Abstract: An upright main frame is provided with horizontal rails extending transversely through the frame to form a travel path for crossties. A pair of motor driven adzing heads are supported below the crosstie travel path for forming rail seats on the depending surface of the crosstie as it moves through the machine. A boring tool frame, including longitudinal horizontally disposed beams, supporting a plurality of motor driven boring tools, is vertically movable within the frame for forming rail spike pilot holes in the crossties. A carriage frame is horizontally supported by the main frame for to and fro reciprocating movement below the plane defined by the upper limit of the crosstie supporting rails. Dogs, pivotally secured to the carriage frame, move the crossties along the travel path in a step-by-step fashion by the carriage frame movement.