ATPWONZ 50 PCS 608ZZ Carbon Steel Bearings, Deep Groove Ball Bearings Ball Transfer Unit for Industrial Machinery Parts, Automobiles, Skateboards (8mm x 22mm x 7mm)

As a 3d printing person bearings are ALWAYS handy to have around for making projects that require mechanical movement and these offer great value as you get 50 bearings in a pack! Some projects I've been doing recently require as many as 14 of these for assembly which can get expensive fast. This really helps for the hobby enthusiast.They do seem to be packed quite heavily with grease and as such don't roll all that fast and need to be used a few times to "Free them up" and help things spread out / thin out but after that they seem to be just fine.I wouldn't be inclined to use them in anything that's going to be used in heavy duty environments personally, but for what I'm using them for they are just fine. Would also work fine on skate gear so long as you aren't highly picky about performance and ABEC ratings etc.

608ZZ and theyre the perfect size for the majority of 3d prints that required bearings, they work well, a little stiff at first, but they come pre-greased and once it heats up a little spin quite well. Fantastic