ANWOK 2Pcs Linear Guide Rail HGR20-800mm with 4Pcs HGH20CA Square Type Carriage Bearing Block Linear Rail Set Slide Guide Rod Overall Length 31.5 inch(800mm) for DIY CNC Routers Lathes Mills

i used the rails for a CNC machine. perfect for my application

These things are bigger than I anticipated, but in a good way. They have really nice rigidity and yet still took smoothly for any sort of motion application. I’m personally installing them on a mini cnc plasma table

I have yet to put this to use. My first impression is one of precision and quality at a great price.

The HGR guide rail kit arrived early, it was carefully and securely packed, and the parts were fine. I dinged this otherwise terrific product a star because it contained 16 M5x.8x16mm mounting screws, and there are 18 mounting holes. I made a trip to the local hardware store and bought the needed screws. That's what I didn't like about the sale.What I did like was the following:1. The guide rails themselves are carefully ground to final size, they're lubricated, and the edges are smooth; no cut fingers in working with this product.2. The carriage blocks are smooth, clean, lubricated, and their bearings support the blocks as they glide, and I mean glide, quietly along the guide rails. It's all very smooth. No side-to-side wobble.3. The dimensions, mounting holes, and counterbores are all very close in size. I miked the mounting width of the two pieces of 500 mm guide rails at several steps, and all points were within .002 mm. I set a caliper at the outside edges of a pair of mounting holes, locked the transit, and then moved the caliper to the other hole pairs. Snug fit everywhere. Just right.4. The cost for 2 pieces of complex shaped steel guide rails 500 mm long and four carriage blocks, delivered to me, ahead of schedule, was $50.02, plus local tax. It's a bargain.5. One more item: The carriage blocks all have serial/build date numbers within a few dozens of each other. They're identical in appearance.Tip: Have a small magnet available when you mount the guide rails. The screw heads and counterbores are a snug fit, and removing the screws without a magnet is not easy.

I purchased these slides to build a surface grinder attachment for my 2x72 grinder. These are some quality slides and a very fair price.

Everything was packaged well, no damage in shipping. The bearings run smooth, no issues so far.

I am building a new CNC machine, and I was hoping that the trucks that are on these linear rails would run smoothly but they do not. They feel real gritty as if they were not cleaned not greased or all of the above. I should not have to remove these bearings to resolve an issue that should not exist in the first place. These linear rails could be better a lot better. If there was any kind of quality inspection performed on these parts the price should be lowered. You shouldn’t have to pay full price for something you have to fix.

The rails arrived in working condition with protective oils.