2-Pack CR10 Z axis T8 Anti Backlash Spring Loaded Nut Elimination Gap Brass Nuts for Upgrade Ender 3 Ender 3s Ender 3 Pro V2 CR-10 Tornado 3D Printer 8mm Acme Threaded Rod (Nuts)

I installed a pair of plastic anti-backlash nuts on my Ender5+. That worked out so well that, even though I was having no trouble with my Ender3, I installed one on it too. The Ender3 has only one leadscrew, but I may install a second one soon. Backlash isnt really a problem on the Ender3 but I often use Z-hop, so it may prevent a future issue.

the backlash nuts are larger than the Oldham couplers off the same listing. The holes do not match up with the coupler or the printer. otherwise seem to be well made

The description called this a set so I ordered one thinking that it has 2 couplers, but no its only a single one. 1 star because of this

So, I can’t say for sure that these things are working. But, they are tight and so are my lead screws so I think they are. They are probably one of those things that you don’t see working but know they are. Would buy again.

This was easy to install. And it removed the slack from my gantry. I do wish they supplied at least one extra washer and screw set. As small as the washers are I was easily able to lose one. But that was my mistake.

I was having issues with layers while 3d printing. I narrowed it down to the Z-axis on my Ender 3 V2. I ordered this kit and havent had the issues since. I definitely recommend.

Fit perfectly on my older Ender 3. Fit right on my lead screw and you use the 2 original screws to bolt in into place. Watch TH3Ds video on fitting these if youre not familiar. Nice it comes with 2 so you can easily fit to dual z axis. Z hop and overall Z layer accuracy has never been better, but if you have major Z axis issues dont expect this to be the magic fix.

Fit well on my ender printer. Good product so far

Fits the stock z-axis bracket fine, but had a slight fitment issue with my second z-axis bracket. Filed the holes a bit bigger on the second bracket and it fit fine. Nuts might seem like they dont fit the lead screws at first. May take some persuasion to get them to seat into the threads on the lead screws.

a1 overall