T8 Lead Screw Anti-Backlash Nut

I said the specific printer I was buying the nut for in the comments of my order and I did not choose the right one. The guys were nice enough to change my order to the correct nut before shipping it to me ! Thank you so much !

The lead screws are straight and work well. But the anti back lash nuts are a 50/50 one works well and the other does not. The holes are also not threaded for attaching to the z gantry. I would look some where els for back lash nuts.

These nuts are poorly machined and need a lot of working in before you can even spin them by hand. Even with a healthy coating of grease they are quite stiff until you've run them up and down the lead screw quite a few times, and there were multiple burrs that needed to be removed by hand. The fastener holes are also not aligned with the shaft, so tightening them fully puts the nut at an angle and will bind the lead screw.

They need to be "primed" to slide properly, but they work great after that. I put the screw in a drill and get the assemblie to move on high speed couple of time before installation.