Several factors determine which materials are most suitable for a given device.
Most common materials are available in a variety of sheet, tube and bar stock shapes. The number of kinds and wide range of mechanisms is so large as to make a complete list impractical, so if it obeys the laws of physics and your budget, we can probably make it. The following types of actuators have specific advantages and disadvantages. Hydraulic Drive Systems Hydraulically-driven cylinders, rotary actuators and grippers provide a fast response and a controlled rate of movement from the energy of a liquid delivered under pressure from a pump. Working with the Department of Orthopaedic surgery, a hydraulically driven intramedullary canal telescopic bone lengthening rod was created in a feasibility study.