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

Used with 3d printing projects. Sizing seems accurate, and rotating action seems smooth with low friction. Looking forward to finding more uses and buying again, cause its FUN making stuff

These might be good for heavy projects but they dont turn very easily and they came really sticky all over like some cheap greese, idk. Im going to return these and go with a little more expensive set.

As others have mentioned, out-of-the box these bearings do not spin well at all. Theyre covered in a viscous oil thats most likely there to protect against rust. Just run some 3-in-One Multipurpose Oil through them a few times; this will both clear out the thick oil and lubricate the bearings as well. They seem to be just as high quality bearings as most others.

Used to replace bearings in a rollator walker.

Purchased these for use with my 3D printer, filament spool attachments. These worked great. Nicely sealed, lightly oiled and in a nice reusable container.

The bearings are coated with some type of tacky oil (I assume to protect them). The rollers do not turn smoothly and have a lot of resistance. I tried soaking them in Acetone (twice) but had limited success. It did not appear to dissolve all the oil inside the bearing. I tried Xylene and that worked better. I still have 6 bearings with high friction. I will try another soak with Xylene.. If successful I will then lubricate with white oil.

Some bearings roll smoother than others. Most of them are pretty stiff but you can oil them for some decrease in friction. The plus is the diametric tolerances are pretty good according to my calipers. OD 22 +.04 -.04, ID 8 +.03 -.05 which is great and they work great for my low speed purposes

Its 608 bearings in a pack of 20, its pretty much exactly what it says. Came in 2 of those plastic tubes that are barely better than just shrink wrapping them but thats fine, thats all I needed :)

Like other reviewers have said, they come packed with some thick grease which is probably fine for skateboarding. If you intend on using them for applications requiring them to freely spin, just soak them in a solvent for a little while, then wd-40. This worked great for me, your mileage may vary.

I did not use these in a skating application. I can not speak to their durability in that application. There were used in a spooler that required a set of 608 bearings that could simply roll smoothly at low speeds. All dimensions were within stated specs for 608 bearings. They come pre-greased in tubes of 10. No complaints and would order more for additional projects.