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

You’re probably looking at these because they have a good price point, which they do. And that really low price point is the only reason they’re not even more lowly rated. The bearings come heavily coated with grease - enough that it actually hinders rotation. It seems like this is done because it also hides imperfections in the bearings. After clearing the bearings they rotate much more freely, but have a definite wobble to some of them. I compare them to a 20 year old set of real ABEC 7 bearings in my rollerblades and these are definitely not ABEC 7. So, if you’re looking for some bearings for a robotics project where they’re on an idler pulley, these are fine. But if you think you’re gonna drop these into a board or skates, keep looking.

The ball bearings did do what they were supposed to, but didn’t do it well. The bearings were heavily greased to the point of no free spin. With a nice isopropyl bath they end up working for what I needed them for.

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

They roll. Several of them have dents in the steel seals, but honestly, as long as they turn smoothly, I dont care.

Seems to be solid standard 608 bearings, though they are packaged with heavy grease an do NOT spin freely. You have to take time an resources to properly clean them out with a solvent before RE-greasing or oiling them. Out of the box, they are stiff to roll an notchy. Once I put them in a sonic bath an regreased them, they were fine. Much like standard mid-quality sk8 bearings. For the price, sure, theyre fine enough for skating, but for 3D print applications, they are not plug n play, you need to coddle them, therefore, I took a star or two off the score. Better off going to your nearest skate shop for ready to ride bearings.

Pretty stiff and sticky out of the tube. A little wd-40 to clean them you and loosen them and they work just fine.

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

Im not sure if its the batch I got and the heat melted the plastic (doubtful being in Northeast), but these are okay. It was very sticky and barely spun, but after letting them soak in a couple sprays of T-9, they were spinning... but not spinning the way Id expect bearings to, but the minimum amount. I purchased these for my Powermatic PWBS-14 Bandsaw, and they fit and match for a fraction of the cost from buying them directly from Powermatic. If purchasing again, Id try another company.

Bought these for a custom fidget spinner. With the original grease, it spun around twice. Two rotations. I removed the dust covers and grease and they worked much better (though obviously dont do that on a skateboard)

Pros: - Cheap - Comes with shipping oil to keep out any grit/grime Cons: - The QC is awful I purchased two packs of these to use for a project and found that 10 of the 40 bearings had issues. Many were minor such as small dents/dings in the shields, but there were a few where the entire inner or outer bearing piece has been chewed to bits. If youre going to buy these, make sure you buy extras since about a quarter of them might be faulty. Since this was fulfilled by Amazon, Im unable to contact the seller for replacements and dont want to return the rest. Still three stars though, you get what you pay for.