Extreme pressure additive-based cutting oils are effective for machining any material at cutting speeds not exceeding 60m/min. At high speeds, due to the high heat generation, the thermal conductivity of oil-based cutting fluids is poor, which can cause excessively high temperatures in the cutting zone, leading to phenomena such as oil misting and fires. Additionally, the high temperature of the workpiece can cause thermal deformation, affecting the machining accuracy of the workpiece. Therefore, water-based cutting fluids are often used.

Generally, water-based cutting fluids should be selected under the following circumstances:

High-speed cutting and large feed rates can cause the cutting zone to exceed high temperatures, resulting in intense smoke and a fire hazard.

Considering the process flow from both the preceding and subsequent operations, the use of water-based cutting fluids is required.