This essential component transfers power from the sewing machine’s motor to its handwheel or pulley system, enabling the needle and other moving parts to function. A typical example is a rubber loop, often reinforced with fibers, that fits snugly around designated grooves in the motor and handwheel. Different machines require specific types, varying in length, width, and material composition.
Proper function relies heavily on this power transmission component. Without it, the machine remains inert. A correctly fitted and maintained one ensures smooth operation, consistent stitching, and prevents premature wear on other machine parts. Historically, various methods powered sewing machines, from treadles to hand cranks. The development of motorized machines led to the adoption of this crucial link, significantly increasing speed and efficiency.