Surface quality is the commonly used criteria in determination of milled steel quality. Etory Madrilles Arruda et.al.
[1] conducted milling experiments on AISI P20 work pieces with 6mm dia solid carbide tools at different feed rate,
radial depth of cut and contact angle. From the experimental results, the feed rate was found to be most significant
parameter on surface quality. Kadivar et al. [2] investigated the effect of ultrasonic vibration on drilling force,
reduction of burr size and surface roughness with two vibration systems. These two systems are used to vibrate work
piece as well as tool. A 5mm diameter TiN coated HSS drills are used in drilling of Al/SiCp metal matrix
composites. They concluded that the use of ultrasonic vibration reduces the burr height, drilling force and surface
finish when compared to conventional drilling. In drilling process, dimensional accuracy, cylindricity and surface
quality are the critical characteristics which determine the quality of drilled hole. Because, during assembly process
burr is considered to be a negative outcome. Ultrasonic vibration is one of the methods used to reduce or remove
burrs from drilled hole in order to improve surface finish