• Adul Phuk-in Faculty of Industrial Technology, Uttaradit Rajabhat University



Property enhancement of Nam Phi Iron, Drill bit cutting machine creation, Re-vulcanization, Induction cooker


This research used the smelted Nam Phi iron and melted it by an induction cooker to enhance the alloy element during melting and getting the enhanced-property of iron bar. It was shaped by turning, grinding, forming by the automated machine, Computer Numerical Control machine (CNC), enhancing metallurgy properties, coating titanium-aluminum-nitride (TiAIN). The product was taken to analyze the quantity of alloy. Nam-Phi-iron drill bit was tested by using 22 factorial methods to determine rotation speed and cutting speed suited to drill 15-mm.-thick SCM440 steel. The results revealed that the suitable rotation speed was 400 rpm, and the cutting speed was 36 meters per minute. The result was used to randomly compare 3 general industrial steels: SS41, S45C and SCM440. The result of mean difference using pairwise comparison showed that the pairs of SCM440 (Y3) and SS41 (Y1) and SCM440 (Y3) and S45C (Y2) was different in statistical significance at the level of .05, as shown by Duncan’s multiple range test (DMRT). The drilling design used 150 pieces of SCM440 steel to find the percentage of yield. The percentage of yield of Nam Phi drill bit was 66.67 yield, the steel scrap twisted roundly, had no-colored burned scraps, and the percentage of yield of general industrial drill bit was 15.34, the steel scrap twisted less and had colored scraps from drilling burnt.


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How to Cite

Phuk-in, A. . (2022). THE EVALUATION OF DRILLING PERFORMANCE OF NAM PHI DRILL BIT. Life Sciences and Environment Journal, 23(1), 219–234.



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