Product Appearance Display

Usage Demonstration

1、YS-4431D-M Tubular Twin-Needle Sewing Machine features synchronous feeding by the needle, feed dog, and presser foot to prevent fabric slippage and deliver neat, uniform stitches. Equipped with a slide-bar thread take-up and an imported vertical double-size rotating hook, it produces two parallel rows of lock stitches. The upper and lower shafts are driven by synchronous toothed belts, while stitch length is adjusted via a knob-type dial and feed direction is controlled by a lever-type forward/reverse mechanism for user-friendly operation. A clutch-type safety device is also included to protect the machine against overload damage

2、This model can be optionally equipped with an electronic positioning motor. During sewing pauses, the needle can be controlled to always remain either above or below the fabric, eliminating the need for frequent handwheel rotation and making operation more convenient

This product is widely used in sewing applications such as tents, arch structures, parachutes, hot air balloons, cushions, and sofas. It is particularly suitable for filter bags and ring‑shaped cylindrical items