200MM Linear Rail 2PCS HGR15 Linear Guide Rail HGH15 Linear Slide Rail with 4...

Using these for my cnc router z-axis sliders. Super tight and very heavy duty. Overkill for my router. I need one have this size. Hopefully with use they will loosen up. Very good product for the price.

Great product for the price

I'm a CNC machinist. I bought these for my personal 3d printer's y axis because I was fed up with the pom wheels. What's good: there's very little play in these. I haven't put an indicator on them but I'd be surprised if it was more than a few tenths. What's bad: they're kinda crunchy and loud. The rails themselves were clearly cut from longer stock and just thrown in a pile next to the saw, resulting in dents all over-including on the bearing races so theres minor catching and binding in many places. I get that theyre cheap but had they taken that little bit of care these actually would've been pretty nice for the price. They'll take a lot of careful work with a stone to really make right now but either way I wouldn't trust them to anything very critical. Are they good enough for me to noodle around with my ender 5? Yeah. Will I choose these for my scratch built machine? No way.

Quality is what you’d expect for the price, but only coming with 10 screws for mounting to the linear bearings when the photo shows 16, and there are 16 mounting points total is ridiculous.

Lots of dings and dents in rails price range is spot on low price low quality. Good for diy or for a beginner would buy again as the durability is very strong just expect scratch and dent…

If you’re buying these for a printer/cnc build my advice would be to look for a better brand, out of the 4 that I ordered 1 is passable I suppose. One set of two look to be a return from 5 years ago that someone fully used abused regularly, one had a chunk taken out of the rail and the ends are not cut square. The other 2 while not badly gouged and beaten up don’t look to high of quality either, to top it off none of the carriage blocks are without their binding issues even after I stripped the packing grease and put a 0001 lubricant on they weren’t smooth glide by rails. Bottom line if this is the quality you’ll get if you order them just save some time/money and don’t do it.

Se oxida rápido, y una semana me daño daño el porta balines al salir del riel por qué es muy delicado al ser de plástico

These rails are going in the garbage as they are not worth keeping. After an hour of cleanup and lubricating, moving the carriage just feels like a basket of dented ball bearings rolling on a dirt road. When held VERTICALLY the carriages don't move down. That is how much friction they have. These should never have left the factory.

Rieles que funcionan , aunque luego vienen muy apretados y sientes que se traba aunque con el uso empiezan a aflojar