What is bobbins?

Bobbins are small, cylindrical spools that are used in sewing machines and other textile machinery to hold thread. They are typically made of plastic or metal and vary in size and shape depending on the machine they are used in. Bobbins are inserted into the bobbin case or shuttle of the sewing machine and wound with thread before being inserted into the machine. The thread is then pulled through the machine's needle and used to stitch fabric or other materials together. Bobbins come in different types, such as top-loading, side-loading, and drop-in, which each have their own unique threading methods. Properly winding and threading bobbins is essential to the success of a sewing project, as it helps to ensure even, consistent stitches and prevents thread tangling or breaking.