A 3D printable support-free, small, light and efficient 80mm (~3 1/8”) Line Bobbin to wind line, tread, string, cord, wool and other items.
The part can be easily 3D printed, without any support, on a modern inexpensive 3D Printer. It can be printed with a variety of materials, including PLA, PETG, ABS, ASA and many other types of printable materials.
PETG works very well for this application. It is easy to print. The object should be durable, easy to maintain, and last for a long time.
PLA should work as well as long as the part will not be used, stored or kept at in a high temperature environment, exceeding ~55 C (~ 130 F), such as a parked car in the summer.