Determine the type of metal to be processed
Each metal has different properties, which is also the first factor we need to consider when choosing a metal-cutting oil. Which, metals such as copper, and aluminum, just need to choose ordinary cutting oil. In contrast, metals such as stainless steel, and heavy metals need to choose a high-performance metal cutting oil.
For metals with difficult machining positions, the oil will need more additives such as extreme pressure, and anti-adhesive to protect the tool as well as the quality of the workpiece. As for metals such as copper, aluminum, carbon steel, and alloy steel, we need to use cutting oil with lubricating additives, friction modifiers, light extreme pressure additives, and anti-stick welding.
Determine what type of metalworking machine to work with
Different machines are suitable for different oils. In there:
• Screw processing machines often have cross-contamination between lubricating oil and metal cutting oil, so they are suitable for general-purpose metal cutting oils that can be used in lubricating oil tanks, hydraulic systems, and cutting oil tanks.
• Crushers and deep hole drills often require low-viscosity oil for a high cooling rate, good planning, and discharge of the workpiece. Nose grinders require a higher viscosity of oil than flat mills.
Rotational speed and machine operation
For simple machining operations, it is only necessary to use metal cutting oils with light extreme pressure resistance and low viscosity oils such as rotating, drilling, forming, etc. Complicated machining requires high-viscosity oil, EP, Sulfur, and Chlorine extreme pressure additives such as threading, spiraling, broaching, boring, etc.
Instructions on how to mix metal-cutting industrial oil
There are two types of metal-cutting industrial oils: water-based metal-cutting oil and water-free metal-cutting oil. For water-based metal cutting oils, how will we mix the water with the oil-water ratio? Here are detailed instructions:
Mixing oil with water will depend on your machining process. You should use water that has been treated, remove impurities, and especially, do not use water containing Mg metal because it will easily cause fire and explosion. When mixing water, we will add water first and then add oil, stirring well. If you find that the cutting solution after mixing has a low concentration, we can add oil to make the solution just right, providing the best effect for the job.
Note: you need to check the pH of the cutting solution before use. Most machine manufacturers recommend that we change the machining oil solution at a certain PH. And to do this, we just need to sample the solution and check the pH with a refractometer to measure the oil component concentration when used.
To know if the cutting solution is acidic or neutral, you should measure the pH and whether it is harmful to the machine or not, has the ability to corrode the workpieces or not; we will check the pH of the solution with blue litmus or use a pH meter.
