Shaft Collar for SBR20 Linear Rail Stop, 20mm Bore 40mm OD 12mm Thickness Aluminum Alloy Anodized Clamp-On with M5 Set Screw, Locking Collars for CNC and Linear Motion Systems

Perfect fit on my linear rails. Very easy to install and works as designed. Love the product and price.

Great product

These work great on my router sled for manual stops. My only criticism would be that when you tighten the screws they tend to make a divot in the rail bases, so micro adjustments after those divots are in place become more difficult. But this may be due to the softness of the rail base metal, not a failure of these stops.

Glad to find the right stuff

Just know that these are very lightweight. I thought they would be a lot more solid and have more strength, but they are light. I have a feeling that overtime. The threads will wear because the material seems pretty “soft” for metal. Very light aluminum feel. Idk, they are fine, and I measured them precisely to go on an exact size stainless steel rod and I had to file the inside of them down lightly. I checked the measurements multiple times, yet I still needed to open them up a bit to get the rod to move through. I tried using a little oil first before I filed them, but it wasn’t enough. So maybe consider the measurements as being a possible bump in the road. It was no big deal to file them out, but I would’ve preferred not to. I’m using them to lock the rails going in one direction on a router sled. Also, I will mention that I was not a fan of the angle of the screw going into the side. It was a really messed up angle and I’m not sure if I’m using the product wrong or it wasn’t meant to be used for what I’m using it for but this direction of that screw complicated things.

Very Happy

Provide a good solid mechanical stop on my 16mm rails. Easy to install.

I thought I could get by without these. Nah. Notta. No way. I caught my sled about twenty times trying to fall off the rails. Just spend the money and get the lock collars.

Excellent qualities..fits perfectly on various linear guide rails 👍

Son de buen material y se ajustan perfectamente en el riel de 20 mm.

I filed smooth the mating ends of the securing 4mm screws so they don’t grab and misalign the stop position when fully tightened but they are accurate in size and work as intended.