UniTak3D Ender 3 V2 Y-axis Belt Tensioner Upgrade for Creality Ender 3 V2 Ender 3 Pro CR10 Mega Zero 2.0 Flashforge-Aquila AURORA-A5X 3D Printer 2040 Profile

I had a belt starting to sag a bit so I decided to pick one of these up and its went right one easy and has made keeping the belts tight SOOO much easier.

i wanted a much more solid x-axis belt tensioner. this is super solid. the only issue is that the included machine screws were a little too long for the 2020 extrusion.

This really helps keep the x axis belt tight. Has really improved my print quality.

I installed this on a Longer LK1 (Alfawise U20) and is does exactly what I wanted it to. This part is well designed and manufactured with precision. Surfaces are smooth and square with no burrs and the bearing is quality. It also ships with quality fasteners/hardware.... not the cheap, mass produced stuff that usually comes with attachment pieces and easily strips or elongates. Purchase with confidence - you wont be disappointed.

Works very well. Easy to install and super durable. Should be the gold standard for 3d printers to have pre-installed.

Installed this on my Ender 3 Pro to allow easier belt adjustment. Took 2 minutes to install and works like a charm!

Crashed into the bed while its running through the ABL process ONLY when its running through the center row. All others seem to not have an issue.

Works great!!!! I had one I printed and it worked but this is so much more fitting for the printer style....strong and slim!!! I love this x axis belt tightener!!! Went on easier than the printed one and is super solid Perfect upgrade for an ender 3

The description says it fits the Neptune 2. This absolutely will not fit the Elegoo Neptune 2. It does not even come close to fitting the rails. If you are buying this for the Elegoo Neptune 2 don’t, it won’t fit.

If the carriage inside width was just smidge wider the problem I experienced could be avoided, and this thing could be hacked to use the original bearings in the Creality tensioner mechanism. For me, the pulley itself is rubbing on the tension carriage adding dragging and screeching. If the part were better designed, they could give some relief to hold the center of the bearing in place yet leave clearance for the pulley. Or the whole center part of the carriage could be made wider and some thing washers inserted to create the clearance. And this should really be using a shoulder bolt instead of a fully threaded M5 part so the bearings are riding on a shaft instead of undersized thread.