A hydraulic piston is a cylindrical component used in hydraulic systems to convert fluid pressure into mechanical force. It moves within a cylinder and is typically made of metal or durable materials. When hydraulic fluid is pumped into the cylinder, it pushes the piston, creating linear motion that can be used to perform work, such as lifting heavy objects or operating machinery. Hydraulic pistons are commonly found in various applications, including construction equipment, automobiles, and industrial machinery. They are essential for systems that require precise control and high force output, making them vital in many engineering and manufacturing processes.