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