Hydraulic oil is a specialized fluid used to transmit power in hydraulic systems, such as pumps, motors, and cylinders. It acts as both a lubricant and a medium for energy transfer, ensuring smooth and efficient operation. One of the most important factors when selecting a hydraulic oil is its viscosity grade, which indicates the oil’s thickness and flow characteristics. A common standard is the ISO VG (Viscosity Grade) classification—for example, ISO VG 32, 46, or 68.
Proper lubrication and redused wear
Choosing the right viscosity ensures proper lubrication and prevents excessive wear or energy loss. If the oil is too thin, it may not provide enough protection; if too thick, it can reduce system efficiency. Hydraulic oils typically perform best between 40 °C and 60 °C, where they maintain stable viscosity and lubricating properties. It’s also important to consider the oil’s oxidation stability, anti-wear additives, and compatibility with system components to ensure long equipment life and reliable performance.