This machine is based on the S2 and S0 models, combined with the advantages of the KS three-roll mill, and has been improved. The main advantage is that the external reducer is integrated into the machine's gearbox, allowing the entire gear to be fully immersed in lubricating oil. This not only saves space and reduces installation hassle, but also saves energy and lowers maintenance costs. The viscosity range of the processed materials is expanded, making it an ideal machine for high-viscosity and high-hardness materials such as pencil lead, silicone rubber, blue guards, and reflex blue paste AG.