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)

the backlash nuts are larger than the Oldham couplers off the same listing. The holes do not match up with the coupler or the printer. otherwise seem to be well made

This was a well made and finished product, but the screw holes are 19mm apart and will not fit an Ender 3/Voxelab Aquila printer that require 18mm separation. The lead screw nut has less intrinsic slop than the OEM nut, and with the backlash set, has zero slop/backlash.

The set comes with two units. On both of them, the threads were too tight. I should have known when I threaded them on (it took too much force to get the Z rods started). Because theyre so tight, it caused a ton of binding. Put my originals back on and I was back to buttery smooth. I really just wanted to try these for fun - turned into an annoying afternoon project. I do not recommend.

Unable to install due to different hole spacing on the backlash spring. Also realized that it would not do anything. Its basically a type of cvd to eliminate screw wobble from affecting the gantry but it is only threaded on one side so the bolt has to go all the way through the coupler into the lead screw nut making them one solid unit. It needs threads on both sides so that it can be mounted to the screw and the gantry with short machine screws.

Initially fits more tightly than the nut its replacing (cause it hasnt been worn-in with use). Be sure to compress the spring fully when inserting. The little dog ears make a slight tick noise that wasnt there before, but only on z-travel. Lubed with some 3-in-1 but will wipe clean and redo when the superlube gets here. Ender 3 pro, used both while performing a dual-Z pully upgrade.

Easy to upgrade from standard.

Waste of money. The mounting holes are 1-2mm too far apart and do not line up with the stock lead screw bracket nor do they fit my aftermarket dual lead screw bracket. Look at my 2nd picture and you can visibly see the difference in hole spacing. Buy something else.

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

I bought the oldham couplers and they didnt match with the original parts.

I own a Creality Ender 3 v2 and put these on as an upgrade. It makes a big difference. Just know that the top piece with the notch in it, the notch faces down to the bottom, there is a great video on All3dp.com, but they tell you to put this piece on opposite of what i said because they are using a different mfg. But the rest is the same.