Variable Speed Drive Pump Solutions With the costs of energy steadily rising, energy consumption is playing a more significant role than ever in the total cost of machine operation. As a result, the hydraulics industry is demanding energy efficient solutions that also meet stringent government regulations for environmental protection. Eaton's Variable Speed Drive and Pump Systems can help you cut energy usage by up to 70% depending on the machine duty cycle. This can help significantly reduce operating costs, so your investment can quickly pay for itself.