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

Like other reviewers have said, they come packed with some thick grease which is probably fine for skateboarding. If you intend on using them for applications requiring them to freely spin, just soak them in a solvent for a little while, then wd-40. This worked great for me, your mileage may vary.

These are an exact fit bearing for the FL Sun cube 3D printer I had. Unfortunately the quality, although better than the originals, still included ones with defects. I replaced the four bearings and found that three of the four had bad spots in them. I sorted through the first package of ten and found that 4 were bad, with a spot that clicked when the shaft was turned. Of the six remaining, I chose the best four and they are currently working fine. Note. These are NOT sealed bearings and do leak lubricant. However, because of this, they can be flushed and re-lubticated. I do not recommend them for Inline skates or any machinery that is precision, critical, or may be exposed to contamination such as dust and dirt. They are low cost and low quality. OK for the price, but thats all.

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.

I used these bearing to repair some Adult Assistance Walkers, for the elderly people that reside at the Adult Foster Care/Assisted Living facility, where my wife works at. They were going to throw them out, because the wheels were wobbly. She figured that I could probably fix them & save them from going into the dumpster. These fit & worked perfectly! I was happy & pleased with the quality of the bearings, especially for the price. Be sure to check the size bearing that you are going to need for your application or repair. As they do come in very many different sizes. I must add...Shipping was Super Crazy Quick for these too! I was able to repair 3 walkers with this bearing package/kit. I made the Senior Citizens at the facility very Happy! Being able to use Safe, Smooth Rolling Walkers again. I was a Hero in my wifes eyes...even for one day...so, Ill take it!

Ive used these for around a year in a few applications and overall if youre looking for something low speed with radial only (no axial) load then these will probably be fine. Anything high speed (greater than around 200 rpm) will quickly destroy the bearings and anything with any axial load will quickly destroy the internal balls. I used these in a cnc router as guide for lead screws and the axial load destroyed them in less than 20 total hours of use.

I used this product for a wind spinner and it works better than ever. I also have several spares if needed. It saved my wind spinner from being trashed and I was so happy!

Used to replace bearings in a rollator walker.

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.

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)

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.