The S33 model of universal grinding machine from Studer brings important advantages for customers in tool making, job shops and the supply industry: Countless workpiece geometries can be ground in a single clamping! The wheel-head with three grinding wheels ensure that the work piece can be machined even more individually and quickly.

In addition to the familiar production wheel head, which can be used at 0 deg and 30 deg, the universal head can be fitted with two external grinding spindles and one internal grinding spindle. Both external grinding wheels with Ø 500 x 63mm (80/110mm Form 5) are arranged on the right. The universal head can be manually positioned every 2.5 deg or is available with automatic B-axis with 1 deg Hirth serration. HF spindles are exclusively used for internal grinding.

The clever design of the S33 allows us to achieve an up to 1/3 extended grinding length, in comparison with the competitors. In conjunction with grinding wheel arrangement on the right with plunge angle 30 deg, reduction of the efficient grinding length should always be taken into account.

The S33 is available with a CNC control and integrated PC. This enables the use of the new StuderWIN operator interface. The StuderGRIND programming software modules can now be installed directly on the control system.

Proven S33 features: Unique arrangement of the motor spindles. Very simple changeover from grinding between centers to live spindle grinding. Swivelling machine table. Optional C-axis for form and thread grinding. Granitan^® machine bed. Large selection of options and accessories.

The S41 CNC universal cylindrical grinding machine is characterized by outstanding technology and cost-effectiveness. The machine grinds with much higher precision, paired with a much greater metal removal rate. In addition the longitudinal and cross slide, as well as the swivel axis for the wheelhead are equipped with electric direct drives, which move to the working position much more quickly and precisely.

Higher precision, better surface quality, higher metal removal rates – these are the constantly increasing requirements made by the market on the cost-effectiveness of grinding machines in a nutshell. In fulfilling these requirements, Fritz Studer AG once again sets standards with its S41 CNC universal cylindrical grinding machine. The developers used the practical know-how from a predecessor machine proven worldwide over many years, but the machine scores with a number of outstanding design features. It works more quickly and precisely and also offers a broader range of applications, with production options that are highly attractive with regard to cost-effectiveness. And by saving on auxiliary times, it considerably shortens the cycle times of the grinding process.

Maintenance-free guide system

The new StuderGuide^® guideway system ensures high precision of the longitudinal and cross slides when both stationary and during movement. The StuderGuide^® guideway system uses the advantages of hydrostatic and hydrodynamic guide systems and avoids the slip-stick effect or floating of the slide. Also contributing to the machine’s high precision is the fact that the solid gray cast iron longitudinal and cross slides rest completely on the guideways over the entire travel. With this maintenance-free guide system, Studer guarantees a straightness of < 0.003 millimeters over a measured length of 950 millimeters. The first test results even gave values of < 0.002 millimeters.

Machine variants expand market potential for users

In addition to the considerable increases in working speed and precision, the S41 also has a number of advantageous characteristics which enable the user to cover an extended workpiece range, and thus a broader market range.

• For instance the height of centers on the standard version has been increased to 225 millimeters. The machine is also optionally available with a height of centers of 275 millimeters; this is not achieved by means of distance plates, but by making the workheads higher. The maximum distance between centers is 1000 millimeters on the standard machine, but a machine variant with a distance between centers of 1600 millimeters is also available. Thanks to the greater heights of centers and distances between centers, workpieces with weights of up to 250 kg can now also be machined. The machine is equipped with a hydraulically clamped tailstock for the heavier workpieces.
• Up to four external grinding wheels or three internal grinding spindles enable over 30 grinding head combinations. The grinding wheels are no longer driven by belt drives, but only by motor spindles. The machine can also be equipped with motor spindles for high speed grinding (HSG). Internal grinding spindles with speeds from 6000 to 120,000 rpm can be used. Automatic balancing systems and frequency converters for each external grinding spindle allow the grinding process to be specifically matched to the respective conditions of use. Wheel head variants are also available with a vertical spindle for grinding keyways or with a traverse-grinding axis for traverse grinding of internal tapers.