Tonmp 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)

A spray can of white lithium grease is 100% necessary to get them moving. One bad one out of the 20 I lubed. Worth it though considering how cheap this is for 100.

Some are super smooth and some are a little gunked up and probably need to be taken apart and reoiled. But I find them addiquite for my some 3d printed parts I made.

Must clean and use lite oil..

As described

Picked these up for putting into 3D prints. I am using these bearings in low stress environments so I cannot comment to how they will perform in heat or high RPM uses. This cheap 50 pack is working well in my custom spool holders for my 3D printers. I have replaced the stock spool holders in my Anycubic Mega X, FLSUN Q5, and Creality Ender-3 with spool holders that use these bearings and they work fantastically.

Bought 200 of these. Briefly looked at all of them when they arrived. Three had obviously damaged seals. One was damaged enough prevent smooth rotation. Clearances are sloppy, but I didnt attempt to measure that. Seem to be a good value for non critical applications.

Great product! Would find a way to expedite shipping time!