This is a replacement part for a Singer Classic bobbin winder. The part is very similar on other machines (Singer Serenade, etc.). It's very similar to the following part SKUs, but none are an exact replacement due to the position of the spring or additional winder wheels:

• K6A0555000
• 416700601
• V61165000
• E4B8284210

Supports will be needed and you may need to gently sand the shorter tube. I printed at 15% infill in PETG. My only concern is heat caused by the rotation of the bobbin winder, so be gentle on the foot pedal!

You should be able to remove the black plastic/rubber o-ring piece from the medal shaft of the broken winder. Try heating up the plastic slightly and using a pin to push out the shaft. It is necessary to do this to fit the replacement part.

Enjoy!