Pneumatic Brakes Rival Hydraulics (.PDF Download)

One of the most fundamental reasons why designers choose hydraulics or pneumatics over electromechanical power transmission is power density. Both forms of fluid power can transmit higher force and velocity from a comparable actuator that is much smaller and lighter than anything offered by electromechanical technology. And because heat generation limits duty cycles of electric motors, fluid power solutions (especially pneumatics) generally can operate continuously at high cycle rates...

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