Most of the researchers were studied dry and wet machining and compared the dry and wet machining process. MQL technique considerably enhances cutting performance in terms of increasing tool life and improving the quality of the machined parts. Vegetable oils have been used in the food industry, but a recent trend shows they could also use as industrial fluids. Vegetable based lubricants are environmental friendly, less toxicity and easily biodegradable innature. The aim of the present work is to study the effect of minimum quantity lubrication (MQL) in the turning operation. Cotton seed oil were used in the present work and optimize the process parameters based on the MRR (material removal rate), tool wear and surface roughness. The input parameters were selected as speed, feed, and depth of cut at threedifferent levels for each parameter, L9 orthogonal array were designed by MINITAB software. It was found that the MQL provides better performance.

Keywords : Turning, optimization, MQL, Vegetable oil and tool wear.