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)

To use this, the holes did not match existing part that you must use. The machining was not complete, no holes in the middle section. Waiting for replacement. Not sure if this will do anything or not to help.

gracias

Pulled the z axis rods off and installed these. No problems with fitment. Not sure if a gimmick or a useful product, time will tell but quality seems good and install was a breeze.

Recommend to help solve backlash issues on your 3D printer

The mounting holes on these anti-backlash buts are drilled slightly too far out from the stock mounting holes, so they dont fit on the brackets. Completely unusable without hogging the bracket holes out!

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

These are exactly what they claim to be. Not much else to say.

Used this kit to upgrade the stability of the Z-axis on my Creality CR10S-Pro V2. Gantry kept sagging to one side when the power turned off. Installed these puppies and *poof* - no more tilt! I can press gently down on the frame and it stays put. The nice thing about these is that you dont have to cut the brass fittings to fit onto the frame- just remove the screws, compress each unit and install. Better have two sets of tweezers to hold the small parts when reinstalling, though. Also, if it doesnt screw onto the axis the first few times, no worries- its a precision part. Here are the steps I followed. 1. Gently unscrew the threaded rod from the frame. Remove the current brass fittings, set the screws aside in a safe place. A towel or small bowl is fine. 2. Rotate the brass collar slowly and as straight as possible until it screws on enough to stay put. Do not screw it on all the way. 3. Compress the rest of the fitting onto the part before continuing the rotation. The teeth should be locked into each other. 4. Secure the brass fitting to the frame of your machine using your screws, but flush the nuts with the underside of your frame before you finish securing your screws. 5. Make sure the top of your rod is flush with the top of the frame before you secure the collars to the motor. This will prevent the threads on your axis from being misaligned. Hope this helps!

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.

Easy to upgrade from standard.