Cylindrical Grinder is designed to handle long parts.

Press Release Summary:

Featuring 1,000 mm capacity between centers for complex shaft-type parts, Studer universal cylindrical grinder model S33 1000 has modular design with digital control and drive systems, step-by-step programming, and 130 kg chuck capacity between centers. Basic wheelhead can be indexed at 0° or 30° for straight and angular plunge grinding, while universal turret wheelhead swivels manually or automatically for external, internal, and face grinding of workpieces in one setup.

Original Press Release:

New S33 1000 Offers Even Greater Capacity for Long Parts

MIAMISBURG, OH - United Grinding Technologies, Inc. (UGT) announces the introduction of an addition to its Studer line of high-performance universal cylindrical grinders, the S33 1000. The new S33 has even greater capacity between centers - 1000 mm - for longer, complex shaft-type parts, and was designed around the popular S33 (650 mm between centers) that was introduced in late 2003. At IMTS the new S33 1000 will demo its flexibility by going from a "chucked" part to a part "between centers" in less than three minutes - part-to-part.

Modular design for quick setup and changeover, state-of-the-art digital control and drive systems and user-friendly step-by-step programming make the S33 a remarkably flexible solution to a wide variety of internal and external cylindrical grinding applications.

According to Fred Gaegauf, technical director/managing director, Fritz Studer AG (Thun, Switzerland), the S33 machines have been designed to take into account the specific needs of the North American market. Gaegauf, who spent several years working closely with customers in North America, says the new S33 reflects the expressed desire for a machine to address internal and external applications in a single platform. "The level of versatility and flexibility increasingly requested by this important market is significantly and uniquely addressed in design and capabilities of this new machine," Gaegauf says. "The S33 1000 clearly demonstrates our full commitment to tailor products around the explicit requirements of our customers."

Center height is 175 mm. Between-centers grinding length is 1000 mm. OD Wheel size: 500 mm x 80 mm x 203.8 mm. Chuck capacity between centers is 130 kg.

The basic wheelhead can be indexed at 0° or 30° for straight and angular plunge grinding. A universal turret wheelhead swivels manually or automatically, permitting external, internal and face grinding of workpieces in a single setup. A serrated Hirth ring coupling maintains wheelhead orientation -15° to + 195° within 3° resolution (optional automatic resolution to 1°), thus providing extreme accuracy and repeatability for grinding even the smallest tapered angles.

S33 overview

V and flat guideways are coated with abrasion-proof Granitan S200 and provide high vibration dampening and superior rigidity. The machine base of Studer-developed Granitan S103 delivers outstanding vibration dampening, rigidity and strength, as well as excellent chemical stability and thermal compensation.

Digital direct-drive, three-phase servo motors with 40-mm diameter prestressed, precision ballscrews power the X- and Z-axes. Cross slide X-axis travel is 285 mm at speeds ranging to 5000 mm/min. Linear resolution is 0.0001 mm. Distance between slideways is 280 mm. Z-axis slide travel is up to 1150 mm. Speed and linear resolution are respectively 10,000 mm/min and 0.0001 mm. Z-axis distance between slideways is 200 mm. Z-axis table tilts up to 8.5° for high-precision grinding of tapers.

Grinding spindle is powered by a 7.5 kW motor and has high-precision roller bearings for precise, high-resistance, maintenance-free operation. Peripheral speed up to 45 m/sec with infinitely adjustable speed control to 3200 RPM. Workpiece spindle, with high-precision roller bearings, handles grinding between dead centers as well as live grinding with revolving spindle. Precision control permits fine adjustment of cylindricity during grinding operations to +/- 40 µm.

Guaranteed tolerance precision: 0.0004 mm on roundness and 0.0025 mm straightness deviation over a length of 1000 mm.


Wheel dressing intervals may be made by the operator following these simple methods: by pressing a pushbutton at any time during any grinding cycle; after a programmed number of specific machined parts or grinding operations; at programmed switchover points; at the programmed nominal size; after a specific number of strokes - or a combination of these, permitting the optimum solution for the specific grinding application.

Grinding wheel reference points are referred to as "T" numbers, and together with Studer grinding cycles, "T" numbers permit programming with nominal sizes. The actual value indication on the control LCD refers in each case to the programmed wheel reference point. Values of the grinding wheel shape are entered in a dressing dialog display at the control..

Control & programming

The S33 features state-of-the-art Fanuc 21i digital control and axis drive components. Machine operation, setup, changeover, dressing and programming of even complex parts are easily accomplished through the innovative, step-by-step Studer Pictogramming which allows operators simply to connect grinding cycles to one another and add necessary numerical values. The control then generates the machine program automatically. Advanced manual programming in G code is of course also possible. Programming is done directly at the machine or off-line and then downloaded to the machine control. Process parameters can be changed on the fly, while the machine runs, without affecting the workpiece program.

The S33 control package features proven application-specific Studer grinding cycles for diameters, shoulders (left and right), tapers (negative and positive) and contours.

Studer universal, external and internal grinders are supported by an expert team of grinding specialists and technicians drawing on more than 10,000 machine installations and a worldwide support and service network.

United Grinding Technologies, Inc., the North American arm of the Korber-Schleifring Group and supplier of such venerable nameplates as Blohm, Ewag, Jung, Magerle, Studer, Studer Schaudt and Studer Mikrosa, is a global leader in grinding technology and has built a reputation for industry-leading innovation and unparalleled service and support.

For more information, contact United Grinding Technologies, Inc.; 510 Earl Blvd., Miamisburg, OH, 45342. Tel:-937/847-1222. Fax: 937/859-1115.

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