200mm T8 Tr8x8 Lead Screw and Brass Nut (Acme Thread, 2mm Pitch, 4 Starts, 8mm Lead) for 3D Printer Z Axis

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.

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!

work perfect

They are exactly as described. I have ordered these twice for a project and they have worked perfectly.

It is okay. The threads have a variation every 4mms down the whole part .1mm. .1 mm I know small right? But 50mm later that is huge. Must be a die cut thread with a warn edge in one slot instead of a acme thread head cutter? Very weird error for a acme thread. Also seems deeper in some parts cut. I think this screw was cut with a bad set die or head cutter as the rod was broached. On the other hand! Nut was cut perfectly. And it also was perfectly lose on the screw. I tossed the nut on a old 8t acme I had and it fit nice. So kinda disappointed, the old 8t has less ware then the new one.

Got this set to replace 2 worn rods on my ender 3 max. They stick out the top of the machine by about 3/4 of an inch but do a great job, Didnt use the holders it came with, instead I used spring loaded ones from creality

There's not much to say about the leadscrew itself, really. It's pretty standard, with an amount of play that's neither exceptional nor remarkably bad, but one thing that I really appreciate: it was actually well packaged and arrived perfectly straight. It was in a box held in the center with foam pieces. 90% of the time I order linear motion parts they come in a plastic bag, or a tube if I'm really lucky, and often they get bowed by this. I had to leave a review out of sheer appreciation for a vendor that actually gives a crap if I receive parts in a usable state.

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.

Well packaged and shipped perfectly

Muy buena calidad y muy buen embalaje

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.

The media could not be loaded.  Oltre il costo indecente (pensavo fossero due a questo prezzo) è arrivata una barra completamente curva.Pensavo di andare sul premium e invece è inutilizzabile, perché peggio delle mie che voglio sostituire. La qualità sembrava anche buona, ma la curvatura vanifica qualsiasi altro pregio.Reso immediato

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.