The key duplicating machine Q30A adopts wide angle LED lights so that all the working tracks can be clearly seen during duplicating of the key. The vertical feed self-lock fixed hand shank can realize fixed feeding depth with single hand operation during key duplicating. It is also equipped with guide pin feeding fine adjusting unit. The patented gripper which can realize rapid exchange saves the time of changing and calibration of gripper because of abrasion. The machine is equipped with build-in 12V vehicle mounted power socket which can provide reliable power supply during door-to-door key duplicating service. Q30A is also equipped with horizontally moving dust cover and cutter speed adjusting function, thus, it can be used for duplicating of different patterns of keys.