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.

This may actually fit an Ender-3, but it definitely doesnt fit a Voxelab Aquila. It is simply too big, like by a half a millimeter. I found Qworks fits.

I could easily move the gantry up or down by hand on the creality CR10S pro V2 printer. Every time the printer sat idle the gantry would move down slightly as the weight is much greater on the left side. The BL touch tries to compensated for the droop but the head still hit parts of the model lifting it off the bed or breaking support. These anti-backlash devices fit perfectly. Now the gantry is straight and level. You can not move the gantry by hand unless you rotate the gear motors which is how I level it. Printed models are near perfect now.

The long dovetail section has a little looser of a fit, and there is a tiny amount of backlash in these. Cant tell how much. The more important issue is the nut hole on the Ender 3 mounting plate is not aligned on the x -axis (with my linear rail setup). Im getting the mounting holes slots and will open thhe nut hole for more clearance. Will update review if I need to use

These backlash couplers do what I want them to do on my CR-10S and thats to keep the z axis from moving when I power down the machine. Before I installed these I used this machine for 3 years and frustratingly had to level my bed almost every time I used the machine! I could literally see the jackscrews move when I powered down thereby destroying my bed levelling. These backlash couplers put enough drag on the z axis screws to prevent them from moving (usually downward) when turning off the machine. My bed stays at the proper level the next time I use it, which is the way it should be! I put backlash in quotes because this device is not really doing anything in regards to backlash and thats not its primary purpose. Its purpose is to prevent movement of the jackscrews when you power down so as to preserve your bed level adjustment.

Definitely grips on to the lead screw, use 2 on an ender 3 v2 with dual z-axis. Not sure if it does much but I would say it definitely does hold the lead screw better.

I installed these by following a video on how to install a backlash nut on an Ender. I compressed the nut, threaded the Z rod and it looked good. However, the gantry still drops at the lightest touch. Perhaps this would work better on a different printer.

like other reviews... the mount holes do NOT fit an Ender 3v2 or clone thereof... at least not without modification, i also had to take the Z rod and screw it on from the bottom side because it wouldnt start the threads from the bottom of the nut initially.... and finally... like other reviews, there is a grinding/binding noise at lower points (bed operating height) of the Z shaft. again, this is rectifiable... (read c.mercers review fixed my problem) with modifications... SO, even though this IS a cheap solution, and IS useable if youre capable... based on solely the quality of manufacture of this product... though its not a direct fit, plug and play part for the described machine its sold as... which equals 1 star, and not reccommended if youre looking for the quick fix this is supposed to be.

I ordered two of these for an Ender 3 V2 rebuild. Very much two different sizes. I got the smaller one to work by enlarging screw holes and it functions but its clearly the wrong size. The larger one was perfect. If youre ordering these, you probably assume you have some z wobble due to the lead screws. These will help tremendously and watching how much they deviate gives you an idea of how bad the issue was.

Great item would buy again A+++