Abstract
The Lagun FU100 Milling Machine (LFR 26) is a type of milling machine located at the Bandung Manufacturing Polytechnic. There is a surprising opinion that the Lagun Milling machine is rarely used, both for student academic activities and production purposes. Generally milling machines can achieve a surface roughness of 0.32-25 µm. Appendix 3 shows the results of the surface roughness of the grinding results. So this research was carried out to prove that this machine can reach surface roughness standards, and also to state that this machine is still suitable for use for production activities or student academic activities and to prove that this machine can still produce products of good quality. In this study, the three parameters evaluated were cutting speed, feed rate, and depth of cut. Through experiments and statistical analysis, it was found that RPM at a medium level produced the lowest roughness value of 0.340, while cutting depth at a high level produced the smoothest surface roughness with a value of 0.330. Feed rate at the medium level also shows the lowest surface roughness results with an average of 0.330. The research results show that the smoothest surface that can be produced is 0.2883, this value is at level N4. In addition, the Lagun FU100 milling machine was declared suitable for use in achieving the desired roughness value, demonstrating the ability of this machine to produce surfaces with the expected quality standards.
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