608 ZZ Skateboard Bearings, Double Shielded,8x22x7 Miniature Ball Bearings（Pack of 20)

Works fine for 3D printers. I removed the grease with spirits to run smoother

Perfect for my 3D modeling projects. Good value for the money; Spinability is good.

They arrived in good shape and spun freely right out of the box. They fit perfectly and roll smoothly. Great value for bulk replacements or DIY projects.

I keep a stockpile of these on hand for my 3D printing projects; a lot of them require these bearings.I bought two tubes of 10, and took them all out. One in each tube was "Crunchy", bound up and unusable. The rest seemed perfectly fine though. They still seem to have a thin film of oil from manufacturing, which protects from rust. Previous bearings from a different company didn't have the oil, and rusted up quickly in storage.There's a bit of friction when spinning, but that might just be the grease used inside. I imagine you could soak them in oil or some kind of solvent to remove the grease and get them spinning freely.For the price, I wouldn't trust them for anything super heavy duty or something that human life depends on, but for small projects these are great.

They work fine. A little tight but not much.

Got these since I wanted to 3D print some things that required 608 bearings. Gave these a go and they didn’t disappoint! For the price, they are high quality and perfect for my low speed, low impact application. Time will tell as far as the seal quality on them. They are very smooth to spin with minimal resistance, and make zero noise of grinding. Definitely recommend if you need these for 3D prints!

I can't express how utterly disappointed I am with these 608ZZ bearings. From the moment I opened the package, it was clear that these are some of the worst bearings I've ever encountered.First off, the inner diameter (ID) is completely out of spec! I measured it at 8.05mm, which is absolutely unacceptable. Bearings should have a slight press fit, but these are so loose that they practically rattle on the shaft. If you’re looking for precision, these bearings will let you down.Second, the lack of grease is appalling. When I opened these, I expected to see a decent amount of lubrication, but instead, there was barely a trace! It seems like the manufacturer skimped on one of the most essential aspects of a bearing. Without proper lubrication, these bearings are doomed to fail prematurely.Lastly, the play between the inner and outer race is atrocious. There is a significant amount of wobble and play, which is unacceptable for any application. These bearings feel cheap and poorly made, and they definitely don’t inspire confidence in their performance or longevity.In short, these 608ZZ bearings are a complete disaster. If you value quality and precision, stay far, far away from these. They’re not worth a single penny and will only lead to frustration and wasted time. Save yourself the hassle and invest in a proper, well-made bearing instead.Rating: 0/5 (If I could give zero stars, I would.)

They work okay, seal is good, well greased, small amount of friction keeps them from being faster, fits well into my 3d print that called for them, and they are smooth enough.