350mm MGN12 Linear Rail Guide with MGN12C Carriage Block for 3D Printer and CNC Machine

Got this to update my Voron to the R2 spec. Wasn't expecting the rail to be seemingly pre cleaned, and only generously coated in light oil. Moved like a dream, just enough preload to not just zip off into the distance by accident, but smooth as butter when moved without even a hint of play in the rail/carriage. I am quite please with this rail.

Smooth motion. Tight tolerances. I'm not sure if the rail is made from stainless steel. Nice if it were.

These came packaged with rust prevention oil, but not so coated that you needed a rag. I installed some extra Uxcell carriages because I need 2 on each rail. I found that the black carriage these come with do not glide as well as the Uxcell brand carriages. They work just fine for my Ender 3 V3 KE on the Y axis. There's a youtube video showing how to use these to upgrade your Y axis.

Picked up a pair of these to upgrade my Ender 3 S1 Plus Z axis and get rid of the pom wheels. Rail was straight, carriage head ran nice and smooth!

I got this rail in a sealed bag and expected to have to open it, clean it and relube it. I was pleasantly surprised that it didn't need anything. (other than to be installed) I have never bought a linear rail that didn't need cleaning before. Not that it is hard to do but I just expected to have to. I will look for this brand for my next linear rail purchase.

This block was covered in machine oil that had become sticky. I had to take the block apart to clean, replace the bearings, and oil before use. In the process of reassembly, one of the retainer wires flew off and got lost. Piece of garbage!!

These cost a bit more than some of the others but are well worth it. I did minimal cleaning, lubed and installed and they slide effortlessly.

I ordered two of these and one of them was just loose in the bag with the ball bearings all over the place. They put them on small 3d Printed rails but there is nothing on the ends holding them on. So once I spent an hour putting these tiny bbs back in the carriage I put them on the rails. They don't fit correctly and wobble back and forth.

Buon prodotto, come ci si aspetta, consigliodi pulirli bene prima del montaggio, le ho usate per un asse z quindi non mi importa dell'usura e va benissimo perchè non sembrano avere lasco, ve le consiglio

habe die Schienen als Ersatz für sehr schlecht laufende China rails gekauft und muss sagen das sie für den Preis absolut tadellos sind. die plastikteile sind absolut sauber gearbeitet und sehr passgenau und auch von deutlich besserer Qualität als bei den standard 25€ schienen. also wer keine hiwien oder bosch Rails kaufen will, ist hier genau richtig. Einsatzort Hypercube Evolution RS

Gut, ich kann nichts negatives an dem Produkt feststellen.

Sehr schöne Schienen

Also mit Hiwin leider nicht zu vergleichen. Sehr dreckig und schlecht verarbeitet. Man braucht viel Mühe um die Linearschiene nutzbar zu machen. Auch wenn man sie leichtgängig zum Laufen bringt, ist die Führung und der Wagen schlecht geschliffen bzw. Ausschuss.Nach ca. einem Jahr war die Führung komplett verschlissen und musste getauscht werden.Für Prototypenbau ok aber für 3D-Drucker, wo es auf Präzision ankommt, nicht zu empfehlen. Besser das Original kaufen!