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

This is a very high quality bearing. As others have stated, its got a good thick lubrication applied. Out of the box, they are perfect for heavy loads. For most tinkering and crafting where you want as little friction/resistance as possible, youd probably want to heat these a little and get rid of that lube to install a lighter weight lubrication. Other bearings might spin better out of the box, but the quality will probably be lower. Id recommend these bearings.

Thse seem well made. The dimensions are quite accurate. I found absolutely no rust. They spin amazingly well for the price. Out of 40, Ive had two that grated a bit, but none that didnt spin at all. As other reviewers mentioned, they come packed in heavy grease (probably to avoid corrosion), and you need to soak them in PB Blaster, WD-40, or some other light penetraiting oil. Im using these for 3D printer spool holders.

Product is as described

They work and they are working well. That, along with a great price makes it a great buy.

I used these bearings for some 3d printed projects and they work and fit perfectly

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.

Had to clean with WD-40 but after that they all spun freely no problem

They work. Theyre decent quality but from what I could tell, not for high precision applications. The center bore wasnt always exactly centered and several spun rough but did work and will be sufficient for my needs. Id guess these were pulled from old equipment as many of the ones I received showed signs of previous external wear. I also had to clean these up as they were sticky to the touch, smelled awful and were initially very difficult to spin.I soaked half in Mineral Spirits and the other half in Acetone. Both methods seemed to clean these up really well and they all spun freely after cleaning. Ill likely repack with better grease when Im ready to use these. For my project, im more interested in lowest possible resistance and not concerned with speed or

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.

Theyre basic sealed bearings from China that youre not supposed to open. They dont run fully smooth out of the container. If you work the bearing for a while, it does improve. But without disassembling and cleaning, it wont spin like a fidget spinner. Im using it for a roller on my Ender 3 printer, and for that its been fine. So just decide how smooth you need it to be. 3 of 5 stars overall.