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

I love these for 3d prints! They dont spin forever like a fidget spinner would, but then again they shouldnt. The grease is viscous enough to prevent free/loose movement on the filament holder that I printed. If these spun easily and for a long time, I would have tangled filament! I suppose the grease could be replaced if you need a longer spinning bearing, but you might be better off getting another product.

They come coated in thick greasy shmoo and dont spin well at all. but a few liberal sprays of WD-40, spinning it a few times in-between sprays, and they spin real nice. about 4 out of 5 spin well so far, some have what feels like metal bits in them that prevents super smooth spin. i havent taken the lid off of them, just sprayed the sides, and the WD-40 works its way inside. for 10$ getting 20 of these, even if only half worked, i would have been happy. im using these for robotics, not skateboards. packaging is a little lacking, but ive seen worse

good price, bad quality,

I don’t know much about bearings but from what I’ve gathered, these are commonly used with 3D printed parts for printer upgrades. I figured I’d buy a set for filament storage and a filament guide. So far, these are doing just fine. I followed the advice of other reviewers and used a liberal amount of WD40 to get these in working order. I soaked a shop towel and put these in a ziplock bag overnight and the gunk previously seized these bearings is now gone.

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.

I keep a stockpile of these on hand for my 3D printing projects; a lot of them require these bearings. I bought two tubes of 10, and took them all out. One in each tube was Crunchy, bound up and unusable. The rest seemed perfectly fine though. They still seem to have a thin film of oil from manufacturing, which protects from rust. Previous bearings from a different company didnt have the oil, and rusted up quickly in storage. Theres a bit of friction when spinning, but that might just be the grease used inside. I imagine you could soak them in oil or some kind of solvent to remove the grease and get them spinning freely. For the price, I wouldnt trust them for anything super heavy duty or something that human life depends on, but for small projects these are great.

No tienen la medida correcta

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

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.