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