STUDER / Studer Cylindrical Grinding Machines

Swiss precision cylindrical grinding machines STUDER / Studer: favorit, S31, S33, S41, S121, and S131 series on Granitan mineral-cast machine bases with StuderGuide slideways.

CNC Universal Cylindrical Grinding Machines STUDER favorit

The favorit is a CNC universal cylindrical grinding machine for the individual and batch production of short to long workpieces. Solid Granitan S103 mineral-casting machine base delivers outstanding thermal stability. Modern Fanuc control achieves sub-micron accuracy in external and internal cycles.

favorit universal series for external and internal cylindrical grinding
Machining precision components for machinery, toolmaking, and prototyping
Distances between centers up to 1600 mm, center height 175 mm, Granitan base
Assemblies: motorized spindles, linear encoders, hydraulic units, coolant nozzles

Versatile Cylindrical Grinding Machining Centers STUDER S33

The S33 is a CNC universal cylindrical grinding machine for individual and batch production of workpieces. Versatile wheelheads with two motor spindles execute complex external and internal grinding in a single setup. The C.O.R.E. operating interface ensures precise digital process control.

S33 series for medium-batch and individual production of complex shafts
Machining transmission shafts, hydraulic spools, and precision rotor cores
Turret wheelhead with dual motor spindles, C.O.R.E. digital operating system
Assemblies: spindle bearing packs, feed servodrives, linear optical scales

High-Precision CNC Cylindrical Grinders STUDER S31

The S31 is a CNC universal cylindrical grinding machine for large workpieces. Direct drive B-axis with 0.00005 degree resolution enables high-precision form grinding of complex contours and tapers. Modular wheelhead architecture delivers flawless surface quality in continuous manufacturing.

S31 modular series for multifaceted high-precision cylindrical grinding
Fabrication of hydraulic valve spools, aerospace shafts, and taper mandrels
Direct-drive B-axis indexing with 0.00005 deg resolution, multi-wheel support
Components: rotary B-axis drives, telescopic way covers, in-process probes

Heavy-Duty CNC Cylindrical Grinding Centers STUDER S41

The S41 is a CNC universal cylindrical grinding machine of the latest generation packed with technological features such as the revolutionary StuderGuide guideway system. Hydrostatic damping and direct linear drives ensure sub-micron positioning for heavy workpieces weighing up to 250 kg.

S41 production series for heavy cylindrical workpieces up to 250 kg
Grinding turbomachine shafts, industrial generator rotors, and machine spindles
StuderGuide hydrostatic guideway dampening, direct-drive linear axis motors
Assemblies: hydrostatic pressure regulators, linear motors, headstock units

Compact CNC Internal Cylindrical Grinding Machines STUDER S121

The S121 is a CNC universal internal cylindrical grinding machine of the latest generation for internal, face and external grinding of chuck workpieces. Its compact footprint maximizes shop floor space while rigid Granitan casting and direct high-frequency spindles achieve sub-micron accuracy.

S121 series for high-accuracy internal, radius, and face chuck operations
Machining bearing rings, collets, hydraulic sleeves, and precision gears
Spindle turret with high-frequency internal grinding motorized spindles
Spares: HF grinding spindles, diaphragm clamping chucks, diamond dressers

Radius and Internal Cylindrical Grinding Machines STUDER S131

The S131 is a CNC universal internal cylindrical grinding machine of the latest generation for internal and radius grinding of exceptionally tough materials. Designed for drawing dies and ceramic parts, it combines StuderGuide slideways with specialized radius interpolation software.

S131 radius series for ultra-hard carbides and engineering ceramics
Grinding wire drawing dies, stamping punches, can tooling, and gages
Advanced radius interpolation, StuderGuide hydrostatic ways, C.O.R.E. OS
Components: precision spindle quills, in-process gauging units, coolant filters

STUDER / Studer Cylindrical Grinding Systems Overview

Swiss machine tool manufacturer Fritz Studer AG designs and produces high-precision cylindrical grinding machines of the favorit, S31, S33, and S41 series, alongside S121 and S131 internal grinding centers.

Serving aerospace, automotive, toolmaking, and precision engineering sectors, machines feature Granitan S103 mineral-cast bases, StuderGuide slideways, and high-speed motorized grinding spindles. Modular architecture adapts the working envelope to demanding manufacturing tasks.

Technical Selection Guidelines for Grinding Centers

Machine selection depends on workpiece dimensions, required surface finish, and targeted grinding methods. Flexible small-to-medium shaft production matches favorit and S33 universal grinders with indexing wheelheads.

Demanding tapers and multifaceted profiles require S31 centers with direct-drive B-axis positioning, while heavy shafts and turbine rotors up to 250 kg run on high-end S41 production platforms.

Granitan Mineral Casting and Thermal Stability Engineering

STUDER machine beds are manufactured from proprietary Granitan S103 mineral casting, offering several times higher vibration dampening and thermal inertia than cast iron.

Superior thermal capacity isolates machining zones from shop ambient temperature fluctuations, guaranteeing long-term dimensional repeatability during continuous precision manufacturing shifts.

StuderGuide Slideway Systems and Linear Drive Dynamics

Patented StuderGuide slideway systems combine hydrodynamic oil film guidance with hydrostatic damping properties, completely eliminating stick-slip phenomena at microscopic feed increments.

Combined with contactless linear motor drives, systems deliver swift traverse accelerations, reduced non-productive cycle times, and sub-micron positioning repeatability.

Internal and Radius Grinding Technologies on S121 and S131

STUDER S121 and S131 internal cylindrical grinders process tough tungsten carbides, hardened die steels, and engineering ceramics.

Continuous radius interpolation software paired with multi-spindle turret headstocks enables face grinding, internal cylindrical boring, and spherical contour profiling in a single chuck clamping.

C.O.R.E. Digital Operating Platform and Smart Manufacturing

STUDER cylindrical grinding machines feature the unified C.O.R.E. digital operating system from UNITED GRINDING, integrating intuitive touchscreen interfaces with Industry 4.0 network connectivity.

Continuous sensor telemetry monitoring hydrostatic pressures, spindle thermal status, and axis drive performance provides predictive maintenance diagnostics.

STUDER / Studer and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of STUDER / Studer and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.