ROUNDING AND CHAMFERING DEVICE

The present invention relates to an air beveling machine. The purpose of the present invention is to provide an air beveling machine, capable of easily controlling a quantity of air. To achieve this purpose in accordance to the present invention, the air beveling machine comprises: a tubular body housing having both end parts opened; an operating unit placed in the body housing, including a cutting tool exposed through an end of the body housing, and a rotation operating part rotating the cutting tool by operational air supplied through an other end part of the body housing; a connection unit combined with the other end part of the body housing, delivering the operational air from the outside to the operating unit; a valve body changing divergence of an air path in accordance to a rotation position by being inserted into the air path in a transverse direction in order to control a quantity of operational air supplied to the operating unit; and an air control valve including a manipulating knob to rotate the valve body outside the connection unit by being integrated with the valve body.