[13pcs of Pack] Openbuilds CNC Clear Polycarbonate Wheel POM Pulley with 625ZZ Bearing for NC Engravers, Hot Wire Machines, Laser Cutters,Camera Sliders,Plasma Cutters, Robotics

These wheels are a huge upgrade in precision over pom wheels. It doesn't require a lot of tension on the to get the carriages snug with no play. The wheels are cut very accurately and seat fully in the extrusion V slot. All axis are super ridgid in comparison to the stock wheels, especially the Y Axis. For those who are worried about wear on aluminum extrusions, I don't think there is a problem. The spec sheet on their website states a Rockwell of 30-43 for the steel wheels. 6063 Aluminum extrusion is Rockwell 53. Unless you really crank them down I don't think wear is an issue, and since the steel wheels are softer than the aluminum, it's likely that the wheels will wear first. The only drawback is the weight. However the increase in rigidity and ease of install is totally worth it. Great product.

Seems to be a harder material than stock

I ended up going to linear rails after these. They did help me determine that my extusion bars had some imperfections on the extrusion bar. I wouldn't have noticed with the stock POM wheels, as they are softer and just took all of the wear quickly, whereas these are much more durable, so if your machine is not perfectly square, I guarantee that it will make some noise from the wheels. It was a blessing in disguise because I went to linear rails after with better results

Purchased to have spares on hand for machines. Great buy for the money.

I was excited to add these to my machines as Ive heard these are high quality wheels. Upon receiving my pack of 26, I noticed these weird lines in the wheels, I didnt think much of it, but when I cleaned them with alcohol they broke apart. Maybe half of the 26 in the pack have those lines and it makes me nervous to install them. I will use the ones without the lines and hope they are fine, but not something I was to figure out another 10 times the hard way.*update, installed a few wheels, when the printers homed, the wheels broke apart. Absolutely garbage. Will not purchase again.

I had tried upgrading the POM wheels to the SIMAX3D clear versions, but they still left dust in the rail slots within a day of use. I have since upgraded to these and they are perfect! The precision can easily be seen when trying to reset the Z offset value, and in the quality of prints compared to the original.For those with an E5+, replace the inside Y axis wheels on one side first, then the outside wheels on the same side. Repeat on the other side. For the X axis, remove all three wheels, then replace the bottom one first followed by the top ones. It's easier to keep everything aligned properly that way. If after replacing both sides the X axis rail wiggles up and down, one of the Y axis wheels is not sitting square with the rail, most likely one of the inside wheels with the hex-shaped spacer.

Ooznest I believe said these wheels were a match to their wheels but the older wheels. I’m probably wrong though. Wheels look good they just don’t match my other metal wheels even though the measurements were the same on both product pages. These wheels did not fit on my open rail as good as ooznest wheels from Europe. Don’t use these for a 3d printer unless it is open rail. It will wear the paint off and the metal if you give it enough time. Even on open rail. Open rail is easy and cheap to replace. If these are actually stainless steel wheels they are harder than the aluminum rails. Ooznest wheels are beveled on the outer rim and have a tight fit on this ooznest open rail.

i dont add photos sorry. but these went on extremely easily on my anycubic chiron. i planned to use them just for the bed but ended uo getting tweo bags and upgrading all axis. i have a few left over ill use for another project but these are really nice. i felt it may be better more accurate setup on my chiron and so far it is! its a nice upgrade but not as expensive as linear rails.