Linear Rail 2PCS SBR12 800mm Linear Guide Fully Supported Linear Rail Shaft Guide 12mm with 4PCS SBR12UU Slide Bearing Block, SBR12-800mm Linear Motion Guides Kit for CNC Machine

packaged good. real good lol. box was a bit banged up from the mail people. but the rails where protected inside the box thank god. they or great rails i am very happy. thank you. would buy again.

They are noisy and you can fill the balls as they contact the rod. The first two treads are good, the rest, you will have to pick up a tap M5-0.8. These act like they are metal powder formed when I tapped these.

The glides run true and can be adjusted for how tight they are on the rails. They worked great on my custom built piston ring file.

The small ball-bearings within the product are prone to popping out. 6 alone were dislodged just installing the rails, so extra care with aligning is required.

There was quite a bit of play in the guide blocks. I would definitely opt for hgr15 or hgr20 style rails and blocks, if you want any amount of accuracy in your build.

Works as advertised, but too flimsy for building a router based leveling sled. Nice matter how slow the new, very sharp, expensive bit would chatter and leave gorges in the end grain cutting boards. If you're building a flattening jig, go for more robust raiks.

Excelente producto muy recomendable buena calidad de material