Hydraulic oil is a fluid used in hydraulic systems that transfers energy through pressurized fluid. It is a mineral base hydraulic oil and contains additives for improved performance. It is used to lubricate, seal, and cool the system, and also helps to transmit power.

- High viscosity index: Anti-wear hydraulic oil is typically formulated with a high viscosity index, which means that it maintains its viscosity over a wide range of temperatures. This helps to ensure that the oil provides adequate lubrication and protection even in extreme temperature conditions.
- Anti-wear additives: It contains additives that are specifically designed to reduce wear and tear on hydraulic components, such as pumps, valves, and cylinders. These additives form a protective film on metal surfaces that helps to prevent metal-to-metal contact and reduce friction. The right hydraulic fluid types play a vital role in extending equipment life.
- Rust and corrosion inhibitors: It also contains additives that help to protect hydraulic components against rust and corrosion, which can cause damage and reduce the lifespan of the equipment. Choosing a trusted hydraulic oil manufacturer or hydraulic oil supplier ensures you get a high‑quality fluid that delivers long‑term reliability.
- Foam inhibitors: It is also formulated with foam inhibitors that help to reduce the formation of foam, which can cause cavitation and reduce the effectiveness of the hydraulic system.
Overall, anti-wear hydraulic oil is an important component in many hydraulic systems, and it is essential to choose the right hydraulic fluid types for the specific application to ensure optimal performance, long‑term reliability, and smooth hydraulic fluid power operation.
IS 11656 is an Indian Standard specification for hydraulic fluids. It covers several grades of hydraulic oil, including:
- Grade HM: This grade of hydraulic oil is formulated for use in hydraulic systems that operate at high pressures and temperatures. It has a high viscosity index and good anti-wear properties.
- Grade HLP: This grade of hydraulic oil is formulated for use in hydraulic systems that operate under moderate conditions of pressure and temperature. It has good anti-wear properties and good resistance to oxidation.
- Grade HVLP: This grade of hydraulic oil is formulated for use in hydraulic systems that operate under high-pressure conditions. It has a high viscosity index and good anti-wear properties.
- Grade HV: This grade of hydraulic oil is formulated for use in hydraulic systems that operate under high-pressure conditions. It has a high viscosity index and good anti-wear properties.