Iverntech MGN12 700Mm Linear Rail Guide With MGN12H Stainless Steel Carriage Block For 3D Printer And CNC Parts Review

These rails are a simply excellent. The Zyltech train wrecks that would not even slide without force were sent back after a week of them promising replacements they never bothered to send. These things were usable right out of the box. They slide very easily by tilting the rail and have no lateral movement at all. They arrived at my door 18 hours after I clicked buy now, individually boxed, carriages mounted and ready to use. They mounted easily (I cut two 700's down to 520 with a dremel) and…

I been putting of this review for a bit as I was getting parts together.The rails are really good for what I'm doing with them. It helps my my printer look more robust and I don't have to tighten any V rollers anymore. I'd definitely get more of these for other printers I get later on. That being a large format printer I have in the wood works.

Out of the box the rail was sticky and one of the blocks was nearly unusable. I rebuilt these rails shortly after receiving them with replacement balls and new lubricants. One of the blocks is perfect after rebuilding while the other is still rough. The bad block no longer becomes weged on the rail but likes to "cog"/stick every few cm. At this price point and quality I would say either go for cheeper alternatives (direct from Chinese sellers) or spend 2x to get the real thing.

Very nice linear slide. Does not move as smoothly as much more expensive slide.I purchased this to make a wood working jig -- so precision is way overkill. But it is inexpensie and does the trick.

I was very surprised by how smooth these were. I previously purchased the 450mm and it was no were near as smooth as these. Very satisfied with this purchase. Using on a 3D printer build for the Z and X axis. Will see how it hold up on the X axis over time.

Great product. This brand seems much more reliable than others I found so far on amazon. Run smoothly without having to tinker with it. 6 rails from them of different types and length and all worked great. I wish I could say I had the same experience with some of their competitors. Strongly recommend

I ordered 4 rails, 300mm, all four slide great after flushing and lubing. I wasn't expecting them to come holes at end carriage for lubrication but they did. That made cleaning and lubing super easy. They are a little more expensive than other cheap China rails but worth it.

These were a nice upgrade. They took all the wobble and a lot of noise out of the printing movement. My original wheels were also starting to wear, and I was getting tired of fiddling with them.These were easy to install. Print your parts or order the other parts first. You need more than just these for the upgrade.

I had high hopes for this product, but it didn't deliver. It seems that one side of the cart is missing quite a few bearings. Leading to noise and not so smooth movement. I guess I'll have to rebuild this, but other than that. It's a decent buy for the price.

So when i got mine it slide good when the block was moved fast, but when moved slowly it would get stuck. So they said i could get a new block and they would refund me. When i got the new block it was way werse than the first. (Its important to note that it came from a different company name, but it is very possible that they are the same company that just has two different names.) So they then said they would send me a completly new rail. While i was waiting i watch some videos on how to clean

Had an issue with the product, but customer support responded and helped me resolve the problem. Product is working great, using for a CoreXY custom system I am building and am very happy with how well the linear rails are working, very smooth after a clean and lube. I would recommend them to anyone interested!