CNCMANS Linear Rails and Bearings Kit, Including 2Pcs SBR20 800mm Long Fully Supported Shaft Guide and 4Pcs SBR20UU Linear Bearing Slide Block X Y Z Linear Actuator for CNC Equipments

Se desliza muy bien lo utilicé para un CNC manual

These did what they claim they do. No issues with these so far, at all. So I ordered more as I have many uses for them.

Great rails but with just a little bit of flex. I used these for a router sled. There were two drawbacks. The first was hunting for the correct screw size of the holes on the mounting blocks. (Metric6 by the way) The second if a little bit of flex in the rails. For a full size router I may have to go back and add some steel underneath the rails so they don't sag.

Used to build goose house opener with 18" lift, holding the two sides of big sliding doors in place. Initially, I tried to buy 1 inch U channel, but those rails are cheaper, stronger, and smoother.

Good quality, great buy