The electro-upsetting machine ER 125 DC-SP is the result of a long experience in the construction of machines studied for the production of studs, one, two or three, with a complete automatic procedure, on ornamental bars intended for gates, railings and grates. In this machine the thrusts on the two sides are generated by servo-motors. In this way a perfect symmetry and a perfect repeatability can be reached. Possibility of working on round or square bars having indefinite length with diameter or side till 40 mm. The heating is obtained by rectified current.