Double Head Box Stitching Machine

The needle pushes the thread down through the material, forming a loop that catches on a hook on the shuttle. The loop wraps around the bobbin thread as the needle pulls the next section of thread back up through the material.Even though more than 95% of the sewing machines used in factories are rectangular in shape and of standard size of 42” X 21”, there have been instances of lockstitch and overlock sewing machines being of 47” X 22” and 54” X 28” dimensions. 21