2PCS HGR20-300mm Linear Rail + 1PCS RM1605-300mm Ballscrew with BF12/BK12 Kit, DSG16H Nut Housing, Coupling, Slide Blocks Linear Guide Rail Ball Screw Set for DIY CNC Routers Lathes Mills

As far as I can tell these are amazing. I haven't had a chance to put a dial indicator on them but they will work a 1000 times better than the V wheels that were originally on my machine. I ordered three sets and Amazon made the error of showing that all 3 had been delivered when the first one showed up. That was a little confusing but totally not the sellers fault.Good product, I recommend them.

very tight, strong and smooth. Replaced X,Y and Z axis. All I had to do was make a custom bracket for the stepper motors on my rig. Everyone's rig will be different. Now Im cutting aluminum on my DIY desktop cnc thing..

The product is a advertised and was at a reasonable price. Got the 2000mm version which I was concerned about shipping. The rails and screw were packaged well and were fine. There was one issue though with one of the smaller components but the issue was quickly resolved. Overall a good experience.

Smooth, straight parts, really heavy duty, but missing 2 cheap parts. Fulfillment by amazon says send the whole thing back, can't contact seller direct and sure don't want to send 25lbs of steel back over 4 oz of missing aluminum, so keeping it.

Linear rails wouldn't travel smoothly and were quite grippy. However, they were dimensionally accurate and rigid.Ball screw was low quality and I've had some issues with it jamming up consistently when run at high speeds. I wouldn't expect it to work for long term use.Definitely some backlash, but nothing egregious.That being said, these were dirt cheap and they did work. I'd recommend these for any hobbyists looking to build something with these for the first time.

Building a 5'x5' cnc so I had a budget in mind i wanted to stick to, and these fit the cost of what I was looking to spend. I bought 2-1500mm sets, and 1- 400mm set. They are great quality! The fitment of the everything was way better than I could've imagined for being cheap. No slop at all.Shipping was quite fast as well.Only problem I had was one set didn't have the bearing blocks, however I emailed the seller and they got in touch with me within a few hours!, and got the missing parts shipped super fast. Very impressed with their customer service. Any questions I had for them were answered very promptly. If I build another CNC ever I will definitely come back to this seller

Like the packaging and how well the rails and especially screw was protected. Quality feels very good and an initial inspection shows parts are nice and straight. Should work well to upgrade my cnc y axis with a little custom bracket fabrication.

I haven’t been able to install it but it looks very steady and all parts they advertised are there!