Technical sharing

The red engine temperature warning light is a serious warning that the engine is overheating or the cooling system is not working properly. If not handled properly, it can cause serious damage to the piston, cylinder head gasket or engine seizure. The following article provides detailed instructions on the cause, how to check and handle safely according to automotive technical standards.

Water standard for soluble cutting oil: water accounts for 90–95% of the solution, affecting the emulsion, lubrication and oil life. Ideal hardness 50–150 mg/L CaCO₃, pH 7–8; avoid using well water, only use RO/DI water after adjusting the hardness to the standard to ensure stability and machining performance

Instructions for water-soluble cutting oil management process for CNC system: cleaning tank and draining tramp oil, mixing properly “water first – oil later”, controlling concentration – pH – water hardness and periodic maintenance to prevent microorganisms, prolong oil life and maintain stable machining performance.

Instructions for preventing deterioration of water-soluble cutting oils by adding the correct stock solution ratio, maintaining pH and biocide additives, periodic disinfection and mold control, helping to stabilize the oil, keep it odorless, reduce corrosion and maintenance costs.

The article presents a practical example of copper discoloration and sticky cutting oil when using incompatible oils during machining. The cause comes from the reaction between the oil additives and copper ions, discoloring the product and increasing the viscosity of the solution. By switching to a specialized copper cutting oil – which is neutral, stable and does not react with non-ferrous metals – this phenomenon is completely overcome. The result is a shiny product, stable oil color, reduced oil change frequency and cleaning work, and improved production efficiency.

Foaming in water-based cutting oil is a common problem in CNC metalworking, turning, milling, grinding, etc. Foam not only causes the solution tank to overflow but also reduces the efficiency of lubrication, cooling and chip washing, affecting the machining quality and tool life. This article analyzes common causes and introduces technical solutions to effectively reduce foam, ensuring stable operation and high productivity.