608zz Ball Bearings 608zz High Speed ABEC-7 Skateboard Bearings for Blenders, Skateboards,Scooters, Spinners, Roller 608 Skateboard Bearing (20)

I used some of these for 3d printer projects and they're perfect. I couldn't tell if they're the abec number they claim, but they're really good!

Used these to repair several furnace inducer motors. Bearings spin smooth and quiet, though since the seals are metal unable to check if they are properly lubricated without damaging them. On the original bearings they were a very snug interference fit on the shaft where these slipped on too easily. But easy enough to rectify with a little loctite to secure in place. Can't say how well they will hold up long term but saved hundreds by repairing instead of replacing and have plenty of spares if needed.