tabletop ironing board cover and pad_washable coloring tablecloth

Lock sewing, often referred to as “lock stitch sewing,” is a technique that utilizes two threads—one from the needle and the other from the bobbin—to create a secure stitch. The stitches interlock at the seam, making it less prone to unraveling. This method is widely used in both industrial and home sewing machines because of its efficiency and the neat finish it provides.

1. Type of Overlocker There are several types of overlockers on the market, each designed for specific tasks. Common types include 2-thread, 3-thread, and 4-thread overlockers. The more threads used, the more robust the stitching. Assess your production needs to determine the right type.