The third tension asf is typically located on the bobbin case or shuttle hook assembly and is designed to ensure that the lower thread is fed smoothly through the machine and forms high-quality stitches. It works in conjunction with the upper tension system, which controls the tension of the upper thread.
When the third tension asf is properly adjusted, it maintains the correct level of tension on the lower thread, allowing it to feed smoothly through the machine and create even and consistent stitches. However, if the third tension asf becomes worn or damaged, it can cause the tension to become uneven or unstable, resulting in poor-quality stitching or even thread breakage.
Replacing the third tension asf with a new one is a straightforward process and can help to restore optimal performance to a sewing machine’s tension system. It is important to select the correct third tension asf that matches the make and model of the sewing machine, as well as to properly calibrate the tension system after installation to ensure that it is working correctly.