bobbin

A bobbin is a cylindrical spool on which thread or yarn is wound. The term is used across textile work, including hand and machine sewing, weaving, and related crafts, as well as in certain areas of electronics. The bobbin serves as a supply of lower-thread material in a sewing system and also functions as a winding form for yarns in weaving and lace-making.

In domestic sewing, the bobbin provides the lower thread for stitches. It sits in a bobbin case beneath the needle plate, and the upper and lower threads interlock to form a stitch. Bobbins come in various shapes and sizes to fit specific machines; they can be made of plastic or metal and may be drop-in, front-loading, or center-pin types. Proper winding and correct placement are important to maintain stitch quality and tension.

In weaving and lace-making, bobbins hold individual strands of thread that are drawn through a pattern. Bobbin lace uses many bobbins arranged on a pillow or frame, with pins guiding the threads to create intricate designs. The arrangement and movement of the bobbins determine the pattern and texture of the fabric.

In electronics, a bobbin refers to a spool around which wire is wound to form coils for inductors, transformers, or electromagnets. The shape and material of the coil bobbin influence winding density, magnetic properties, and compactness of the final component.

Care and maintenance involve keeping bobbins clean and free of lint, replacing worn or damaged bobbins, and ensuring correct winding and thread tension to prevent jams or uneven stitches.