Abstract: An air-operated dental drill, including an elongated handle having a connector end for connection to a tubing connector and with an elongated air supply tube extending from the connector end to a head at the other end of the elongated handle and with the head supported on the other end of the handle and including an air turbine motor located within the head and with the outer housing of the head formed from a pair of complementary hollow members each mounted on opposite sides of a divider plate to accurately align and lock the pair of hollow members relative to each other and divide the air supplied to the air turbine motor. The air supply tube is threaded at both ends into complementary thread portions to lock the various members together. A removable light source is mounted at the head end of the dental drill and the drill includes a low voltage ring to supply power to the removable light source.