Multi bit hand driller attachment
There is one most considerable problem in hand drill that it has bit changing socket which is very time consuming. That means it takes almost a half of minutes in changing the bit from the socket. This project will give safe, quick and dirt free drilling method for workshop applications.The project work is focused on preparing an advantageous attchment in hand drilling machine so that the time consumption in non processing work like positioning, preparing and most considerable drill bit exchanging. The most considerable exchanging process contains at least 30 to 40 seconds for maintaining the working position with one bit from the position of working from another bit. The project work will be focused in arrangement of the system not the weight and material of the system. Even though material weight and strength willl be taken in account but the not in the engineering level. One other thing is that in this modification the drill chuck is eliminated which is main advantage. The chuck manufacturing for driller machine is too much costlier and critical process. So this is a great advantage for a modification. According to calculation the time consumption for bit changing is 7 seconds which is quite good enough comparison to the 25.571 seconds. It is saving 18.90 seconds of the time. This is saving almost 70% of the idle time comparison with previous hand driller work.