S121 / S131 / S141 Radius
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HEADLINE HEADLINE RADIUS INTERNAL CYLINDRICAL GRINDING MACHINES A member of the UNITED GRINDING Group

THE HELITRONIC POWER DIAMOND 400 STUDER S121/S131/S141 IN USE The S121/S131/S141 are premium machines for internal cylindrical radius grinding. With a range of different configurations and sizes, the right machine can be defined for any application. The maximum swing diameter is 400 mm (15.75”) while the maximum workpiece weight is 100 kg (220 lbs).

THE EXPERTS The radius internal cylindrical grinding machines are the experts for high-precision internal cylindrical grinding of radii, spheres, balls, tapers, and diameters. Their main fields of application are in the manufacture of dies made of carbide and ceramics and the production of hydraulic components. They can also manufacture complex workpieces made from industrial ceramics, sapphire, and carbide for other applications. The S121 is especially suited for grinding complex workpieces made from very hard materials, and for general grinding tasks. It has a maximum of two spindle...

S121/S131/S141 HARDWARE Fully automatic workpiece swivel axis with direct drive and simultaneous interpolation with the X and Z axis. Swiveling range of -20° to +91° (S121) and -60° to +91° (S131/S141) Wheelhead can be configured with two (S121) and up to four grinding spindles (S131/S141) Frequency-controlled motor grinding spindles for external and internal grinding Precise C axis on the workhead spindle for form and thread grinding C.O.R.E. Panel Portable control unit (PCU) for setting up close to the grinding process Full enclosure with two sliding doors StuderGuide® guideway system...

C.O.R.E. – CUSTOMER ORIENTED REVOLUTION C.O.R.E. PANEL – THE FUTURE OF OPERATION C.O.R.E. helps us make your production fit for the digital future. It’s based on a new operating system, C.O.R.E. OS that equips the machine with intelligence. Thanks to the uniform C.O.R.E. software architecture, exchanging data between UNITED GRINDING machines is easy. The integrated umati API can be used to communicate with third-party systems as well. It also offers access to UNITED GRINDING Digital Solutions™ products directly on the machine. C.O.R.E. not only establishes the technical foundation for this...

USER INTERFACE StuderSIM The machine control uses the StuderSIM operating system. This system, developed especially for internal grinding applications, enables programming of all basis cycles for grinding, dressing, and measurements to support the process. The basic cycles, such as face, bore, taper and thread grinding, as well as dressing and measuring, are defined by parameter input windows. This type of programming ensures maximum flexibility and remains very user-friendly and workshop-oriented. SENSOR/ MEASURING PROBE Each cycle is equipped with dynamic assistance and guides the...

GRANITAN® S103 MINERAL CASTING MACHINE BASE STUDERGUIDE® IN LONGITUDINAL AND CROSS AXIS The material structure developed by STUDER on the basis of the company’s own formula, which has proven its worth over many years, is produced in a plant using the most modern industrial techniques. The excellent damping properties of the machine base ensure that an outstanding surface quality is achieved in the ground workpieces. The service life of the grinding wheel is also increased, leading to reduced downtimes. Temporary temperature fluctuations are extensively compensated by the favorable thermal...

WHEELHEAD The wheelhead on the S121 is hydraulically swiveled 180° degrees to fixed stops. It can be fitted with two grinding spindles (of which one an external grinding spindle). The S121 can also be equipped with one or two fixed grinding spindles in a linear arrangement. The wheelhead on the S131/S141 with integrated swivel axis permits the use of up to four grinding spindles (of which maximum 2 external grinding spindles) and a universally useable measuring probe. The swivel axis has a direct drive capable of rapid and precise positioning. The high resolution direct measuring system...

The high-precision workhead is fitted with special bearings and guarantees maximum accuracy of roundness. The A4/MT5 spindle nose is consistent with standard DIN/ISO 702-1. The air lift makes it easier to move the workhead during setup and resetting. A high-precision C axis with a direct measuring system on the workhead spindle is available for form and thread grinding. An easy-cutting grinding wheel is essential for cost-effective and high-quality grinding. STUDER offers a large selection of dressing units, to adapt the dressing process flexibly and optimally to the workpiece, tool, and...

AUTOMATION For the radius internal cylindrical grinding machines, STUDER has developed the roboLoad, based on a robot cell, a specific loader solution for this market segment. The automation solution is suitable for chuck parts up to a part length of 100 mm (3.94”) and a part diameter of max. 260 mm (10.2”) thus covering a large part of the range of parts produced on these machines. Parts are supplied via a standardized, adaptable grid storage system. The enclosure of the basic module, adapted to the machine design and fitted with a loading hatch as standard, enables a safe and clean...

CUSTOMER CARE – WE ARE HERE FOR YOU Start up Commissioning Warranty extension Our products are designed to meet customer demands for as long as possible, to operate efficiently, reliably, and be available at any time. From ”start up” to ”retrofit” – our Customer Care is there for you throughout the working life of your machine. That’s why over 200 expert service contacts working around the world in 10 different languages are available locally. We provide fast, uncomplicated support. Qualification Training Product support Prevention Maintenance Inspection We help to increase your...

TECHNICAL DATA MAIN DIMENSIONS Swing diameter over the table Max. workpiece weight including clamping device CROSS SLIDE: X AXIS Max. travel Speed Resolution Distance between guideways LONGITUDINAL SLIDE: Z AXIS Max. travel Speed Resolution Distance between guideways Swivel range Repetition accuracy Swivel time for 180 deg Resolution Internal grinding Mounting bore Speeds Grinding mandrel length (max. that can be swiveled on the turret) External Grinding Circumferential Speed Fitting taper Grinding wheel, dia. x width x bore Options Probe Swivel range Repetition accuracy Resolution CHUCK...