This is a replacement part I made for my Singer Fashion Mate 237 sewing machine. It is the gear like plastic bit that holds the thread take-up spring in place. The plastic had deteriorated, and it could no longer hold the spring. I think it will fit many other models of vintage Singer sewing machines that have a similar thread tension assembly.
To replace, remove the original gear, press fit the new gear in place. If the fit is too tight, you can drill out the hole a bit and use glue to secure it in place.
Made in Fusion 360 by measuring the original gear and stud.
Printed with stock Ender 3 Neo, Hatchbox PLA - Gray, 0.2mm layer height
The author marked this model as their own original creation.