The maximum sewing speed of this series of models can reach 7000 revolutions per minute; It can automatically lift the presser foot, install suction and cutting devices, and use a computer direct drive built-in servo motor to save about 60% electricity; Install oil suction devices on the needle bar and rocker to avoid oil leakage; Single support rod structure, easy to achieve high-speed operation; The needle rod mechanism is enclosed to prevent dust inhalation, prevent wear and oil leakage of the needle rod; Install an oil filter to improve the cleanliness of the oil and ensure high-speed operation; Maximizing the operating space, making the operation more comfortable, convenient, and ensuring the beauty of the sewing thread.