Online monitoring of the condition of a cutting tool was still a challenging task which requires much attention to reduce the productivity loss. In this book, the work about online condition monitoring of a multi point cutting tool using the vibration signatures during machining of 7075-T6 Hybrid aluminum composite alloy is discussed.Cutting fluid also has significant effect on tool wear. So different vegetable based cutting fluid was chosen for experimentation.The optimized process parameter(Spindle speed, Feed rate and Depth of cut) along with type of vegetable based cutting fluid was found for minimum vibration in milling process.