20 Tooth 8mm Bore Pinion Pulley.
These pulleys have a large 8mm bore and are designed to accommodate flanged bearings. Simply insert bearings on either side of the pulley and anchor with a M3 set screw. These pulleys allow belts up to 6mm in width. They can be used for building pan and tilt systems, 3D printers, camera sliders, XY tables, robotic drive mechanisms, etc.
Bearings not included