The positive linkage among chain and gear wheel permits constant speeds despite having torque fluctuations and incredibly good reproducibility of speeds. Standard variable gear products force the transmission component by applying excessive force – this 
is unnecessary and PIV CHAIN CONVERTORS Variable Chain Drives decreases the degree of efficiency.
Variable chain drives apply a lever system, which applies only as much pressure on the slat chain as required. This results in low operating temperature ranges, long life, high power density and an excellent efficiency – also in the partial load range.