Description This machine adopts a connecting rod type feeding mechanism, stable operation, small back stitch error, uniform stitch and beautiful appearance. It is suitable for sewing all kinds of thin and medium-thick material clothing, fabrics, etc. in clothing, knitting and other industries. The automatic lubrication device and the silicone oil lubrication thread device are used, so the sewing performance is extremely stable. At the same time, the use of a double-threaded large rotary hook greatly improves the sewing efficiency. It is suitable for sewing jeans, tents, leather products, etc. It is a heavy duty flat sewing machine with stable performance.