Adjustable speed belt gear motors are space-saving, constantly adjustable drives. In the standard edition the central adjustment is made with a hands wheel. Unlike inverter procedure the engine power remains continuous and the torque improves if the speed of the engine drops.
The variable speed gear unit housing includes a tested symmetrical design. The adjusting pulleys have got a wedge 
designed symmetrical cross section with low mass. The shape of the pulleys guarantees uniform flank pressure and therefore high power transmission, actually at high belt quickness.
The effect is optimal Variable Speed Belt Gear Motors Speed Reducer Gearbox control behaviour with uniform distribution of forces and minimal energy consumption.