100 Pack 608-2RS Skateboard Bearing, Rolling Bearings, 8x22x7mm 608rs Bearing

Cheap and cheerful. The rubber seals make removing the grease easier. Price is right for simple 3D printer projects.

Had five different 608 bearing types delivered to test for a device I’m building. I’m throwing these away, all 100 of them. These feel like they have sand for a lubricant, and that’s just testing with my finger tips holding and turning the bearing. Under load these will fail quickly. If you need a bearing that will only last 24 hours, this is for you.

Product sudgestions from Amazon

These bearings arent a bad deal if you know some things going in. I am using these for a filament drybox for keeping 3D printer filament dry. Out of the box, these have a sticky machine oil/grease on them (probably to prevent rust) and do not free spin very well. If you open the seal with a knife and blast them with white lithium aerosol, they spin very easily. It doesnt look like they are packed with any kind of lubricant inside the bearings.

Ive owned many bearings over the years, for many purposes. I didnt leave a review sooner ( I ordered these OVER TWO YEARS AGO) because I figured with the absolute abysmal quality, there was no way the listing/store was still even up. You know those things you order, but by the time you go to review the entire seller has disappeared, seemingly overnight? I expected that of these. Out of a set of twenty of them, I found eight which dont exhibit axial tilt while rotating, like the earths axis is tilted and wobbles. Their axial play is easily perceptible, their axial precision (angular wobble off axis) is ABYSMAL (Id say 2.5 degrees on average?) and they make SO. MUCH. NOISE. IF you need a billion bearings with absolutely no requirement for precision or reliability, buy twice as many of these bearings as you think youre going to need. If you need any manner of stability, quietness, precision, reliability, longevity, or any other positive attribute beyond nonzero weight and doesnt crush easily from the side Id suggest you look ANYWHERE else. Ive been angry every single time Ive had to try to find a usable one for a project, for literally two years. NOTE: Im not joking, I can print bearings which run more smoothly and silently than these, out of PLA, AND they track straighter. No, theyre not nearly as strong, and will crush readily, but these are worse for most of my applications than PLA printed bearings.

Did not fit as expected, fits sloppily on the axle what about a half a millimeter of Clarence although this may have been partially my fault but

The price is really the only reason they earned 4 stars. The quality and function varied wildly within the batch; some of the stamped steel bearing cages were deformed to the point of being almost completely locked up. However, they werent too greasy or messy and all of them were dimensionally correct. They came with a heavier grease in the bearings, more fit for doing work than hitting maximum RPM. I needed about 60 of these for my project and had to trouble coming up with that many acceptable pieces out of the hundred, so Im satisfied.

WayneChicago wrote an excellent review. You should read that before reading mine. He outlines is perfect detail all the reasons why people buying these are complaining. Only he says it with tact and finesse. But I dont have that. So if you want a more direct rebuttal to the absolute nonsense youll read in the product review section about these being akin to sand-filled garbage, then keep reading. However, If sciency words are just flowery nerdspeak to you and breaks your brain, then just sop reading now and go buy the grossly overpriced BONES bearings. They make the cool whizzing sound on first rip out of the box. Plus theyre all shiny and you cant put a price on shiny, can you? Now....If youre not a mental tree stump and words with more than 3 syllables dont frighten you, then by all means, continue on! General Complaint: These are covered in some kind of oil and dont spin. Rebuttal: That is CORRECT! The insides are packed with grease which is thick. Think cooled bacon grease. When you reheat cooled bacon grease, what happens to it? It thins out and becomes more viscous, right?? Same thing applies here. These are packed with grease because theyre designed to be run in machines for long periods of time. Which means heat from rotational friction, which means the grease viscosity inside the bearing thins due to thermal conduction. This is WHY they were built the way they come in the box. So you can use them in machine type applications right out of the box, where thermal friction needs to be considered. Ok, but can I still use them for skateboard or roller skate wheels though? YES, you can but you need to do a little work first. No big deal if youre not lazy. If you want these bearings to spin like a fidget spinner and go whizzzzzzz, you have to dissolve the grease inside the bearings and use a thinner lubricating agent in its place. WayneChicago goes over how to do just that in his review. So I dont have to. Thanks, Wayne! *fistbump* And if you cant find WayneChicagos review, dont act like you dont have Google. Just look up How to dissolve grease in ball bearings. This isnt rocket science... As far as I can tell, the outside grease feel is just machining oil which is often times applied to metal surfaces as a water repellant to keep the surfaces from rusting due to atmospheric conditions. Wood workers and machine shop operators know exactly what Im talking about. Probably some mechanics too. Why would they do that? Well...where are these things made? Is there any water that might get into the bearings in transit from the factory to your house? Yeah, there is. Theres literally an ocean of it. Highly corrosive salt water to boot. So, in order to make sure these dont arrive as little jammed up rust cakes at your doorstep courtesy of the Amazon delivery guy, they coat them in a light oil or maybe even some of the inner grease to prevent that from happening. Youre WELCOME!! Its a prophylactic measure against people who dont know better. And also so people dont buy these and end up in their review section complaining about that too. Like so many other people are out here doing. The people complaining simply dont know what they dont know. And are trashing a decent product for the price from a company that is CLEARLY putting in an honest effort to deliver value to the consumer for a VERY REASONABLE PRICE. Some of these might have manufacturing defects, Some might last longer than others. When I bought mine they were under $0.30 each. Im not putting mine under heavy load for long durations anyways, and Ill have PLENTY of replacements should some of them give out, as they sometimes do. I have not tested them yet but I dont need to to know that I DID NOT get screwed on the transaction. This is EXACTLY what I expected and Im sure will exceed my expectations in performance. Sure, you get what you pay for. But if you know what you need to know before making a purchase, youll find INCREDIBLE value in these bearings given youre buying them for the right application. If you find yourself with a chapped ass complaining about this product because you didnt know what you needed to know before making the purchase, chances are you also didnt take my advice and spring for the BONES. And thats on you, playa... -5 Stars.

Don’t spin as freely as I would have hoped ended up buying another brand to be able to do what I was trying

So I opened the a contaner, each one has a set of ten. First thing I noticed is the seals looked odd. So I pop one out, they are plastic, not rubber of any kind. Thereis very very little grease inside, could be a good thing or bad depending on your use. My intened use is for a bearing to last so I need grease inside. So I check 10 more same thing. That takes me to the biggest problem. These called seals you can see the balls inside with the seals in place from the factory. No way will they seal in the grease or keep dirt out.