Henan and Hebei Grid Couplings production plant in Zhengzhou Fest coupling structural features: Fest JS type serpentine spring coupling drive features and advantages are as follows: 1, Grid Couplings good damping long service life. Serpentine spring coupling halves axially embedded in more than 36%. Trapezoidal cross-section serpentine spring coupling with high-quality spring steel, strict heat treatment and special processing, with good mechanical properties, so that the service life of the coupling than the non-metallic elastic element coupling (eg elastic sleeve pin, nylon rod coupling pin) greatly increased. 2, Grid Couplings withstand changes in load range, starting safety. Two coupling halves in contact with the reed tooth surface is curved, when transmitting torque increases, the springs along the tooth arc deformation, so that the two coupling halves the force acting on the point near the reed. Reed contact point with the tooth surface that the torque change is the transmission torque as changes in the size, and its transmission characteristics are variable stiffness. Thus it has a flexible coupling than can withstand a greater load variation. Power transmission toothed deformation along the reed generated when the buffering effect, especially when the machine is started or when a strong impact load, to a certain extent, to protect the security of matching parts. 3, serpentine spring coupling transmission efficiency, reliable operation of the coupling transmission efficiency by measuring up to 99.47%, and its short-term overload capacity of twice the rated torque, safe and reliable operation. 4, serpentine spring coupling, low noise, good lubrication aluminum casing to protect the spring to avoid running thrown out, and the housing stocked with butter, not only the well-oiled, and makes noise when the reed is engaged butter damping absorption eliminated. 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