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AW 32 vs AW 46: When it comes to maintaining your hydraulic systems, choosing the right type of hydraulic oil is crucial. Among the various options available, AW-32 and AW-46 are popular choices due to their anti-wear properties. But what sets these two apart? Let’s dive into the details to help you make an informed decision.
Understanding Viscosity
The primary difference between AW-32 and AW-46 hydraulic oils lies in their viscosity. Viscosity is essentially a measure of how thick or thin the oil is, and it significantly impacts how the oil performs under different conditions.
- AW-32: This is a lighter, less viscous oil that flows more easily, especially at lower temperatures. It’s ideal for equipment that operates in cold weather conditions. For instance, if you’re dealing with snow plows or other outdoor machinery, AW-32 ensures smooth operation even in chilly environments.
- AW-46: On the other hand, AW-46 is a heavier, more viscous oil. It offers better film strength and protection at higher temperatures, making it suitable for systems that operate under heavy loads or at high speeds. Industrial machinery and construction equipment often benefit from the robust protection that AW-46 provides.
Factors to Consider
Choosing between AW-32 and AW-46 isn’t just about viscosity. There are several other factors you need to consider to ensure optimal performance of your hydraulic system.
- Type of Hydraulic System: Some hydraulic systems are more sensitive to viscosity changes. High-precision systems, for example, may require a more viscous oil like AW-46 to maintain proper operation.
- Operating Environment: If your hydraulic system is exposed to extreme temperatures or contaminants, you might need a specialized hydraulic oil. Ensure you assess the environment where your equipment operates to choose the most suitable oil.
- Manufacturer’s Recommendations: Always refer to the manufacturer’s guidelines for your specific hydraulic system. They usually recommend the type of oil that best suits their equipment, ensuring longevity and efficiency.
Table: AW 32 vs AW 46
Feature | AW-32 | AW-46 |
---|---|---|
Viscosity | Lighter | Heavier |
Flow at cold temperatures | Better | Worse |
Film strength at high temperatures | Worse | Better |
Suitable for | Cold weather applications | High load/high speed applications |
Which Oil Should You Choose?
Ultimately, the best hydraulic oil for your needs depends on your specific application. If your equipment operates in cold weather, AW-32 is likely your best bet. Conversely, for high-load or high-speed applications, AW-46 offers the protection you need.
If you’re still unsure, it’s always a good idea to consult with the manufacturer of your hydraulic system or a qualified hydraulics technician. They can provide personalized advice based on your equipment and operating conditions.
Choosing the right hydraulic oil can seem daunting, but with a bit of knowledge and guidance, you can ensure your systems run smoothly and efficiently. Happy machinery maintenance!
What is thicker hydraulic 32 or 46?
AW-46 hydraulic oil is thicker than AW-32 hydraulic oil. The number in the designation (32 or 46) refers to the viscosity grade of the oil; higher numbers indicate higher viscosity, meaning the oil is thicker and flows with more resistance.
For instance, AW-32 is a thinner oil that flows better at cold temperatures. On the other hand, AW-46 is thicker and provides better film strength at high temperatures. Therefore, selecting the right hydraulic oil is crucial for the performance and longevity of your equipment.
Can I use 46 hydraulic oil instead of 32?

While you might be able to use AW-46 hydraulic oil instead of AW-32, it’s not a straightforward yes or no answer. This is because AW-46 is thicker than AW-32, which can impact performance in several ways. For example, in cold weather, AW-46 might make the system sluggish at startup due to its higher viscosity.
Additionally, a thicker oil could lead to slightly slower response times or reduced efficiency, depending on the system’s tolerances.
While AW-46 and AW-32 are generally compatible, it’s essential to verify this, as mismatched oil types can sometimes lead to issues like seal wear or reduced lubrication effectiveness.
Therefore, it’s crucial to consider the manufacturer’s recommendations, the operating temperature, and the condition of your system before making a switch.
If you’re uncertain, consulting a qualified hydraulics technician can provide tailored advice for your specific situation.