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

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.

It works acceptable, but the lubrication used was gummy and sticky. The packaging was just a plastic tube that doesnt really seal which wouldnt be a problem if they used better lubricant. I havent used them for any demanding tasks, but they work for random projects

The dimensions are WAY off. Pressing these in was more like dropping a toothpick into a volcano. Luckily i dont need a press fit for my application, so it didnt matter. You really get what you pay for here. Also the race was PACKED with FOD. So much aluminum or steel glitter is packed in with the bearings, it feels like sand when you move the bearing around. Only two out of the pack where smooth. This is real bottom of the barrel stuff, but its also literally the cheapest i could find. Im pretty sure the oil that was covering them was some kind of caustic nonsense and it made my skin red where it touched me.

They work as designed and were cheap, used in a 3d printed project.

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.

They seem loose and wobbly and many of the shields protecting the bearings from dirt are dinged up like they were installed by hand by someone in a hurry. A bearing should only spin and not move in other directions. I plan to use them for wheels on parts bins, so theyll work for that, but I wouldnt bother with them again.

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.

Two out of 20 are very rough and poorly made. Quality control is questionable. All bearings needed break-in to spin. About 5 spin well, rest are just mediocre.

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