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The study investigated the application of Response Surface Methodology (RSM) in determination of optimum parameters required for drilling stainless steel based on L9-A 34-2 fractional factorial design. The SS304 stainless steel workpiece is of length 200mm, breadth of 80mm and thickness of 0.75mm. The study employed the following process parameters namely, cutting speed which ranges from 1400-1700rpm, feed rate which ranges from 0.11- 0.75mm/rev, depth of cut which ranges from 0.25-0.75mm and tool which ranges from 6-8mm, for minimizing surface roughness of drilled hole in SS304 stainless steel. Analysis of Variance (ANOVA) was carried out to test for the significant level of the process parameters for optimizing surface roughness. The findings revealed that for an optimal value of drilling parameters for minimizing surface roughness, cutting speed, feed rate, depth of cut and tool should be set at 1500rpm, 0.35mm/rev, 0.50mm and 6mm, for a surface roughness value of 6.56Î¼m. The findings also revealed that there exist with a good agreement between the estimated and experimental results based on the mathematical model formulated.
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