Metal Bobbin Case with Closed Front SINGER (Ref. 173058)

The bobbin case is the heart of a sewing machine's rotary system. When this vintage metal component experiences wear and tear, drops, or loss of tension in the spring, the machine starts to loop the thread, break the thread, or create irregular zigzag stitches.

This replacement part restores millimeter-precise tension control and perfect thread gliding to your classic machine. This is the "Closed Top / Closed Front" version, an essential and highly sought-after part for the repair and restoration of legendary mid-20th century heavy-duty SINGER sewing machines.