The position of the needle as it enters and exits the leather is fundamental to achieving secure stitches. Ideally, you should hold the leather firmly but not excessively tight, as this can distort the material. When inserting the needle, aim to enter the leather at a 90-degree angle to maintain consistent stitch depth. This angle not only ensures a cleaner penetration but also helps create uniform spacing between stitches.

A lock stitch is created by interlocking two threads—a top thread and a bobbin thread. The top thread is fed through the needle and forms a stitch on the front of the fabric. The bobbin thread, located in a lower compartment of the machine, loops up to meet the top thread, forming a secure stitch that is often used for a wide array of sewing applications. This type of stitch is characterized by its tightness and durability, making it suitable for sewing heavier materials such as denim and canvas, while also being gentle enough for lighter fabrics.

An industrial serger machine, also known as an overlock sewing machine, is a type of sewing machine that uses multiple threads (usually two to five) to stitch and finish seams. Unlike traditional sewing machines that only create a single line of stitching, sergers can sew, cut, and finish edges all in one step. This capability not only saves time but also enhances the overall durability and stretch of the garment, making it ideal for stretchy fabrics like knits and jerseys.

Moreover, owning a sewing machine can lead to cost savings over time. Instead of purchasing finished jute bags from suppliers, manufacturers can produce their own bags, controlling quality, design, and stock levels. This vertical integration can lead to higher profit margins and improved competitiveness in the market.

First, let me clarify this question I frequently bump into: this is a type of sewing machine designed to handle tough fabrics and thicker materials such as denim, canvas, and leather - better.