At the cutting speed 350 m/min, uncoated inserts performed equally well to the coated inserts in terms of tool
wear and surface roughness. Uncoated tool produced more or less values of surface finish and tool wear during the
intermittent cut while comparing to the coated tool at the value of 350 m/min cutting speed. Uncoated inserts also
got worn off at higher cutting speeds as like coated inserts but the tool wear rate is very high. Moderate cutting
parameters are best suitable for the uncoated inserts in terms of tool life and cost. The main effect analysis is used to
study the trend of the effects of each of the factors. The relations established in main effect plots are pretty similar to
coated insert’s main effect plots .The main effect plots for uncoated inserts were shown in Fig 3 and Fig 4
respectively.