What is the difference between gear oil 220 and 320?

1 Answers
Susanna
07/29/25 5:36pm
Here is the relevant information about the differences between 220 and 320: 1. The 220 grade is thinner than the 320 grade, while the 320 grade is thicker than the 220 grade. The specific parameter indicators are slightly different. The kinematic viscosity (100°C)/(mm2/s) for the 220 grade is 198~<242, and for the 320 grade, it is 288~<352. Other parameters are basically the same. It is essential to select the appropriate grade according to the equipment's instructions, and they cannot be used interchangeably. 2. The 220 and 320 gear oils refer to medium-load gear oil CKC, representing medium extreme pressure gear oil, generally used in machine equipment such as gearboxes, reducers, turbines, and gear cases. The characteristics of this series of lubricants include good load-carrying capacity and anti-scuffing properties; excellent thermal stability and oxidation stability; good adhesion; and they are free of solvents, asphalt, heavy metals, and chlorine, meeting environmental requirements.
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