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

With a bit of care these work well. The machining is a bit rough. I recommend cleaning and re-oiling before use. If not the bearings will chatter instead of moving smoothly.

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.

Arrived in good shape. The carriage block slid fairly easily. I degreased mine with dish soap and water, then used denatured alcohol to get rid of the water. Sprayed with Teflon and let it dry, then used a bit of Super Lube on the rails to distribute over the bearings.Two of these went on an Ender 3 V2 Y-Axis along with a 24 dollar set of brackets. It's only been two weeks, but the bed is much more stable (no give when hand manipulated), and no POM wheels to adjust! No Y-Axis slippage and did I

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

If you lose any bearing balls in one of these, consider it completely useless. 3/32" bearing balls are too large and will make the rails very hard to move. If you get a defective rail it will miraculously be even worse if you try disassembling it, cleaning and lubing it. Of the seven rails I have, one is so bad that it won't slide even if you hold the assembly by the carriage at a 90 degree angle.

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.

Smooth. The ones I got are smooth. However, there were some issues, once I took the carriages off for installation and tried to re-insert them back onto the rails. The ball bearings popped out like mustard seeds in whole grain mustard. The retaining wire is. sufficient, so long as the carriage is on the rail. I noticed that there were gaps in the ball bearings, so these carriages probably weren't filled to the max.Having said that, they work well. Good price for a decent product, just not a top

Unlike many of the Chinese linear rails, this arrived running amazingly well right out of the package.As a precaution I still flushed out any existing lubricant with WD-40, and then added 3-in-1 followed by Super Lube ptfe grease.Unfortunately i cannot speak to the consistency of quality as i only ordered the one.

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!