Industrial Products and Applications - archive issue - year , issue 7, november-december 2020

The new S31 – The versatile machine for large tasks

The new S31 performs complex and varied grinding tasks precisely and reliably. It can be used to produce small to medium-sized workpieces with a distance between centers of 400, 650, 1000 and 1600 mm and a center height of 175 mm in individual, small batch and high volume production. With a high-resolution B-axis of 0.00005° the swiveling wheelhead enables efficient external, internal and surface grinding in a single clamping.

The foundation of the universal cylindrical grinding machine is the machine bed made from solid Granitan® S103. This provides high dimensional stability thanks to its favorable thermal behavior, while the mineral casting largely equalizes short-term variations in temperature. STUDER has redesigned the machine base geometry and added an innovative base temperature control. This ensures quick and stable production. The fixing of the dressing device on the double T-slot of the longitudinal slide drastically reduces the complexity of setup and changeover. A further highlight: The S31 features StuderGuide® guideways with their damping component in the direction of movement.

Very wide range of wheelhead variants
The S31 is based on the STUDER T-slide concept. It now has an extended X-axis stroke of 370 mm. This enables a large number of wheelhead variants, which can be precisely tailored to the customer's requirements. Customers can choose between the turret wheelhead with continuously variable B-axis or B-axis with 1° Hirth coupling. The turret wheelhead can be equipped with several grinding wheels. Thanks to the software for grinding wheel alignment, STUDER Quick-Set, changeover times are reduced by up to 90 percent. The new S31 enables grinding of different diameters and cones with just one grinding wheel and without time-consuming intermediate dressing. This is made possible by the direct drive on the B-axis with a positioning scatter of <1“.

Impressive software
Over a hundred years of grinding experience are invested in StuderWIN, which enables reliable programming and efficient operation. StuderTechnology also automatically calculates the optimal grinding parameters in a matter of seconds, based on just a little information. This means good quality and a stable process at the first attempt. The optional integrated modules such as StuderForm, StuderThread or StuderContourBasic, extend the functionality of the machine.

The S31 is equipped with a Fanuc 0i-TF and is optionally available with the Fanuc 31i-B for High Speed Machining (HSM). The PCU manual control unit enables setup of the machine close to the grinding process. Non-productive times can be reduced to a minimum with the electronic contact detection function. In addition, the standardized loader interface enables automation of the S31 .

Advantages at a glance
- Distances between centers 400, 650, 1000, 1600 mm
- Height of centers 175 mm
- Maximum workpiece weight 150 kg
- StuderGuide® in longitudinal and cross slides
- Thermal stability thanks to innovative base temperature control (dbc 650 to 1600 )
- Double T-slot for dressing systems
- Numerous grinding head variants
- Direct drive on B-axis with high-resolution direct measuring system
- Constant cutting speed as standard
- StuderWIN software with StuderTechnology
- Reduced setup and resetting times with STUDER Quick-Set
- Can be flexibly extended with integrated software modules
- Available with Fanuc 31i-B for HSM applications
- Automatable



The new S33 – The productive machine for individual requirements

Universal and flexible. These are the features of the new S33, the CNC universal cylindrical grinding machine from STUDER. With distances between centers of 400, 650, 1000 and 1600 mm and a center height of 175 mm, it can be used for grinding small, medium-sized and large workpieces up to 150 kg in individual, small batch and high volume production. The changeover from grinding between centers to live spindle grinding is achieved in record time. Complex workpieces are ground in a single clamping without any problem.

The foundation of the S33 universal cylindrical grinding machine is the machine bed made from solid Granitan®S103. Thanks to its favorable thermal behavior this provides high dimensional stability, while short-term variations in temperature are largely equalized by the mineral casting. STUDER has redesigned the machine base geometry and added an innovative base temperature control. This ensures quick and stable production. The fixing of the dressing device on the double T-slot of the longitudinal slide drastically reduces the complexity of setup and changeover.

Wide range of wheelhead variants
The S33 is based on the STUDER T-slide concept. It now has an extended X-axis stroke of 370 mm. STUDER offers a number of wheelhead variants. The turret wheelhead can take up to two external and one internal grinding spindle and enables automatic swiveling with a 1° Hirth coupling. It is also equipped with the latest generation of gap control. The external wheelhead with a wheel on the right can be set to 0°, 15° and 30°. Setup and changeover costs can be reduced thanks to the turret wheelhead with several grinding wheels and quick setup with the Quick-Set software. Internal, external and surface grinding in a single clamping is child's play for the S33 and leads to even higher efficiency in complete machining operations. Grinding of forms and threads is made possible by the C-axis with indirect or direct measuring system. The S33 can also be equipped with a chuck workhead for grinding chuck components.

Impressive software
Over a hundred years of grinding experience are invested in StuderWIN, which enables reliable programming and efficient operation. StuderTechnology also automatically calculates the exact grinding parameters in a matter of seconds, based on just a little information. This means good quality and a stable process at the first attempt. The optional integrated modules such as StuderForm, StuderThread or StuderContourBasic extend the functionality of the machine.

The PCU manual control unit enables setup of the machine close to the grinding process. Non-productive times can be reduced to a minimum with the electronic contact detection function. In addition, the standardized loader interface enables automation of the S33.

Advantages at a glance
- Distances between centers 400, 650, 1000, 1600 mm
- Center height 175 mm
- Maximum workpiece weight 150 kg
- Thermal stability thanks to innovative base temperature control (dbc 650 to 1600 )
- Double T-slot for dressing systems
- Numerous grinding head variants
- Motor spindle including frequency converter for turret wheelhead
- Constant cutting speed as standard
- StuderWin software with StuderTechnology
- educed setup and resetting times with STUDER Quick-Set
- Can be flexibly extended with integrated software modules
- Automatable



Fritz Studer AG

3602 Thun - Switzerland Tel. +41 33 439 1590