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

Im using these for 3D printing in the creation of Filament Spool holders. These are perfect with just the right amount of friction so that they roll nicely. I did not clean the bearings but used as is.

Currently using one as part of a 3D printed stabilizer for my Z-axis on my Ender 3. Its the perfect fit allows rotation and little wobble. Printing has been going a bit faster and cleaner.

Filled with some of the cheapest thickest grease they could get. Takes a ton of effort to get these spinning smooth. Cleaned out the grease with brake cleaner, and used an oil meant for ball bearings and they spin much better now, but nowhere near high quality bearings.

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.

Purchased a set of these bearings for 3D print related projects that require 608 bearings. All of my applications would never put real stresses on these bearings as a skate would, so I cannot review this as its official intended purpose. For my purpose, I have zero issues. So far, I have printed out a filament spool holder and a filament guide. The bearings are smooth. With the set I received, do not have any issues with them being too stiff or too slick as far as ease to roll.

These are labeled as 608ZZ and are double metal shielded. The ability to spin freely is somewhat limited for some reason. I dont know if the grease inside is too thick or what, but if youre looking for a bearing for a fidget spinner then you might want to look elsewhere. On the other hand, there is no play between the inner race and the balls and outer race, so I cant say they are sloppy loose either. I think they are a god value for the cost as long as you are not wanting something that is going to spin freely for any length of time.

I needed ball bearings that ran smoothly for my application. These bearings are packed with grease and didnt roll smooth enough for my project. However, I think theyll be ok for other applications.

very good for my job

Clean these bearing out with acetone or similar solvent and they will work pretty good. My uses are under low Load, toys or low rpm applications so I can not comment on high load applications. The 5 star rating is my rating of these performance vs the price. If you are expecting high precision bearing you will need to spend more per bearing.