3D Printer CNC Parts LM8LUU Linear Bearing Set for JGAurora Voron Monoprice Maker Select, Extra Longer Double Sealed Chrome Steel LM08LUU Bearings, 8mm Bore Size 8x15x45mm, Pick of 4Pcs

I bought a set of these to replace the garbage linear bearings that came with my 3D printer. These are a huge upgrade. Well made and good quality. I'm only giving 4 stars as some are smoother than others, so there's variance. However, they are well worth the money, enough that I bought another set and would buy them again. I think you'd be hard pressed to find other bearings of this quality at similar price points.

To my surprise, these bearing actually work. Excellent quality, running smooth, not like the ones with the square balls. I am very pleased with this purchase. I have been purchasing a number of linear motion bearing in the near past. Either they fell apart before they were installed or they ran like something that hasn't been designed yet, sand bearing.The product I purchased with this order are of good quality and do what they are promised to do.

There's a video showing a bearing sliding down a linear rod in the advertising above, it's false (at least for me). I ordered two packs of these bearings hoping they would be of decent quality since they're an amazon choice listing and cost a bit more than other no-name bearings. I found all but one of them to be incredibly "stiff" and unable to slide without considerable force being applied. On the bright side, the shipping was fast and the packaging was nice.

These shipped in a thick plastic bag with a ziploc bag style seal, then that bag was inside of another sealed plastic bag, and with good reason. These come completely drenched in grease, the inner bag is half full of the stuff. And it's that gritty, low quality stuff that you will likely want to clean out and replace anyway.The bearings are on the noisy side, as you would expect at this price point. But if you are just trying to put together a cheap motion system (3DP), these will function as intended. They move smoothly.

These bearings will drop right in to a Monoprice Maker Select Plus 3D printer, making them a perfect replacement or backup set. They are relatively quiet and well made.

These bearings appear to be hearty and well made. They installed easily and perform well. The added size gave me confidence in only installing three bearings to prevent binding. Just be sure to watch your limit switch and make sure that the longer bearing doesn't press it prematurely.

I used this for a replacement bearing in my 3018 CNC machine. It is longer than the original but has much less play or slack in it. It tightened up the Z axis quite nicely.

I used three of these to replace slightly smaller bearings on my Maker Select 3D Printer. They are working well so far!