In industrial and mobile hydraulic systems, the selection of the right oil is critical to ensure efficient performance and extended machinery life.
The difference between 46 and 68 hydraulic oil lies mainly in their viscosity, which impacts their behavior in different operating conditions.
Difference between 46 and 68 hydraulic oil
In this article, we will explore their key differences and provide recommendations for choosing the ideal hydraulic oil according to the specific needs of each piece of equipment.
Difference between 46 and 68 hydraulic oil in terms of viscosity
Hydraulic oil viscosity is the resistance of a liquid to flow. In the case of hydraulic oils, proper viscosity ensures efficient lubrication of hydraulic system components, preventing premature wear and improving machinery performance.
The ISO VG (Viscosity Grade) classification categorizes oils according to their kinematic viscosity at 40°C. In this system, ISO VG 46 has a viscosity of approximately 46 cSt (centistokes). In this system, ISO VG 46 oil has a viscosity of approximately 46 cSt (centistokes), while ISO VG 68 has a viscosity of 68 cSt. This difference directly impacts its use and application in different operating conditions.
Thus, viscosity is the main difference between 46 and 68 hydraulic oil. Hydraulic oil 46 flows more easily at normal and low temperatures. Hydraulic oil 68, on the other hand, is thicker and designed to withstand higher load conditions and elevated temperatures without losing its lubricating properties.
Difference between 46 and 68 hydraulic oil in terms of behavior
Viscosity directly affects the behavior of the oil under different temperature and pressure conditions. Hydraulic oil 46 is ideal for colder environments or machinery operating at higher speeds with lower loads.
On the other hand, 68 oil is more resistant to high temperatures and maintains its viscosity better under high loads, preventing loss of lubrication under extreme conditions.
Difference between 46 and 68 hydraulic oil in terms of application
Each type of hydraulic oil is best suited to certain equipment and operating conditions:
- Hydraulic oil 46. Recommended for machinery operating in cold or moderate climates, hydraulic systems with high speed components and applications in the automotive industry, light manufacturing and agricultural equipment.
- Hydraulic oil 68. More suitable for machinery working in high temperatures, systems with heavy loads and equipment used in construction, mining and heavy industry.
How to choose between 46 and 68 hydraulic oil
Selecting the right hydraulic oil involves considering several key factors:
- Operating temperature. The ambient and operating temperature of the machinery influences oil selection. In cold climates or equipment with frequent low temperature starts, ISO 46 is preferable. For hot environments or machinery that generates a lot of heat, ISO 68 offers better performance.
- Manufacturer’s recommendations. Each equipment has technical specifications provided by its manufacturer. It is essential to follow these recommendations to avoid performance problems or damage to hydraulic components.
- Load and speed conditions. The type of operation is also a determining factor. Equipment with high speeds and low loads work better with lower viscosity oils such as ISO 46, while those subjected to high loads require more viscous oils such as ISO 68 to ensure adequate protection and lubrication.
Get the right hydraulic oil for your equipment with American Petroleum
At American Petroleum, we offer high quality hydraulic oils in ISO 46 and ISO 68 presentations, formulated to guarantee the efficiency and durability of your hydraulic systems. Our products meet the most demanding industry standards and adapt to diverse applications in sectors such as construction, agriculture, manufacturing and transportation.