S141 – New internal cylindrical grinding machine for short and long workpieces.

The new S141 from STUDER has been redesigned from the ground up. However, the development also incorporates the know-how from many decades of grinding experience and consolidated state-of-the-art engineering knowledge. In addition to long-lasting and reliable quality and precision, the use of both cutting-edge and proven technologies, optimal ergonomics and ease of use were also important goals.

The machine''s ergonomic design and user friendliness are evident at first glance. Two generous sliding doors create optimal accessibility for both workpiece and grinding wheel change. Short changeover times and quick reprogramming of the control help to reduce auxiliary times, making the machine interesting for the production of individual components as well as small and large batches.

The series is available in different design lengths, for workpieces with maximum lengths of 300, 700 and 1300 mm.

The S141 is the ideal machine for grinding chuck components, spindle shafts, spindle housings, rotor shafts or axes. Many workpieces are in the areas of machine tools, drive elements, aerospace and toolmaking.

Highlights of the S141

 The machine bed, comprising patented Granitan® S103 mineral casting with excellent damping characteristics, ensures outstanding surface quality of the ground parts. Temporary temperature fluctuations are extensively compensated by the favorable thermal behavior of Granitan®. The StuderGuide® guide system for the X and Z axis is coated with Granitan® S200 wear-resistant guideway surfacing material and offers the highest precision, high load bearing capacity and strong damping across the entire speed range. StuderGuide® extends the benefits of hydrostatic systems and guideways with a patented surface structure. A big advantage of StuderGuide® in comparison with hydrostatic guides is the damping component in the direction of motion. The slides are driven by linear motors with direct measuring systems.

 The grinding spindle turret has four grinding spindles, including a maximum of two external grinding spindles. Internal grinding quills of lengths up to 265 millimeters can be used. A direct drive and high-resolution direct measuring system ensure quick, controlled rotational movements and precise positioning with a repeatability precision of less than one angular second. Workpieces can be completely machined both internally and externally in a single clamping with minimal auxiliary times. In addition, the grinding spindle turret has a universal measuring probe, which can be used e.g. for length positioning of a workpiece or diameter control measurement.

 The workpiece table, for workpiece lengths of 300, 700 and 1300 mm depending on the machine, can be automatically swiveled from -10° to +20° via the machine control system for axis-parallel grinding of tapers.

 The workhead can be driven directly or via a belt, as required.

 The robust steady-rest specially designed for internal grinding enables simple setup and universal use.

 The machine can be equipped with up to two pivoting dressing units with fixed or rotating dressing tools. This enables the engagement of optimized grinding tools throughout the machining process, fulfilling a key prerequisite for maximum precision with dimensional stability, contour accuracy and surface quality of the workpieces.

 The 15" touch screen operating terminal of the Fanuc control system series 31i-B with integrated PC is positioned on the right of the generously dimensioned double sliding door. The grinder thus has the best possible overview of the work area during machine operation.

 Two different intuitive operating systems, StuderWIN and StuderSIM, are available. Both operating systems are suitable for a wide variety of internal grinding applications and enable reliable programming of all basic cycles for grinding, dressing and process-supporting measurement.

Extended range of applications, increased cost effectiveness

Fritz Studer AG is presenting the S141 as a sophisticated redesign. Several of these machines have already been in use in the company''s production areas for many months. They have already proved the machine''s reliability in the production of high-quality workpieces in rigorous everyday use. All areas of the machine have been subjected to sophisticated test scenarios. Optimizations that may prove desirable for new developments within the industry have therefore already been taken into account at market launch.