The needles and needle mechanisms are beefed up in heavy-duty sewing machines as well. They use thicker, stronger needles to penetrate heavy fabrics without bending or breaking. The needles are inserted into more heavy duty needle bars and mechanisms to provide stability and vibration resistance at high speeds and with heavyweight needles. This also allows the use of dual needle systems for specialty stitches.

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.

What are the applications of extra heavy duty sewing machines?

Advantages

Understanding the Functionality of a Serger Machine