Hydraulic Fluid Archives - RYCO Hydraulics
A beginners guide to hydraulics and fluid transmission

What does “Hydraulic” mean? The term "Hydraulic" is derived from ancient Greek. The word "hydraulics" originates from the Greek word hydraulikos which in turn originates from hydraulos meaning water organ which in turn comes from hydor, Greek for water, and aulos, meaning pipe. It's also defined as "operated by pressure transmitted through a pipe by a liquid, such as water or oil." [Collins Dictionary] How do hydraulic machines work? Generally speaking, a hydraulic machine gains controlled motion through the use of a transmitted fluid. There is a common assumption that a machine operated by a fluid is a hydraulic machine, but this is not always the case. The water wheel above on the left turns with the weight of the water. But it is not a hydraulic machine. A correct definition of a hydraulic system is one where motion and force output is created by the use of a pressurised fluid. In the case of the water wheel, the fluid is not entrapped, and therefore, pressure cannot be applied to it at any point. Blaise Pascal ...

Why force multiplication is key to how hydraulic systems work

What is force multiplication? Pascal's law states that pressure set up in a confined body of fluid, acts equally in all directions, and always at right angles to the containing surface. When a pressure is applied to a fluid trapped in a confined space, that pressure acts on each square millimeter of that surface. The force output of a hydraulic actuator is the result of the pressure applied, and the area to which that pressure is applied. If a given pressure is applied to two identical cylinders, then they will have an equal output force. How does force multiplication work? When the same pressure is applied to different sized cylinders, then the larger cylinder will have a greater force output. This is because the area which sees the hydraulic pressure is greater. The cylinder on the right in this example is twice the diameter of the cylinder on the left. The area of the circle multiplies the force The area of ...