Abstract
Current drilling coolants generally use aqueous coolants, these coolants are synthetic chemicals or a combination of solvents and additives. which when used for a period of time will cause spoilage which affects the health of the workers And the environment as well, if the removal is not good. This thesis is to study the application of Minimum Quantity Lubrication (MQL) compared to other coolants.
The experiments identified three different cooling types: non-coolant drilling. Wet drilling and small volume coolant (MQL) drilling, each of which is configured. The speed is 500, 710, 1000 RPM, feed rate 0.025, 0.035, 0.05 mm/rev. The tool used for drilling is the drill bit (HSS) and the drill bit. is carbon steel SKD 55
From the experiment of using a small amount of coolant It can be seen that the wear rate of the drill cutting edge is that low-volume coolant (MQL) drilling is well suited to low-rpm drilling applications. The experimental results were at 710 RPM and at very low depths since the MQL coolant spray did not reach the cutting edge of the drill. The test was performed at a depth of 50 mm.