Many heavy duty machines have advanced automatic features not found in standard machines. These include automatic presser foot pressure and lift, automatic needle threaders, shaft driven auto-threaders, and automatic reverse and tie-off stitches. These automate tedious tasks for efficiency and consistency in high-volume sewing.
Another important aspect is the feed mechanism. Sewing machines with a walking foot are particularly advantageous for leather. This feature ensures that both the top and bottom layers of the leather are fed through the machine at the same rate, preventing puckering and uneven stitching. Some machines also come equipped with a roller foot, which helps glide over the leather’s surface smoothly.