Hydraulic cylinders are mechanical devices that use pressurized fluid to create linear motion. They consist of a cylindrical barrel, a piston, and two end caps. When hydraulic fluid is pumped into the cylinder, it pushes the piston, causing it to move. This movement can be used in various applications, such as construction machinery, automotive systems, and industrial equipment. These cylinders are essential in systems that require heavy lifting or precise movement. They are commonly found in excavators, forklifts, and presses. The efficiency and power of hydraulic cylinders make them vital components in many modern machines and tools.