This document defines common parts and components of a sewing machine, including the bobbin which holds the bottom thread, the bobbin case which regulates bottom thread tension, and the bobbin winder which automatically fills bobbins. Other parts mentioned are the face plate, feed dogs, hand wheel, needle clamp, presser foot, presser foot lifter, reverse control, slide/lift plate, spool pins, stitch length regulator, stitch width control, tension control, thread take-up lever, and throat plate.