Radial Ball Bearing 685ZZ for 3D Printer This Radial Ball Bearing 685ZZ for 3D Printer/ Robot is a 5x11x5 mm Double Shielded Ball Bearing with 685ZZ ABEC-3 quality, 685ZZBearings are the popular item that could be used in many application that uses this size 5x11x5 mm bearings, each 685ZZ bearings are closed with 2 Metal Shields, one Shield from each side, to protect the bearing from dust or any possible contamination. Bearings come in various qualities. We have carefully selected the best quality bearings from numerous suppliers. This means our bearings are meant for continuous use and they'll last longer than other cheap bearings. Ideal for use in your 3D Printer, CNC project or robot. Its needed for most types of RepRap 3D printers. Our bearings come pre-lubricated from the manufacturer so that no additional lubrication is required to be applied. These protect the bearing from dust or any possible corrosion. check out : Universal Flange Ball Bearing 4x8x3mm Shielded Chrome Steel Bearings Applications: Mostly used for 3D printer wheel bearings, CNC, etc. Fit for skateboards, inline skates, roller skates, scooters, and other skating applications. Good replacement for the damaged bearings on the small power motor. Automotive gearboxes, machine gearboxes replacement parts.