The prices seem similar, how to choose longer-lasting hydraulic oil? 5 methods to instantly make you an expert in selecting oil!
Choosing the cheaper option risks faster wear and frequent oil changes, which could cost more in the long run.
Opting for the expensive one, on the other hand, might feel like a waste of money if the differences aren’t clear.
Have you ever found yourself torn like this when selecting hydraulic oil?
Hydraulic oils may appear similarly priced, but their “hidden costs” can vary dramatically: accelerated equipment wear, more frequent downtime for oil changes, and rising energy consumption… The money you seemingly save upfront may eventually be paid back twofold in maintenance costs!
Don’t let a “similar” price lead to vastly different outcomes!
Here are 5 easy-to-understand tips to help you choose hydraulic oil that extends service life and saves you money.
Hydraulic oil with poor anti-wear performance acts as a “hidden killer” of equipment wear! To evaluate its true wear resistance, remember these two key indicators:
- Maximum Non-Seizure Load (PB Value) → The higher, the better!
A higher PB value indicates that the oil can maintain an unbroken lubricating film under extreme pressure, providing stronger wear protection.
- Wear Scar Diameter → The smaller, the better!
A smaller wear scar reduces friction between components and extends the service life of critical parts such as pumps and valves.
The Rotary Oxygen Bomb test (simulating high-temperature, high-pressure oxidation conditions) directly reflects the service life of hydraulic oil. Longer Rotary Oxygen Bomb test time → Better oxidation resistance → Extended oil change intervals!
The Rotary Oxygen Bomb test is a method used to evaluate the oxidation resistance of lubricating oils. In this test, 50 grams of the oil sample, 5 ml of water, and a catalyst (copper wire) are placed into the oxygen bomb vessel. After purging with oxygen, the vessel is immersed in a 150°C oil bath and rotated at 150 rpm. The pressure inside the vessel rises to a maximum value and then begins to decrease. The test concludes when the pressure drops by 175 kPa from its peak. The time elapsed from the start of the oil bath heating until the end of the test represents the oxidation life of the Lubricating Oil.
Demulsibility: Rapid Water Separation Capability
Hydraulic systems are prone to water ingress. If the oil has poor demulsibility, it can mix with water to form a “milky white” emulsion, which not only damages the lubricating film but also corrodes components.
Test Method:
Pour 40 ml of oil and 40 ml of water into a graduated cylinder，place the cylinder in a 54°C water bath, stir the mixture for 5 minutes, then let it stand for 30 minutes, observe the degree of separation between oil and water.
10,000-Ton Testimony”: Real Reliability Proven in Large-Scale Equipment
Impressive data is just the beginning—true performance is proven under extreme conditions. In China, massive 10,000-ton industrial equipment requires exceptionally rigorous oil selection, and they consistently choose Macan Hydraulic Oil