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

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

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.

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

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.

I had several damaged bearings that could hardly turn and one where the shielding came off completely. Minor issues are the outer diameter is small by about 0.5mm and they wobble quite a bit. I use these for little 3D printer project but I doubt I would ever put these on a skateboard.

I bought these bearings for the fan motor in my bathroom. I used a proper two-jaw puller to pull off the old bearings and to my surprise these new bearings just dropped right onto the shaft, even though I had to use a puller to pull them off. Once installed, they were pretty rough to turn over, which is fine because I expect the grease to have to melt and turn into oil to lubricate the balls themselves. Once installed, the motor was kind of hard starting, and once it was going it was extremely loud. Much more loud than the old bearings that were in there. I would not recommend these for use in a motor of any type, unless noise is not a factor.

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.

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 wish I had read more of the reviews. These are packed in such heavy grease that they are practically impossible to use out-of-the-box. They do not spin freely. Some reviewers have said this is actually preferable for industrial use. That may be. The product name says Skateboard Bearings and they are unusable for that purpose. Others say to take degreaser to these bearings and re-lubricate them. Again, that might be fine for some folks, but I bought a product, not a project. These are going straight in the trash and Ill buy free-spinning bearings from a local skate shop.