Creating Larger Forces with Differential Roller Screws (.PDF Download)

Power density is one of the primary reasons why design engineers and manufacturers rely on hydraulics when they want their machines to move something. Hydraulic systems offer very high force density in a compact, relatively economical design. But inherent drawbacks to hydraulics are leading design engineers and manufacturers to consider an electromechanical system as an alternative to its hydraulic counterpart. One way to do this is by replacing the hydraulic cylinder with an actuator and screw driven by an electric motor...

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