Abstract
The machining process is a major activity in the industry, especially in the automotive industry. The machining process is inseparable from the coolant (coolant), where the role of the coolant in the machining process is to act as cool working conditions, material cleaning, and corrosion prevention. The use of cutting fluid has a negative impact when waste management is not carried out properly, and it will be damaging to the environment and public health. In order to reduce environmental and health damage, development and research have now been carried out for the use of vegetable-based cutting fluid. cutting fluid vegetable-based are biodegradable, eco-friendly, odorless, and non-toxic. This study wants to compare the value of surface roughness using CO (coconut oil) and dromus in face milling machining. The machine used in this research is the conventional Emco F3 milling machine and the tools used are the TPKN 22VC2 series carbide insert tools and the workpiece material used is cast iron (gray cast iron). the value of surface roughness by measuring the roughness using the TR200 surface roughness tool. The results of roughness observations show that the surface roughness value using CO cutting fluid at a cutting speed of 60 mm/min is 1,297 Ra, at a cutting speed of 70 mm/min the roughness value is 0.877 Ra and at a cutting speed of 80 mm/min, it is 0.429 Ra. While the results of measuring surface roughness on the material using a coolant dromus, cutting speed of 60 mm/min are 0.811 Ra, at a cutting speed of 70 mm/min the surface roughness value is 0.804 and at a cutting speed of 80 mm/min the surface roughness value is 0.698 Ra. So can the conclusion be that cutting fluid CO is good to use as a coolant at high cutting speeds.
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