OrangeA Linear Rail 2PCS SBR16-2000mm, 2xLinear Guide Rails and 4X Square Type Carriage Bearing Blocks,CNC Rail Kit

The media could not be loaded. A superior set of linear guide rails. Exceptional build quality. Smooth and quiet. Precise accuracy.I used these with the SpeTool router sled. All the screws included with the tool exactly fit into the rail bearing blocks.I now have a very professional router sled for a very affordable price.This is my current favorite jig in my home shop.Exceptional value with high build quality, and durability.Highly recommended!

I recently bought a stereo microscope head and needed a stand for it. The best stands are double arm boom stands, which use two linear rails. I have a 3D printer, so I figured, why not just build one? Looking at McMaster-Carr, linear rails and pillow blocks are EXPENSIVE. I looked elsewhere online, and they still weren't anywhere near what I wanted to pay. So then, of course, I checked Amazon and found these. I probably could have gotten away with the 16mm rails for my application, but I decided on the 20mm x 1m.First of all, they're super heavy. I guess that should be expected. They have a nice coating of oil on them, which seems to get on everything like anti-seize does - nothing a little brake cleaner can't take care of. The rails are straight and have a nice polish, and they measure 20mm +0.1/-0.2. The ends aren't chamfered, which would have been preferable, but that's an easy fix. The pillow blocks seem well made, with recirculating ball type bearings in them. Putting the two together, the blocks slide nicely on the rails, though they're a bit loud. The dust seals on the blocks seem to be well-fitted and there's no discernible play in the bearings.I need to cut these rails down, and I did so using an angle grinder with a cutoff wheel. I then polished and chamfered the ends with a 120 grit flap disc. Cutting took a couple of minutes per cut. You could probably do it with a hacksaw but it'll take you all afternoon. Out of curiosity, I tried drilling into a piece of the rail and I was able to drill without too much problem, so the rails aren't too terribly hard.Overall, these are a great choice if you need a set of linear rails, pillow blocks, and mounting blocks. I'll be posting my build to Hackaday and thingivese, and I'll be recommending these rails to anyone looking to build their own microscope stand.

PURCHASED THESE FOR A SLAB FLATTENING TABLE I MADE. SEEM TO WORK WELL AND ARE OF GOOD QUALITY.

These are not to bad for the money, however the bearings have more slop than they should. I would think you should not be able to feel any slop but there is some and there is no way to adjust. For my purposes this is not a problem but be aware of the looseness. And the mounting threads are not tapped very deeply - plan on chasing the threads (M6) and deepening them if you want to use decent-length screws. I like long screws in aluminum. The hole is the right diameter for tapping deeper, no drilling needed. Like I said - they work fine in my app and might in yours too.

Great rails. They are strong and straight. I used them to build a router sled and I couldn't be happier. They slide very easily and provide great support for my router. I get a nice smooth surface every time. As long as you don't push down too hard, you don't have to worry about the bar bending. Highly recommend.The only downside is it doesn't tell you the tapped hole size so you need to bring the slide pieces with you to the hardware store when you figure out how you're using them so you can get the correct size.

Honestly quite happy with them for the price.Wish they had a bit more preload, buts thats cause I wish they actually had a bit more friction. I used them to replace the door slides on my CNC lathe. Its frankly to easy to open now!Ive already got plans to get some more for another project.

Amazing deal for the money. Straight with almost no play when all four are working together. Holes are tapped all the way down. Drag adjustment screws are very useful.

Very sturdy rails for Router sled table.