Hidraulic

Hidraulic is not a distinct technical term in English; it is most often a misspelling of hydraulic. The standard English word hydraulic derives from the French hydraulique and ultimately from Greek hydor, meaning water, and refers to the science and technology of transmitting and controlling power by means of liquid fluids.

In engineering, hydraulic systems use incompressible fluids to convey force, allowing a small input force to produce a larger output force, often with controlled motion. This enables clamping, lifting, pressing, and precise actuation in a variety of machines. Key principles include fluid pressure transmission and, in many cases, force multiplication.

Typical components of hydraulic systems include pumps, reservoirs, actuators (cylinders), valves, filters, and hoses. Fluids commonly used are mineral oils or synthetic blends, selected for properties such as lubricity, thermal stability, and fire resistance. System design addresses pressure ratings, leak prevention, and routine maintenance to mitigate environmental and safety risks.

Hydraulic technology is widely applied in construction equipment, manufacturing machinery, braking and steering systems, aerospace controls, and industrial presses. The term hidraulic may appear in documentation or informal writing as a misspelling; the correct term is hydraulic.

Related topics include hydraulics, fluid power, and pneumatics.