Functions of a Sewing Machine
The bobbin is a low spool which holds lower thread, interlacing with needle thread to form stitches on fabric.
Needle and Thread
The needle portion of your sewing machine carries thread from your top thread into its base plate that houses the bobbin. As the needle moves up and down, it captures thread from its bobbin and forms stitches.
A needle consists of multiple parts, including its eye (hole) through which thread passes and an eye size that varies with needle types; its tip usually conforms to its intended use. A shank provides support and has a shoulder which reduces …