A trench cutting machine for making a cut in a surface. The trench cutting machine comprises a frame comprising at least one rear axle and at least one front axle and a rotatable circular blade mounted to the frame. The front axle is vertically adjustable relative to the frame between a first position where the circular blade is lifted clear of the surface, and a second position where the circular blade is arranged to extend downwards from the frame to cut a predetermined distance into the surface. The frame comprises an auxiliary front axle located in front of the axis of rotation of the circular blade, wherein the auxiliary front axle and the rear axle are arranged to support the frame on the surface during a cutting operation and to maintain a selected depth of cut.