Radial Ball Bearing 625ZZ for 3D Printer This Radial Ball Bearing 625ZZ for 3D Printer/ Robot is a 5x16x5 mm Double Shielded Ball Bearing with 625ZZ ABEC-3 quality, 625ZZBearings are the popular item that could be used in many application that uses this size 5x16x5 mm bearings, each 625ZZ 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 : Radial Ball Bearing 608ZZ for 3D Printer Applications: Mostly used for 3D printer wheel bearings, CNC, etc. Fit for skateboards, inline skates, roller skates, scooters, and other skating applications. Also check Radial Ball Bearing 625ZZ designed for 3D printers and robots . It comes in a pack of 4. The bearing is pre-lubricated with grease and made of 52100 Chrome Steel, offering durability with a typical surface hardness of 60-64 on the Rockwell hardness C scale. Its dimensions are Inner Bore=5mm