100 PCS 608-ZZ Ball Bearing - Double Metal Sealed Shielded Miniature Deep Groove Bearings for Furniture Wheel, Skateboards, Inline Skates, Scooters, Roller Blade Skates (8mm x 22mm x 7mm)

Excelente

Works great

The media could not be loaded. I had gotten 100 of these for about $18 USD or $0.18 each. This is extremely cheap for a bearing and if you get even a okay bearing for that price it is hard to complain.However in honesty the bearings I have used so far out of this are what I consider good. Not amazing or exceptional... But definitely good...The product boxes (NOT the boxes they are shipped in) for the bearings have no markings at all on the manufacturer and mine are of poor quality falling apart just from moving around the bearings so they are no good for storing the bearings in long term.The bearings come in sets of 10 in a tube in two boxes of 50. The Tubes are flimsy but convenient for long term storage and protection.The bearings themselves are sticky, so much so they are stuck together a bit when first pulled out. That seems to be mainly a surface thing though as most rotate smoothly. (Some do need a bit of breaking in though.)It could be a thick grease from the lubrication or something put on the surface to protect from corrosion.These bearings are 608ZZ bearings meaning they have 8mm bearings inside an a piece of metal to protect them on both sides.An important thing is there is a quality discrepancy across the 100 bearings you get. Some turn much easier than others, and some are quite stiff right from the beginning.I have not had any straight Bad Bearings yet though, just some that are just okay. Which can still be used for some things. (Like not great for a skateboards but fine for a drawer roller.)You'll likely want to sort through these bearings (grade them) and pick and choose which ones you want for your specific applications.What I found though is that even the best of these bearing are still kinda stiff compared to really good bearings (Like couple buck each bearings.) But again at such a cheap price it is really hard to complain.I have been using some these bearings over 6 months on my 3d printer for a filiment spool roller and it works amazingly. They spin smooth and without issue. (No more the spool jumps and shifting noise...)I also am using two more on a filiment feeder to the printer which too has been working great.All which I show in my pictures.Additionally I just used two for a VAWT or Vertical Axis Wind Turbine. It is just for some small scale testing right now but as I show in my video. The bearings work great for that too.I do personally suspect if these bearings were cleaned of the sticky grease or oil on then and relubbed with better quality stuff they will work better. But being ZZ (Covered) Bearings that is a bit more work then normal.I have not tested yet but may in the future.On a last note I am fairly confident these are reject bearings from a factory as I see a lot of small imperfections on them. Like Dents on their shields, the center bearing column being slightly different size (Lengths) or a little more play then normal.That is likely the cheap price and quality mix. But as I said it before, the price makes it worthwhile to get for light duty stuff.Also if you were looking to make a turbine or wind ornament like I have, the perfect size rod that fits in the bearing hole is 5/16.Hope this was useful.

I have purchased thousands of these bearings. THOUSANDS. For the money, they are hard to best. If you order some, do take care to order double what you need. Some batches? All of them run smooth as butter. Most batches? You will have a few with grit or crushed bearing covers and will be totally immovable. Don't let that deter you. Just buy more. Ive used these for everything from caster bearings to diy gantry builds to home made toys. Solid 5 stars!

A good product. The bearings are packaged reasonably good. It is slightly stiff with grease but that is expected. Smooth bearings at reasonable cost and will order again and recommend to others. Ordered along with various size bearings all are great. My package came from China but no issues. Delivered promptly. No complaints.

The stock grease/oil is definitely a little stiff with these for transport. I wanted these for a simple project where losses didn't matter and these work great. If I were to want low resistance I would clean them out and put lighter weight oil in, but they seem good quality and fantastic bang for the buck. Would definitely purchase again.

I expected lower quality bearings when buying these and that’s what I got. I’ve used a handful and so far one was missing a side shield, there was some random crud inside one of the tubes of bearings, and they don’t spin all that great.But they do spin and they worked just fine when used as part of plastic filament roller.

After 24+ hours completely submerged in 99% Isopropyl alcohol and some fairly regular agitating, these things still stuck together like glue. I had to pry apart several of the bearings before laying them out to dry.When they were dry, I doused each and every one of them with a heavy dose of 3 in 1 oil and that seemed to cut down on the stickiness of them and allow for the bearing to be rotated by hand (but NOT Spin). I then flipped them all over and gave them another dose of 3 in 1 oil and let them sit for a couple of hours.These finally did loosen up enough that I could actually use them in the fidget spinners I make, but their performance was way less than desirable. These are NOT worth the time and trouble, they are cheap garbage. Do yourself a favor and spend a little extra on some quality bearings that will perform much better!