The cutting oil suitable for plane drilling should have low viscosity and low surface tension, which can fully penetrate into the cutting area and take out the waste chips. When drilling in easy to machine metal, we can use water-soluble cutting oil or synthetic cutting fluid. For some difficult to machine metals, only oil-based cutting oil containing extreme pressure additives and low viscosity can be used. Stainless steel, heat resistant alloy and nickel alloy are special in steel, which contain high content of nickel and cobalt. < br style = "list style type: none;" / > they are hard and have low thermal conductivity, which leads to the formation of high temperature in the debris and the high temperature of the interface between the tool and the debris, resulting in rapid tool wear. The tool wear can be reduced by slowing down the speed and controlling the feed rate, so as to avoid excessive tool wear when machining hard workpieces. Oily cutting oils, especially those containing high extreme pressure additives, are the main cutting oils in this kind of steel. It should be noted that some cutting oils contain active sulfur, which can stain the alloys with high nickel content. Titanium and titanium alloys are more difficult to process than stainless steel, with very low thermal conductivity, high temperature at the interface between chips and tools, and titanium tends to weld with cutting tools under pressure, which will lead to early wear of tools. The general solution is to use cutting oil with low cutting speed and high EP additive content. < br style = "list style type: none;" / > the above is the content shared by Xiaobian today. I hope it can help you.