Customer Reviews for VEVOR Linear Guide Rail Set, SBR20 1800mm, 2 PCS 70.9 in/1800 mm SBR20 Guide Rails and 4 PCS SBR20UU Slide Blocks, Linear Rails and Bearings Kit for Automated Machines DIY Project CNC Router Machines

havnt use them yet but semes like thay are good

48 inches, straight, no binding. Bearing blocks have smooth motion. Glad i bought 3 sets. No trouble with any of them. 4 stars because i have never rated anything 5 out of 5. These are beefy and worth the price to me.

Bearings are a bit rough. Rail is straight and true until the end screws securing it to the rail. The rail bends up a little on both ends. Side to side is good.

I would not use these on a CNC machine, but for making tight tolerance slides for other applications, they are just fine.The linear motion bearings can be a bit rough when they roll, catching at points and rolling fine at others, like the balls have flat spots, but can’t visually see anything wrong with them.

I used this product for a slab flattening jig with my router. Even with a very dusty environment, the bearing slides easily, maybe even too easily as I went off the end of the rails once, but that is really my bad. I wish that there were female threads at the end of the rails inline with the rail axis to facilitate adding a stop to prevent going off the end. When it went off the end, a single ball bearing did dislodged and was lost, but that still didn't prevent it from moving smoothly on the rails even after that.

Great rails wish they would include a way to lock the bearing block or ship collars with it.

These are perfect. They were just what I was looking for and they fit like they were custom made for me.

Have ordered several of these. Most of them are great for what they are. Have had to retap a couple of the bolt holes, but for the cost they are great. Wish the mounting holes were in more consistent locations. Fine for wood mounting, but if planning on an aluminum frame it makes planning difficult.

Bought these to upgrade an ancient cable drive ShopBot for my guitar-making hobby. For this application they look like they will work great, far better than the screen door rollers and unistrut used on the bot originally, and better than my previous upgrade to v-groove bearings and steel angles. For sure good enough for my occasional woodworking needs. Like a previous reviewer, I received four bearings not listed in the description, so now I have spares! I don’t think I’d put these rails on something that I rely on for a living unless I bought spares, and they seem a little noisy but hey, when the router is running I won’t hear it anyway.

Nice finish, looks good, bearings roll well.