
Wet clutches are not only used in automatic transmissions. With the maturation of manufacturing technology for stable oil film friction materials, some heavy-duty tractors and dump trucks abroad have adopted wet clutches in place of mechanical dry friction clutches. The advantages of this clutch: The relative friction surfaces do not directly rub against each other; instead, they are separated by an oil film approximately 0.1mm thick, creating a liquid or semi-liquid interfacial friction. Due to the low friction coefficient, the clamping force is about ten times greater than that of a dry clutch. Differences between dry and wet clutches Dry clutches require frequent gear shifting operations during use. Unless the driver is highly skilled, the controllability is generally inferior compared to wet clutches.


