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)

As described fast friendly service.

Quality was ok but caused z-axis binding. Nice idea, but the experiment does not work.

Holes spaced further apart than normal by about 0.5mm so won’t mount to frame.

Fit well on my ender printer. Good product so far

One of these didnt even fit so seems like size isnt very accurate for these things

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.

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.

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.