Optimized Plastic Bearing for Creality 3D Printer Review

I managed to get enough wheels from this set to do what I wanted, but you can grab the center bearings and wiggle the plastic roller back and forth a bit. I don't think the spacers between the pulleys are as wide as the shoulder in the pulley and this mismatch allows for some play. It's excellent value for money, but test the ones you intend to use before screwing them in.

I saw terrible reviews before buying and was very concerned about the purchase. Looking around, the only thing was that the other options were way more expensive than this one. So I played it safe and bought more than I needed. I bought 20 of these and only had 5 of them unusable. The rest was in perfect order, with good rolling and no play from side to side. The 5 unusable parts had either lateral play or a rough/crunching rocking motion. Just buy more than you need and do the quality control…

I have bought these wheels 4 times. Of the 40 bikes I bought, 9 were good, meaning less than 10% are actually usable. I have a homemade wheel tester to confirm their quality, but there is a visible difference between good/genuine wheels and wobbly/poor wheels. I've added a photo to show the difference. Left wheel is good, right wheel is bad. You can see lighter/more reflective metal inside the bearing as well as a warmer black color and matte texture on a good wheel. The result of wobbly/poor…