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- Installation screw size: M3×8mm.
- The guide rail may have a tolerance of ±1mm，but this does not affect normal use.
- The mark on the bearing surface is only the mark made by the factory, not a scratch.
- Normally each side is lack of 1 or 2 balls.The carriage block will get stuck easily if it is full of balls, the balls on each side need some room.
- Some lubricant is needed, the longer they are used, the smoother they will run.
Bob S.
Reviewed in the United States on April 22, 2025
They came securely packaged and work great.
Joshua
Reviewed in the United States on August 29, 2023
Even after multiple attempts of disassembling,cleaning, relubing, it just does not slide smooth, I can feel the ball bearings catching every quarter of a inch which leads me to believe that the ball bearings are out of spec and not round at all. I’ve bout several from another vendor and they are like butter!! Unfortunately I can not recommend these rails to anyone!
Vladimir
Reviewed in the United States on June 25, 2023
I'm a CNC machinist and know good and bad quality rails and these are probably 8 out of 10 quality. Put them on my ender 3v2 for Y Axis and printed rail attachments to fit them to it.
Michael
Reviewed in the United States on April 30, 2023
So I got both rails, both looked good and decent till I tested them.One of the rails are perfect, smooth, clean movement, very little sticking if any. The other was just bad. Kept sticking, had a hard time moving, and taking off the slider it was missing roller balls.Wish I had both good ones for my mod to my 3d printer.
St
Reviewed in the United States on June 27, 2022
I got these all excited from seeing other people talk about them. However when I got this in it did not move freely, and after examining, cleaning, and resetting it still does not move correctly. Maybe I got a faulty one
Trogdor
Reviewed in the United States on February 12, 2022
Solid rails for my ender 3 so far. Got 2 more for the y axis, working great.
jeannie
Reviewed in the United States on February 20, 2021
Not bad. Needed some light lubricant and to be worked for awhile to loosen up but definitely worth the price.
Rocky
Reviewed in the United States on April 7, 2021
This is for a 3d printer that I'm building and its straight so everything slides easily after cleaning and oiling up the rail. The finish is great and shiny.
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