The Belt controle gearmotors Varibelt are versatile-able electric drives with capacities are ranging from 0.18 to 4 kW and maximum transmit output torques to 5000 Nm. The wave speeds can be in the ratio 1:6 or 1:8 in the rev range 0.12 to 2970/min infinitely adjustable. These engines are helical reduction gear, belt and variable speed AC motor combined into one space-saving design.