Functionality The shuttle hook works by catching the upper thread from the needle and looping it around the bobbin thread which is necessary for creating a secure stitch Design Typically shaped like a halfcircle or a crescent the shuttle hook rotates or oscillates to perform its task efficiently Its design allows for smooth movement and precise stitching Types There are different types of shuttle hooks including rotary and oscillating hooks Rotary hooks rotate continuously in one direction offering smoother operation and faster stitching while oscillating hooks move back and forth Maintenance Proper maintenance such as regular cleaning and oiling is essential for the shuttle hook to function effectively preventing skipping stitches and ensuring the longevity of the sewing machine