Drilling process is one of the manufacturing processes which plays an important role in machining industry. It has been reported that this process consists of 40% of all machining processes. Therefore, this process has a great influence on the final cost of workpieces. Apart from expenditures spent for drilling process, performing supplementary processes like reaming in order to reach to accurate dimensions can also cause an increase in the final price. To decrease costs in a twist drilling process, investigators’ attentions are moving toward improving drilling processes or finding new drilling methods. One of these new and recent methods is vibration drilling in which ultrasonic waves are used to aid drilling process. In fact in this process, that is a kind of hybrid processes, a harmonic vibration motion is added to ordinary (or conventional) drilling. As stated before, reduction in costs is one of the purposes to use vibration drilling. A part of this cost is related to cutting tool. One of the cutting tool damage factors is built-up edge which separates a layer of cutting tool surface while being removed. For this purpose, first, a primary vibration tool, respect to designing principles, designed and fabricated. Then, the longitudinal resonance frequency of this tool investigated experimentally and compared with longitudinal resonance frequency achieved theoretically. By comparison of results the factors made differences between results were found. Afterward, this vibration tool by a rotary mechanism was installed on a universal lathe machine to perform primary experiments in order to assess the accuracy of prepared vibration drilling system. Conclusions of the primary experiments showed that vibration drilling in contrast to ordinary drilling can decrease thrust force. After being sure about accuracy of prepared vibration drilling system, final vibration tool (regarding the experiences gained from designing and manufacturing primary vibration tool) was designed and fabricated. Some experiments in order to investigate built-up edge and comparing surface quality of holes, made by the two processes, were performed with final vibration tool for different machining parameters on aluminum 2024-T6. The effect of built-up edge on chip morphology is also studied in this thesis. Experiments were performed for every machining condition by making ten holes with a new HSS drill. The thrust force needed to drill every hole was measured by a KISTLER dynamometer and the effect of built-up edge on thrust force was studied for both ordinary and vibration drilling. After making ten holes for every machining condition, the built-up edge presence on drill bit was investigated by an optical microscope. The chips produced from first hole were compared to those of ten hole in every machining condition, in order to study the chip morphology. Generally, results of this study show the reduction of built-up edge constitution and improvement of surface quality in vibration drilling compared to ordinary drilling. Therefore, there is less need to use post processes for improving the quality of holes. Besides, vibration drilling produced much more shorter chips when compared to ordinary drilling. Key Words: Vibration drilling; Drilling; Built-up edge; Ultrasonic; Al2024-T6