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

Like others mentioned, these come packed in grease and nicely stacked in tubes. Once you spray a dab of WD40 on them they spin very freely and the dimensions are accurate from what I can see. I did receive one that was slightly damaged but the rest were all good. I would buy these again.

I read a lot of reviews stating they dont spin very well. This is 100% true. When you get them, they are gummy. A spray of WD40 and working them a bit will have them spinning nicely in no time. I dont use them for whatever they were manufactured for, so I cant say if they are good for whatever that is, but for hobby projects or 3D printed stuff, they work swimmingly.

I was worried at first because the didnt want to spin, but once I put them on my board, they (for lack of a better word) loosened, it was smooth cruising. Great product..

Delivery is quick, as expected from Amazon. When I opened the bearings there was a rancid smell that came from the bearings. That indicates that the grease has run pass it life. When I try to spin the bearing it was not smooth. When I touch the bearing, there was a sticky feel to it. I may have gotten the old bearing instead of their newer ones.

I got the bearing to use for the 3d print parts, but out of the box the bearing does not rotate too well. You may need some clean up and re lubricant depends on the use. Overall its OK for basic use.

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

Poor quality control. One of the bearings was kind enough to be missing a side shield so I could see the guts of the thing. The side wasnt in the tube, it must be somewhere at the factory. You can see the bearing to the lower right of that one is either made incorrectly or possibly inserted backwards? idk. Luckily they should work for my application since its pretty light duty.

Used to replace bearings in a rollator walker.

one of the bearings came with a big gash in the shield, and all of them are really just not smooth. gritty and hard to turn.. going to try to repack but spend the extra 10 bucks and get some quality bearings.

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.