These small, toothed metal components reside beneath the needle plate of a sewing machine. Their synchronized up-and-down and forward motion grips the fabric, advancing it with precision for consistent stitching. This mechanism is essential for straight seams, curved patterns, and intricate embroidery.
Consistent stitch length and controlled fabric movement are fundamental to quality sewing. Without this crucial element, achieving even, professional results would be nearly impossible. The development of this technology revolutionized the speed and consistency of garment production, contributing significantly to the evolution of the modern sewing machine.