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)

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

Excelente producto seriedad del vendedor

Having been bitten by inconsistent measurements in the past (with other types of components), I measured one pack of 12 and found that the inside diameter was between 8.05 and 8.10mm, and the outside diameter was between 21.92 and 21.98mm. Id say these safely have a tolerance of 0.1mm, while my 3d printer typically has a tolerance of 0.35mm, so these should work pretty well for me and not significantly impact the tolerance of my builds.

They do spin, but dont spin well for my use, a couple came squished and dont spin at all

Wouldn’t recommended for skating either

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.

If youre using these for skateboarding or something else that puts them under heavy load WD-40 will probably ruin them, but for 3D printing if you give the bearings a quick shot they loosen right up.