Ugger-style yarn spool with weighted design

This design is similar to an Ugger yarn spool, featuring an internal counterweight block design. Use 39x69x3 metal washers; you can search for specifics on Duoduo. The bearings are 6802; for smooth rotation, use the free-spinning type, and for heavier threads, the covered type is recommended. The plastic screws are designed for split, flat printing to prevent breakage. After printing, glue them to the main shaft. If the 6802 bearings are too tight during installation, heat the installation area with a hairdryer before inserting them. Once inserted, use a thick convex washer on the bearing and a thin washer on the bottom end, then secure it with an M5-20 screw and nut. The turntable is then glued onto the thick washer with the screw installed, completing the assembly.