Sewing machine equipped to make sewn rounds, with an internal core (cord) in cotton or rubber, covered with strips of leather or synthetic materials. Rounds from Ø10mm in diameter and above can be made continuously without limitations due to the exhaustion of the thread. Each size to be made requires a kit consisting of, guide, 2 pre-guides and 2 pairs of matrices, easy to install. The guides we make are easy to replace and long-lasting. Also equipped with speed variation, and it is possible to make other items on request.