2Pcs 1000mm /39.4 inch Linear Rail with 4Pcs SBR16UU Linear Bearing Sliding Block CNC Parts for Fully suppoeted Shaft Rod

Seriously super sturdy combined with the bearings smooth operation made it a breeze to create sliding saw and router.

Worked out great. Built $800 jig for $150. Very smooth come in easy to assemble. If I had a concern it would only be due to dust getting into the bearing surfaces as time goes on. Extremely functional and well built.

My seller, GUWANJI, replaced my shipping damage quickly and graciously. Thank you. Their product is fine.

Smooth rails. They were straight and sturdy, very nice weight. The sliders (or whatever they are called) are ball bearing and smooth. Add a thin film of oil and it’s like ice. Used as a router sled build and it did very well in high dust environment. The only problem encountered. Supplied hex head thumbscrews for the slider blocks. Unnecessarily long. It was an issue that I saw on a video but forgot about when I ordered. Can’t remember the length supplied, but too long and I had to make a store run and scrounge the specialty fastener section for anything to work. Had to mix and match items but found a solution. An annoyance that didn’t need to be present, but the when corrected the rails are great.

We used these for a custom build of a display that needed to be assembled and disassembled after each show. They are hardy duty and worked as expected.

Worked extremely well to make a router sled for flattening slabs. One rail was damaged in shipping and the seller made it right immediately. Good customer service

These are nice rails with good support extrusions. Unfortunately the specified mounting hole locations are hacked up and ruined because they are carelessly drilled with inaccurate locations using a drill bit that is far too big, then followed up with an even larger drill bit to remove the burs, which creates a sloppy, inaccurate, and inconsistent countersink. PLEASE STOP DOING THIS! If you cannot drill the supports properly then please offer the supports without mounting holes and let the customer take the proper time and care to drill their own mounting holes. Customers have to abandon the sloppy holes and drill their own anyway if they want accurate locations with proper size holes that screw heads will not fall through. I raised this review from 2 stars to 3 stars due to efforts made by the seller to make things right, including a full refund! I am keeping the product because I do not see any alternative. It looks like these kinds of inexpensive supported rails all to have this same problem - they all appear to be carelessly drilled by hand, and drilled with grossly improper tools. I am able to work around the problem by grinding down two opposite sides of M4 washers that span the length of the sloppy hole. GUWANJI appears to be a conscientious seller and I would recommend buying different products from them.

Just got my rails today, the 2000mm ones and one of my rails are bent. I can’t use this for flattening a slab. Updated review. Contacted seller, they apologized for the bent rails and sent out new ones that were not bent. Customer service was great and responded to all my messages promptly. Thank you.