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1 * T8x8 300mm lead screw
1 * T8x8 brass nut
The lead of the thread is 8mm, which means that the nut will move 8mm if the nut turns one circle.
The advantages of the lead screw are:
Large load carrying capability
Compact
Large mechanical advantage
Precise and accurate linear motion
Smooth, quiet, and low maintenance, very suitable for 3D printer z axis.
Minimal number of parts
So this lead screw is very suitable for 3D printer Z axis, such as Ultimaker and Prusa i3.
The screw type of this lead screw is ACME thread.
ACME Threads are generally stronger than square threads due to their trapezoidal thread profile, which provides greater load-bearing capabilities.
Reviewerman
2025-08-25 13:05:25
They fit, the screw holes are the right distance apart, smooth action. Really nice.
Justin
2025-08-23 16:39:50
work perfect
Another Shopper
2025-08-21 17:46:35
Disclaimer: I didn't use the included bushing. I installed it with a two-piece spring-loaded anti-backlash nut, which fits perfectly. Travels smoothly and there's no wobble at all. I had to trim mine down a bit because a 300mm version wasn't available, but that posed no problems.Mounting it into a spring coupler made for an M8 threaded rod was a little tricky, but I found that I was able to spread open the spring coupler by threading a screw into the "wrong" side of the outer clamp hole and tension it against a thin metal shim to force the opening apart enough to get the T8 screw in as deep as I needed it, then release the tension and install a grub screw in the center grub screw hole. Because the free side of the clamp is the only part that gets offset, it still left the lead screw perfectly centered with absolutely no visible artifacts on printed objects. Perfectly smooth walls!
Mike D
2025-07-25 15:47:34
Arrived later than expected, but seems to be of good quality and absolutely straight. Great improvement over the original that came with my Ender-3.
AGBaker
2025-06-19 21:44:09
Ordered these to use on my Creality CR-10S Pro V2 to help eliminate issues with the X axis gantry sagging when shut off. Parts looked very nice when I received them but unfortunately I did not discover until after I had cut one of the nuts to clear the frame on the printer, that the bolt pattern on the nut did not match the bolt pattern on the printer. This isn't a flaw in the part, the backlash nuts appear to be very nice, they threaded on to the lead screws very smoothly, but I wouldn't recommend them for anyone w/ a CR-10S Pro V2.Nothing in the description said they would or would not work for my printer, so it was on my to ensure that they were correct, and I didn't do that.
Jon
2025-06-08 19:23:26
I installed a dual z kit on my Ender 3 v1, however, the lead screw I was sent with the kit happened to be bent causing it to spin outwards when moving up and down. I ordered two of these screws so they'd be the same size, and both fit into my Ender 3 perfectly. The brass nut didn't fit but I didn't need it as the stock ones worked fine. The only issue I noticed was one of the screws seemed taller than the other but that may have been a user error when installing them. No more spinning!
Charles
2025-05-04 10:57:41
I like that this pair of anti-backlash nuts arrives in individual baggies inside of a larger one, especially since I only need the one for now. I have been impressed with the very tight fit between the two halves. This fit is critical since any play between the upper and lower contact flanges will represent the amount of backlash this nut would have. Since the fit is so tight there isn't any perceptible play between the two halves, which is ideal.I used this set to reduce the backlash on my lead screw for my longer lk4 pro. The factory nut was actually pretty good but this eliminates yet one more source of error and variance. I reused the factory mounting hardware so it was a direct replacement and easy swap.
Lando L
2025-04-18 18:25:14
I ordered two rods and the rods themselves seem decent. The shipping honestly was okay each rod came packaged inside of it's own box with some foam to support it, that box was then tossed into a larger box with no support. That seemed kind of pointless as the smaller box got tossed around inside of the bigger box ultimately one rod came warped while the other seems pretty straight.
Cameron M.
2025-04-16 17:47:32
Well packaged and shipped perfectly
Hector Ventura Hernandez
2025-03-05 13:03:18
Muy buena calidad y muy buen embalaje
Kibo
2025-02-24 15:10:09
Ich habe an der Spindel nichts auszusetzen, sie funktioniert 100 % wie sie soll und hat die Druckqualität erheblich erhöht (zuvor war eine Gewindestange verbaut gewesen). Die Steigung beträgt 8 mm (wie vom Hersteller angegeben). Ggf. muss die Steigung in der Firmware des Druckers angepasst werden, damit das Übersetzungsverhältnis stimmt. Hierzu gibt es Anleitungen im Netz.Die Mutter auf der Gewindestange hat auch deutlich Spiel. Für die Verwendung in einem 3D-Drucker ist das perfekt, da die Gewindemutter nicht die Aufgabe hat, irgendetwas in horizontaler Richtung zu führen. Diese Aufgabe übernehmen die geschliffenen Achsen (inklusive der Lager), die normalerweise im Drucker verbaut sind. Würde die Mutter kein Spiel haben, wäre die Konstruktion deutlich statisch überbestimmt und bereits kleine Unterschiede der Geometrien von Achse und Gewindespindel würden dazu führen, dass sich beim Drucker irgendetwas verklemmt. Auch das (geringe) horizontale Spiel der Mutter ist kein Problem, da die Druckplattform durch die Schwerkraft die Gewindemutter nur in einer Richtung belastet und die Kraftrichtung nicht wechselt.Also klare Kaufempfehlung für die Verwendung im 3D-Drucker, damit macht man nichts falsch.
Luca Bartoli
2025-02-04 18:29:14
The media could not be loaded.
Daniel
2025-01-21 15:38:29
I ordered 2 lead screws for a project, and one of them is bent and the other was perfect. I don't recommend this seller for low QA. Spend a bit more and get a quality lead screw.
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