It was found that feed rate is most dominant factor in controlling surface roughness [7]. Ra values are almost in same range for lower values of depth of cut and cutting speed for both coated and uncoated inserts. Figure 6 shows that higher cutting speeds and with lower feed rates, the surface finish is high. Depth of cut has very less influence on surface roughness, but when depth of cut increases considerable increase in surface roughness was observed. Lastly, the type of tool has also dominant influence in controlling surface roughness