Slitting machine, more particularly for hides and leather, unwoven textile products, rubber materials, plastics in plates, comprising a framework, a working table for presenting the materials or products to the slitting process, a driving device for said products or materials by means of two cylinders mounted in front of an endless cutting blade the upper and the driving of said cylinders being placed above and the lower cylinder, being a cylinder with elements, beneath the plane of the tensioned side of said endless cutting blade supported by two pulleys, at least one of which is motive and tensioning, the spacing between said cylinders being adjustable, a sharpening system constituted by two grinding wheels each one of which is acting on one of the two bevelled faces forming at the intersection thereof the cutting edge of said blade, said machine being characterized in that the bearing structure thereof is designed to divide parts of said machine in two distinct assemblies, namely:
- a fixed assembly carrying means for presenting, positioning and driving the products, disposed on either side of the cutting line and adjustable distinctly and separately with respect to this cutting line constituted by the cutting edge of the tensioned upper side of said endless blade;
- and an assembly which is mobile within the horizontal plane relative to the fixed assembly and includes a frame for the support of said blade, provided with means for guiding, positioning, driving and sharpening, said blade, the cutting edge of which is formed at the intersection of two sharpened bevelled faces and has an immutable position within the horizontal plane relative to said frame;
- said mobile assembly being movable relative to said fixed assembly of the structure to modify the spacing between the driving plane which is the imaginary plane passing through the axes of said upper driving cylinder and of said lower cylinder with elements supported by said blade positioned in an immutable manner within the horizontal plane relative to said mobile assembly.