Befenybay 6PCS Diameter 8mm Black TR8x2 Lead Screw Nut for CNC and 3D Printer Parts (Size: Tr8x2)

These make a good update to help eliminate the need for lubricant and eliminate noise. They are a little sloppy - a lot like the brass ones. I think a little higher precision would be ok.

Got these for my new ender 5 plus. Fit great and took away the screech it had developed when lowering z axis.

I used these to replace the worn brass lead screw nuts on my Anycubic Mega X. They are perfect fits, and a little quieter than the originals. I do recommend that you put some lube on the lead screws to minimize wear, but that would be for nay lead screw nuts.

The threads on this fit the Prusa MINI+ and my first few prints have been successful. Although the threads fit, the fastener holes and diameter are not the same size as the MINI+s original nut. I had to modify the holes on this screw nut in order to fit the MINI+ (I cut it to make two of the holes into slots). So far it works!

Worked!

I decided not to wait for the brass ones to wear out. sure they are self-lubricating, as they wear out, but their wear provokes the increasing possibility of backlash on a gravity-engaged moving part. These POM pieces are the worlds slipperiest plastic with the best wear rate. They are a tight fit, compared to even new brass lead screw nuts, but that tightness is not binding. reassuring is the word I would use. From what I have read, the wear properties are much superior to the brass. I retain the brass as they have not been used to the point of being worn out. The Z gantry of my 3D printer feels more substantially connected and any crew-induced motion artifacts no longer exist. Just smooth layer lines, buttery smooth and consistent. This will be a first order upgrade for any and all of my new FDM printers from now on.

Tight fit, no slop, perfect for my needs

Quieter than brass and zero lash. Yeah they wear eventually but there are six of them in the package.

Very solid and tight threads. Barely any play along the t8 rod. No lubrication needed and very quiet in operation. I have known delrin to be a very strong polymer - not easy at all to wear and cut but using this material makes the most sense to make contact with metal.

My ender 5 plus was driving me insane till I used these. Its so much better now, no more squeaks!