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)

Easy to upgrade from standard.

works great for my ender 3 v2, wanted some way for anti backlash for my ender and this worked perfect.

Doesnt fit the ender 3.

I tried, but they would not screw onto the 8/2 leadscrew on my Tenlog, and I didnt want to damage anything.

I got these to install on my Ender 3 S1 Pro and one of the two that came were too big. It also seemed to be much poorer quality than the correct size, so perhaps a counterfeit? Notice the burr or machining defect stick out in the picture? The smaller, correct sized coupler didnt have that defect. Overall not a great first impression, but Im going to return one and see what I get back from the seller

The bolt holes do not line up.

The face is not flat on the anti backlash screws creating so much play the antibacklash screws completely defeat the purpose of having them installed and I cannot use the stock screw as the connector bolts have been machined slightly too far apart for the stock screw, meaning you have to use their terrible screw instead.

I loved this product. It really helped with my elephants foot problems! That and turning down my heat settings but you get the idea

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.

Fit my CR3 like a glove and solved two problems instantly. Improved size of calibration block by better than 0.1mm. Also reduced bumble foor to less than 0.1 mm. My original one was worn out after 2 years of use and this one fixed it up to be as good as new.