CNC Machine by iverntech
- **How much does it cost?** € 154.48 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/563238645-iverntech-mgn12-400mm-linear-rail-guide-with-mgn12h-stainless-steel)

## Best For

- iverntech enthusiasts

## Why This Product

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

## Description

Iverntech MGN12 400mm Linear Rail Guide with MGN12H Stainless Steel Carriage Block for Ender 3, Corexy, Tronxy, Delta Kossel 3D Printers Upgrades and CNC Machine

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Iverntech |
| Manufacturer | Iverntech |
| Item Weight | 381 g |
| Package Dimensions | 43 x 4.5 x 4.39 cm; 381 Grams |
| Item part number | AW013 |
| Are batteries included? | No |

## Images

![Iverntech MGN12 400mm Linear Rail Guide with MGN12H Stainless Steel Carriage Block for Ender 3, Corexy, Tronxy, Delta Kossel 3D Printers Upgrades and CNC Machine - Image 1](https://m.media-amazon.com/images/I/51mkmKoJijL.jpg)
![Iverntech MGN12 400mm Linear Rail Guide with MGN12H Stainless Steel Carriage Block for Ender 3, Corexy, Tronxy, Delta Kossel 3D Printers Upgrades and CNC Machine - Image 2](https://m.media-amazon.com/images/I/51r+GuaqUtL.jpg)
![Iverntech MGN12 400mm Linear Rail Guide with MGN12H Stainless Steel Carriage Block for Ender 3, Corexy, Tronxy, Delta Kossel 3D Printers Upgrades and CNC Machine - Image 3](https://m.media-amazon.com/images/I/51nzbd8uMWL.jpg)
![Iverntech MGN12 400mm Linear Rail Guide with MGN12H Stainless Steel Carriage Block for Ender 3, Corexy, Tronxy, Delta Kossel 3D Printers Upgrades and CNC Machine - Image 4](https://m.media-amazon.com/images/I/51VUU90AInL.jpg)
![Iverntech MGN12 400mm Linear Rail Guide with MGN12H Stainless Steel Carriage Block for Ender 3, Corexy, Tronxy, Delta Kossel 3D Printers Upgrades and CNC Machine - Image 5](https://m.media-amazon.com/images/I/61aA9GXnxWL.jpg)

## Questions & Answers

**Q: How hard is it to trim these down? I need a length of 440 mm and would probably be getting a 450 and trimming 5 mm off each end.  what tool would be**
A: An angle head grinder and thin abrasive wheel will go through it just fine. Dip it in water if it gets too hot. Completely tape the carriage to keep out dust. (Don’t take it off.)

**Q: What size t nuts do you use**
A: Hi, M3 t nuts and hex screws are suitable

**Q: Are the holes in the carriage threaded?**
A: The holes in the carriage are tapped 3MM. The rail holes are drilled and counterbored for 3MM sockethead cap screws.

**Q: Are these bearing blocks pre-loaded?**
A: Yes. Only thing i recommend doing is to clean well (i used a automotive part cleaner spray solvent) and lubricate properly when you get them. Mine are still performing flawlessly.

## Customer Reviews

### ⭐ 







  
    引っかかる
  
  

*by H***E on Reviewed in Japan on 22 February 2022*

3Dプリンターでの使用目的で購入。特定の場所で引っかかりがありレールが悪いのかとも思いましたが悪い箇所が見つからず、ガイドブロックを分解清掃グリスアップを行いました。そして余計に悪くなるという結末。使用する気が失せて別のメーカーを購入しました。

### ⭐⭐⭐ 







  
  
    With $8 and some time invested, they can be pretty good rails
  

*by N***A on Reviewed in the United States on 26 January 2019*

ordered 2 for my 3d printer. one barely moved at all, even when vertical. the other moved and would stick in the middle then move again if you shook it. I was less than enthused.the consensus across the internet was "you get what you pay for" and "cheap Chinese rails wont ever work". still, I didn't want to just give up and return them without trying to see if I could fix them. I tried spraying them with liquid wrench spray lubrication, it helped very very little. I watched a video where someone took apart the rails, soaked them in a solution of alcohol and water, put them back together, and re-greased them. The claim here was that they were "gunked up" from the factory and needed to have better lubricant applied. I tried this and then applied "super lube". This did not work.Finally I found a video of some random kid on youtube. He replace the bearings with https://www.amazon.com/dp/B015RKOZ7G/ and also claimed this changed his barely movable rails to smoothly functioning ones. I was fresh off of watching the previous video about cleaning, and since that had failed, I was skeptical of this, but they were $8, so I figured why not. I just completed the first rail, applied some "super lube", and it now moves with the slightest tilt of one side or the other. (note: if you do this, the part I mentioned above comes with 100 bearings, each side of the carriage needs 33, and there will be a slight gap left over).so, why 3 stars? whats the bottom line? the bottom line is the consensus on the internet is largely correct. there isn't really a middle ground with rails. there's expensive ones that work really really well and come ready to go, and everything else is pretty bad. these however, are super cheap, and can be remedied for not much more of an investment. $8, some patience, a clean, and re-lubrication, and you've got a solid linear rail. if you want a cheap, good solution (albeit with some work involved), these are for you. if you want an out of box solution, be prepared to pay much more.

### ⭐⭐⭐⭐⭐ 







  
  
    Worth the $$ if you prep them correctly
  

*by O***K on Reviewed in the United States on 5 June 2019*

I have torn my primary 3D printer down to replace the rails.  These are not the cheapest rails available but they are certainly economical.  They are very rough and packed with shipping grease from the factory.  At first I thought they would be unusable.Begin by spraying the entire rail and block assy with Brake Cleaner.  This will get most of the gunk off.  Then remove one of the red retainer buttons, hold the rail upside down, and over a towel or thick rag, carefully slide the Carriage Block off.  I would then spray the bearings and block again with Brake Cleaner.  At this point you have a choice - go with the original ball bearing or swap them for better quality.  I ordered two sets of https://www.amazon.com/gp/product/B015RKOZ7G/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1precision ball bearings.  I took out the originals and replaced them with the SAME NUMBER of the replacement balls.I then sprayed the inside of the block with Super Lube 31110 (Spray) and worked the balls round the track.  The then put a small amount of Super Lube 92003 Silicone Lubricating Grease on the balls and track.  (Believe me, the 3 oz tube will last for years!)  I sprayed the rails with the Super Lube spray and wiped them down with a clean cloth.  Then I reassembled the block onto the rail.  Swipe the block back and forth and it should be a smooth as can be.Please click the "Helpful" button below

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-19*