ANWOK 2Pcs Linear Guide Rail HGR20-600mm + 1PCS SFU/RM1605-600mm Anti-Backlash Ballscrew with BF12/BK12 Kit, DSG16H Nut Housing, Coupling, Slide Blocks Linear Rail Ball Screw Set for CNC DIY

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

The rails arrived in working condition with protective oils.

De Gran Calidad

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

All parts look very professional and will work great for my "Z" axis

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 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.

These rails didn’t include the fasteners and dust caps as shown in the pictures. You will have to purchase these separately which you should take into account when comparing prices! Very misleading pictures.

Muy buena calidad. El movimiento es fino

Bought 4 of these rails which comes with 8 bearing blocks, however 7 of the 8 were the same except 1. The threads were also tight on that one.

Look better in hand than advertisement photo and heavy for such a small package wish the supplier had more sizes like 20mm rail 1500mm long in sets of 2 or 3 pairs for better pricing. Better prices make more sence for home biulders like me. Good deal if they stay tight and only time and use will tell that. Thanks